WIP: use HdlOption[the_type_var] or UInt[123 + n] for creating types

crates/fayalite-proc-macros-impl/src/fold.rs

@@ -233,16 +233,20 @@ forward_fold!(syn::WherePredicate => fold_where_predicate);
 no_op_fold!(syn::parse::Nothing);
 no_op_fold!(syn::token::Brace);
 no_op_fold!(syn::token::Bracket);
+no_op_fold!(syn::token::Group);
 no_op_fold!(syn::token::Paren);
 no_op_fold!(syn::Token![_]);
 no_op_fold!(syn::Token![,]);
 no_op_fold!(syn::Token![;]);
 no_op_fold!(syn::Token![:]);
+no_op_fold!(syn::Token![::]);
 no_op_fold!(syn::Token![..]);
 no_op_fold!(syn::Token![.]);
 no_op_fold!(syn::Token![#]);
+no_op_fold!(syn::Token![<]);
 no_op_fold!(syn::Token![=]);
 no_op_fold!(syn::Token![=>]);
+no_op_fold!(syn::Token![>]);
 no_op_fold!(syn::Token![|]);
 no_op_fold!(syn::Token![enum]);
 no_op_fold!(syn::Token![extern]);
@@ -251,3 +255,4 @@ no_op_fold!(syn::Token![mut]);
 no_op_fold!(syn::Token![static]);
 no_op_fold!(syn::Token![struct]);
 no_op_fold!(syn::Token![where]);
+no_op_fold!(usize);

crates/fayalite-proc-macros-impl/src/hdl_bundle.rs

@@ -0,0 +1,857 @@
+use crate::{
+    hdl_type_common::{
+        common_derives, get_target, ItemOptions, MakeHdlTypeExpr, MaybeParsed, ParsedField,
+        ParsedFieldsNamed, ParsedGenerics, SplitForImpl, TypesParser, WrappedInConst,
+    },
+    kw, Errors, HdlAttr, PairsIterExt,
+};
+use proc_macro2::TokenStream;
+use quote::{format_ident, quote_spanned, ToTokens};
+use syn::{
+    parse_quote, parse_quote_spanned,
+    punctuated::{Pair, Punctuated},
+    spanned::Spanned,
+    token::Brace,
+    AngleBracketedGenericArguments, Attribute, Field, FieldMutability, Fields, FieldsNamed,
+    GenericParam, Generics, Ident, ItemStruct, Path, Token, Type, Visibility,
+};
+
+#[derive(Clone, Debug)]
+pub(crate) struct ParsedBundle {
+    pub(crate) attrs: Vec<Attribute>,
+    pub(crate) options: HdlAttr<ItemOptions>,
+    pub(crate) vis: Visibility,
+    pub(crate) struct_token: Token![struct],
+    pub(crate) ident: Ident,
+    pub(crate) generics: MaybeParsed<ParsedGenerics, Generics>,
+    pub(crate) fields: MaybeParsed<ParsedFieldsNamed, FieldsNamed>,
+    pub(crate) field_flips: Vec<Option<HdlAttr<kw::flip>>>,
+    pub(crate) mask_type_ident: Ident,
+    pub(crate) mask_type_match_variant_ident: Ident,
+    pub(crate) match_variant_ident: Ident,
+    pub(crate) builder_ident: Ident,
+    pub(crate) mask_type_builder_ident: Ident,
+}
+
+impl ParsedBundle {
+    fn parse_field(
+        errors: &mut Errors,
+        field: &mut Field,
+        index: usize,
+    ) -> Option<HdlAttr<kw::flip>> {
+        let Field {
+            attrs,
+            vis: _,
+            mutability,
+            ident,
+            colon_token,
+            ty,
+        } = field;
+        let ident = ident.get_or_insert_with(|| format_ident!("_{}", index, span = ty.span()));
+        if !matches!(mutability, FieldMutability::None) {
+            // FIXME: use mutability as the spanned tokens,
+            // blocked on https://github.com/dtolnay/syn/issues/1717
+            errors.error(&ident, "field mutability is not supported");
+            *mutability = FieldMutability::None;
+        }
+        *mutability = FieldMutability::None;
+        colon_token.get_or_insert(Token![:](ident.span()));
+        let options = errors.unwrap_or_default(HdlAttr::parse_and_take_attr(attrs));
+        options
+    }
+    fn parse(item: ItemStruct) -> syn::Result<Self> {
+        let ItemStruct {
+            mut attrs,
+            vis,
+            struct_token,
+            ident,
+            mut generics,
+            fields,
+            semi_token,
+        } = item;
+        let mut errors = Errors::new();
+        let mut options = errors
+            .unwrap_or_default(HdlAttr::<ItemOptions>::parse_and_take_attr(&mut attrs))
+            .unwrap_or_default();
+        errors.ok(options.body.validate());
+        let ItemOptions {
+            outline_generated: _,
+            target: _,
+            custom_bounds,
+            no_static: _,
+            no_runtime_generics: _,
+        } = options.body;
+        let mut fields = match fields {
+            syn::Fields::Named(fields) => fields,
+            syn::Fields::Unnamed(fields) => {
+                errors.error(&fields, "#[hdl] struct must use curly braces: {}");
+                FieldsNamed {
+                    brace_token: Brace(fields.paren_token.span),
+                    named: fields.unnamed,
+                }
+            }
+            syn::Fields::Unit => {
+                errors.error(&fields, "#[hdl] struct must use curly braces: {}");
+                FieldsNamed {
+                    brace_token: Brace(semi_token.unwrap_or_default().span),
+                    named: Punctuated::default(),
+                }
+            }
+        };
+        let mut field_flips = Vec::with_capacity(fields.named.len());
+        for (index, field) in fields.named.iter_mut().enumerate() {
+            field_flips.push(Self::parse_field(&mut errors, field, index));
+        }
+        let generics = if custom_bounds.is_some() {
+            MaybeParsed::Unrecognized(generics)
+        } else if let Some(generics) = errors.ok(ParsedGenerics::parse(&mut generics)) {
+            MaybeParsed::Parsed(generics)
+        } else {
+            MaybeParsed::Unrecognized(generics)
+        };
+        let fields = TypesParser::maybe_run(generics.as_ref(), fields, &mut errors);
+        errors.finish()?;
+        Ok(Self {
+            attrs,
+            options,
+            vis,
+            struct_token,
+            generics,
+            fields,
+            field_flips,
+            mask_type_ident: format_ident!("__{}__MaskType", ident),
+            mask_type_match_variant_ident: format_ident!("__{}__MaskType__MatchVariant", ident),
+            match_variant_ident: format_ident!("__{}__MatchVariant", ident),
+            mask_type_builder_ident: format_ident!("__{}__MaskType__Builder", ident),
+            builder_ident: format_ident!("__{}__Builder", ident),
+            ident,
+        })
+    }
+}
+
+#[derive(Clone, Debug)]
+struct Builder {
+    vis: Visibility,
+    struct_token: Token![struct],
+    ident: Ident,
+    target: Path,
+    generics: Generics,
+    fields: FieldsNamed,
+}
+
+#[derive(Copy, Clone, Eq, PartialEq, Debug)]
+enum BuilderFieldState {
+    Unfilled,
+    Generic,
+    Filled,
+}
+
+impl Builder {
+    fn phantom_field_name(&self) -> Ident {
+        format_ident!("__phantom", span = self.ident.span())
+    }
+    fn phantom_field(&self) -> Field {
+        let target = &self.target;
+        let type_generics = self.generics.split_for_impl().1;
+        Field {
+            attrs: vec![],
+            vis: Visibility::Inherited,
+            mutability: FieldMutability::None,
+            ident: Some(self.phantom_field_name()),
+            colon_token: Some(Token![:](self.ident.span())),
+            ty: parse_quote_spanned! {self.ident.span()=>
+                ::fayalite::__std::marker::PhantomData<#target #type_generics>
+            },
+        }
+    }
+    fn builder_struct_generics(
+        &self,
+        mut get_field_state: impl FnMut(usize) -> BuilderFieldState,
+    ) -> Generics {
+        let mut retval = self.generics.clone();
+        for param in retval.params.iter_mut() {
+            match param {
+                GenericParam::Lifetime(_) => {}
+                GenericParam::Type(param) => param.default = None,
+                GenericParam::Const(param) => param.default = None,
+            }
+        }
+        for (field_index, field) in self.fields.named.iter().enumerate() {
+            match get_field_state(field_index) {
+                BuilderFieldState::Unfilled | BuilderFieldState::Filled => continue,
+                BuilderFieldState::Generic => {}
+            }
+            if !retval.params.empty_or_trailing() {
+                retval.params.push_punct(Token![,](self.ident.span()));
+            }
+            retval.params.push_value(GenericParam::Type(
+                type_var_for_field_name(field.ident.as_ref().unwrap()).into(),
+            ));
+        }
+        retval
+    }
+    fn builder_struct_ty(
+        &self,
+        mut get_field_state: impl FnMut(usize) -> BuilderFieldState,
+    ) -> Type {
+        let mut ty_arguments: AngleBracketedGenericArguments = if self.generics.params.is_empty() {
+            parse_quote_spanned! {self.ident.span()=>
+                <>
+            }
+        } else {
+            let builder_type_generics = self.generics.split_for_impl().1;
+            parse_quote! { #builder_type_generics }
+        };
+        for (field_index, Field { ident, ty, .. }) in self.fields.named.iter().enumerate() {
+            let ident = ident.as_ref().unwrap();
+            if !ty_arguments.args.empty_or_trailing() {
+                ty_arguments.args.push_punct(Token![,](self.ident.span()));
+            }
+            ty_arguments
+                .args
+                .push_value(match get_field_state(field_index) {
+                    BuilderFieldState::Unfilled => parse_quote_spanned! {self.ident.span()=>
+                        ::fayalite::bundle::Unfilled<#ty>
+                    },
+                    BuilderFieldState::Generic => {
+                        let type_var = type_var_for_field_name(ident);
+                        parse_quote_spanned! {self.ident.span()=>
+                            #type_var
+                        }
+                    }
+                    BuilderFieldState::Filled => parse_quote_spanned! {self.ident.span()=>
+                        ::fayalite::expr::Expr<#ty>
+                    },
+                });
+        }
+        let ident = &self.ident;
+        parse_quote_spanned! {ident.span()=>
+            #ident #ty_arguments
+        }
+    }
+}
+
+fn type_var_for_field_name(ident: &Ident) -> Ident {
+    format_ident!("__T_{}", ident)
+}
+
+fn field_fn_for_field_name(ident: &Ident) -> Ident {
+    format_ident!("field_{}", ident)
+}
+
+impl ToTokens for Builder {
+    fn to_tokens(&self, tokens: &mut TokenStream) {
+        let Self {
+            vis,
+            struct_token,
+            ident,
+            target,
+            generics: _,
+            fields,
+        } = self;
+        let phantom_field_name = self.phantom_field_name();
+        let builder_struct = ItemStruct {
+            attrs: vec![parse_quote_spanned! {ident.span()=>
+                #[allow(non_camel_case_types, dead_code)]
+            }],
+            vis: vis.clone(),
+            struct_token: *struct_token,
+            ident: ident.clone(),
+            generics: self.builder_struct_generics(|_| BuilderFieldState::Generic),
+            fields: Fields::Named(FieldsNamed {
+                brace_token: fields.brace_token,
+                named: Punctuated::from_iter(
+                    [Pair::Punctuated(
+                        self.phantom_field(),
+                        Token![,](self.ident.span()),
+                    )]
+                    .into_iter()
+                    .chain(fields.named.pairs().map_pair_value_ref(|field| {
+                        let ident = field.ident.as_ref().unwrap();
+                        let type_var = type_var_for_field_name(ident);
+                        Field {
+                            vis: Visibility::Inherited,
+                            ty: parse_quote_spanned! {ident.span()=>
+                                #type_var
+                            },
+                            ..field.clone()
+                        }
+                    })),
+                ),
+            }),
+            semi_token: None,
+        };
+        builder_struct.to_tokens(tokens);
+        let field_idents = Vec::from_iter(
+            self.fields
+                .named
+                .iter()
+                .map(|field| field.ident.as_ref().unwrap()),
+        );
+        for (
+            field_index,
+            Field {
+                vis,
+                ident: field_ident,
+                ty,
+                ..
+            },
+        ) in self.fields.named.iter().enumerate()
+        {
+            let field_ident = field_ident.as_ref().unwrap();
+            let fn_ident = field_fn_for_field_name(field_ident);
+            let fn_generics = self.builder_struct_generics(|i| {
+                if i == field_index {
+                    BuilderFieldState::Unfilled
+                } else {
+                    BuilderFieldState::Generic
+                }
+            });
+            let (impl_generics, _, where_clause) = fn_generics.split_for_impl();
+            let unfilled_ty = self.builder_struct_ty(|i| {
+                if i == field_index {
+                    BuilderFieldState::Unfilled
+                } else {
+                    BuilderFieldState::Generic
+                }
+            });
+            let filled_ty = self.builder_struct_ty(|i| {
+                if i == field_index {
+                    BuilderFieldState::Filled
+                } else {
+                    BuilderFieldState::Generic
+                }
+            });
+            let pat_fields =
+                Vec::from_iter(self.fields.named.iter().enumerate().map(|(i, field)| {
+                    let field_ident = field.ident.as_ref().unwrap();
+                    if field_index == i {
+                        quote_spanned! {self.ident.span()=>
+                            #field_ident: _,
+                        }
+                    } else {
+                        quote_spanned! {self.ident.span()=>
+                            #field_ident,
+                        }
+                    }
+                }));
+            quote_spanned! {self.ident.span()=>
+                #[automatically_derived]
+                #[allow(non_camel_case_types, dead_code)]
+                impl #impl_generics #unfilled_ty
+                #where_clause
+                {
+                    #vis fn #fn_ident(
+                        self,
+                        #field_ident: impl ::fayalite::expr::ToExpr<Type = #ty>,
+                    ) -> #filled_ty {
+                        let Self {
+                            #phantom_field_name: _,
+                            #(#pat_fields)*
+                        } = self;
+                        let #field_ident = ::fayalite::expr::ToExpr::to_expr(&#field_ident);
+                        #ident {
+                            #phantom_field_name: ::fayalite::__std::marker::PhantomData,
+                            #(#field_idents,)*
+                        }
+                    }
+                }
+            }
+            .to_tokens(tokens);
+        }
+        let unfilled_generics = self.builder_struct_generics(|_| BuilderFieldState::Unfilled);
+        let unfilled_ty = self.builder_struct_ty(|_| BuilderFieldState::Unfilled);
+        let (unfilled_impl_generics, _, unfilled_where_clause) = unfilled_generics.split_for_impl();
+        quote_spanned! {self.ident.span()=>
+            #[automatically_derived]
+            #[allow(non_camel_case_types, dead_code)]
+            impl #unfilled_impl_generics ::fayalite::__std::default::Default for #unfilled_ty
+            #unfilled_where_clause
+            {
+                fn default() -> Self {
+                    #ident {
+                        #phantom_field_name: ::fayalite::__std::marker::PhantomData,
+                        #(#field_idents: ::fayalite::__std::default::Default::default(),)*
+                    }
+                }
+            }
+        }
+        .to_tokens(tokens);
+        let filled_generics = self.builder_struct_generics(|_| BuilderFieldState::Filled);
+        let filled_ty = self.builder_struct_ty(|_| BuilderFieldState::Filled);
+        let (filled_impl_generics, _, filled_where_clause) = filled_generics.split_for_impl();
+        let type_generics = self.generics.split_for_impl().1;
+        quote_spanned! {self.ident.span()=>
+            #[automatically_derived]
+            #[allow(non_camel_case_types, dead_code)]
+            impl #filled_impl_generics ::fayalite::expr::ToExpr for #filled_ty
+            #filled_where_clause
+            {
+                type Type = #target #type_generics;
+                fn to_expr(
+                    &self,
+                ) -> ::fayalite::expr::Expr<<Self as ::fayalite::expr::ToExpr>::Type> {
+                    let __ty = #target {
+                        #(#field_idents: ::fayalite::expr::Expr::ty(self.#field_idents),)*
+                    };
+                    let __field_values = [
+                        #(::fayalite::expr::Expr::canonical(self.#field_idents),)*
+                    ];
+                    ::fayalite::expr::ToExpr::to_expr(
+                        &::fayalite::expr::ops::BundleLiteral::new(
+                            __ty,
+                            ::fayalite::intern::Intern::intern(&__field_values[..]),
+                        ),
+                    )
+                }
+            }
+        }
+        .to_tokens(tokens);
+    }
+}
+
+impl ToTokens for ParsedBundle {
+    fn to_tokens(&self, tokens: &mut TokenStream) {
+        let Self {
+            attrs,
+            options,
+            vis,
+            struct_token,
+            ident,
+            generics,
+            fields,
+            field_flips,
+            mask_type_ident,
+            mask_type_match_variant_ident,
+            match_variant_ident,
+            builder_ident,
+            mask_type_builder_ident,
+        } = self;
+        let ItemOptions {
+            outline_generated: _,
+            target,
+            custom_bounds: _,
+            no_static,
+            no_runtime_generics,
+        } = &options.body;
+        let target = get_target(target, ident);
+        let mut item_attrs = attrs.clone();
+        item_attrs.push(common_derives(ident.span()));
+        ItemStruct {
+            attrs: item_attrs,
+            vis: vis.clone(),
+            struct_token: *struct_token,
+            ident: ident.clone(),
+            generics: generics.into(),
+            fields: Fields::Named(fields.clone().into()),
+            semi_token: None,
+        }
+        .to_tokens(tokens);
+        let (impl_generics, type_generics, where_clause) = generics.split_for_impl();
+        if let (MaybeParsed::Parsed(generics), MaybeParsed::Parsed(fields), None) =
+            (generics, fields, no_runtime_generics)
+        {
+            generics.make_runtime_generics(tokens, vis, ident, &target, |context| {
+                let fields: Vec<_> = fields
+                    .named
+                    .iter()
+                    .map(|ParsedField { ident, ty, .. }| {
+                        let ident = ident.as_ref().unwrap();
+                        let expr = ty.make_hdl_type_expr(context);
+                        quote_spanned! {ident.span()=>
+                            #ident: #expr,
+                        }
+                    })
+                    .collect();
+                parse_quote_spanned! {ident.span()=>
+                    #target {
+                        #(#fields)*
+                    }
+                }
+            })
+        }
+        let mut wrapped_in_const = WrappedInConst::new(tokens, ident.span());
+        let tokens = wrapped_in_const.inner();
+        let builder = Builder {
+            vis: vis.clone(),
+            struct_token: *struct_token,
+            ident: builder_ident.clone(),
+            target: target.clone(),
+            generics: generics.into(),
+            fields: fields.clone().into(),
+        };
+        builder.to_tokens(tokens);
+        let unfilled_builder_ty = builder.builder_struct_ty(|_| BuilderFieldState::Unfilled);
+        let filled_builder_ty = builder.builder_struct_ty(|_| BuilderFieldState::Filled);
+        let mut mask_type_fields = FieldsNamed::from(fields.clone());
+        for Field { ident, ty, .. } in &mut mask_type_fields.named {
+            let ident = ident.as_ref().unwrap();
+            *ty = parse_quote_spanned! {ident.span()=>
+                <#ty as ::fayalite::ty::Type>::MaskType
+            };
+        }
+        let mask_type_builder = Builder {
+            vis: vis.clone(),
+            struct_token: *struct_token,
+            ident: mask_type_builder_ident.clone(),
+            target: mask_type_ident.clone().into(),
+            generics: generics.into(),
+            fields: mask_type_fields.clone(),
+        };
+        mask_type_builder.to_tokens(tokens);
+        let unfilled_mask_type_builder_ty =
+            mask_type_builder.builder_struct_ty(|_| BuilderFieldState::Unfilled);
+        let filled_mask_type_builder_ty =
+            mask_type_builder.builder_struct_ty(|_| BuilderFieldState::Filled);
+        ItemStruct {
+            attrs: vec![
+                common_derives(ident.span()),
+                parse_quote_spanned! {ident.span()=>
+                    #[allow(non_camel_case_types, dead_code)]
+                },
+            ],
+            vis: vis.clone(),
+            struct_token: *struct_token,
+            ident: mask_type_ident.clone(),
+            generics: generics.into(),
+            fields: Fields::Named(mask_type_fields.clone()),
+            semi_token: None,
+        }
+        .to_tokens(tokens);
+        let mut mask_type_match_variant_fields = mask_type_fields;
+        for Field { ident, ty, .. } in &mut mask_type_match_variant_fields.named {
+            let ident = ident.as_ref().unwrap();
+            *ty = parse_quote_spanned! {ident.span()=>
+                ::fayalite::expr::Expr<#ty>
+            };
+        }
+        ItemStruct {
+            attrs: vec![
+                common_derives(ident.span()),
+                parse_quote_spanned! {ident.span()=>
+                    #[allow(non_camel_case_types, dead_code)]
+                },
+            ],
+            vis: vis.clone(),
+            struct_token: *struct_token,
+            ident: mask_type_match_variant_ident.clone(),
+            generics: generics.into(),
+            fields: Fields::Named(mask_type_match_variant_fields),
+            semi_token: None,
+        }
+        .to_tokens(tokens);
+        let mut match_variant_fields = FieldsNamed::from(fields.clone());
+        for Field { ident, ty, .. } in &mut match_variant_fields.named {
+            let ident = ident.as_ref().unwrap();
+            *ty = parse_quote_spanned! {ident.span()=>
+                ::fayalite::expr::Expr<#ty>
+            };
+        }
+        ItemStruct {
+            attrs: vec![
+                common_derives(ident.span()),
+                parse_quote_spanned! {ident.span()=>
+                    #[allow(non_camel_case_types, dead_code)]
+                },
+            ],
+            vis: vis.clone(),
+            struct_token: *struct_token,
+            ident: match_variant_ident.clone(),
+            generics: generics.into(),
+            fields: Fields::Named(match_variant_fields),
+            semi_token: None,
+        }
+        .to_tokens(tokens);
+        let match_variant_body_fields = Vec::from_iter(fields.named().into_iter().map(|field| {
+            let ident: &Ident = field.ident().as_ref().unwrap();
+            let ident_str = ident.to_string();
+            quote_spanned! {ident.span()=>
+                #ident: ::fayalite::expr::Expr::field(__this, #ident_str),
+            }
+        }));
+        let mask_type_body_fields = Vec::from_iter(fields.named().into_iter().map(|field| {
+            let ident: &Ident = field.ident().as_ref().unwrap();
+            quote_spanned! {ident.span()=>
+                #ident: ::fayalite::ty::Type::mask_type(&self.#ident),
+            }
+        }));
+        let from_canonical_body_fields =
+            Vec::from_iter(fields.named().into_iter().enumerate().zip(field_flips).map(
+                |((index, field), flip)| {
+                    let ident: &Ident = field.ident().as_ref().unwrap();
+                    let ident_str = ident.to_string();
+                    let flipped = flip.is_some();
+                    quote_spanned! {ident.span()=>
+                        #ident: {
+                            let ::fayalite::bundle::BundleField {
+                                name: __name,
+                                flipped: __flipped,
+                                ty: __ty,
+                            } = __fields[#index];
+                            ::fayalite::__std::assert_eq!(&*__name, #ident_str);
+                            ::fayalite::__std::assert_eq!(__flipped, #flipped);
+                            ::fayalite::ty::Type::from_canonical(__ty)
+                        },
+                    }
+                },
+            ));
+        let fields_body_fields = Vec::from_iter(fields.named().into_iter().zip(field_flips).map(
+            |(field, flip)| {
+                let ident: &Ident = field.ident().as_ref().unwrap();
+                let ident_str = ident.to_string();
+                let flipped = flip.is_some();
+                quote_spanned! {ident.span()=>
+                    ::fayalite::bundle::BundleField {
+                        name: ::fayalite::intern::Intern::intern(#ident_str),
+                        flipped: #flipped,
+                        ty: ::fayalite::ty::Type::canonical(&self.#ident),
+                    },
+                }
+            },
+        ));
+        let fields_len = fields.named().into_iter().len();
+        quote_spanned! {ident.span()=>
+            #[automatically_derived]
+            impl #impl_generics ::fayalite::ty::Type for #mask_type_ident #type_generics
+            #where_clause
+            {
+                type BaseType = ::fayalite::bundle::Bundle;
+                type MaskType = #mask_type_ident #type_generics;
+                type MatchVariant = #mask_type_match_variant_ident #type_generics;
+                type MatchActiveScope = ();
+                type MatchVariantAndInactiveScope = ::fayalite::ty::MatchVariantWithoutScope<
+                    <Self as ::fayalite::ty::Type>::MatchVariant,
+                >;
+                type MatchVariantsIter = ::fayalite::__std::iter::Once<
+                    <Self as ::fayalite::ty::Type>::MatchVariantAndInactiveScope,
+                >;
+                fn match_variants(
+                    __this: ::fayalite::expr::Expr<Self>,
+                    __source_location: ::fayalite::source_location::SourceLocation,
+                ) -> <Self as ::fayalite::ty::Type>::MatchVariantsIter {
+                    let __retval = #mask_type_match_variant_ident {
+                        #(#match_variant_body_fields)*
+                    };
+                    ::fayalite::__std::iter::once(::fayalite::ty::MatchVariantWithoutScope(__retval))
+                }
+                fn mask_type(&self) -> <Self as ::fayalite::ty::Type>::MaskType {
+                    *self
+                }
+                fn canonical(&self) -> ::fayalite::ty::CanonicalType {
+                    ::fayalite::ty::Type::canonical(&::fayalite::bundle::Bundle::new(::fayalite::bundle::BundleType::fields(self)))
+                }
+                #[track_caller]
+                fn from_canonical(__canonical_type: ::fayalite::ty::CanonicalType) -> Self {
+                    let ::fayalite::ty::CanonicalType::Bundle(__bundle) = __canonical_type else {
+                        ::fayalite::__std::panic!("expected bundle");
+                    };
+                    let __fields = ::fayalite::bundle::BundleType::fields(&__bundle);
+                    ::fayalite::__std::assert_eq!(__fields.len(), #fields_len, "bundle has wrong number of fields");
+                    Self {
+                        #(#from_canonical_body_fields)*
+                    }
+                }
+                fn source_location() -> ::fayalite::source_location::SourceLocation {
+                    ::fayalite::source_location::SourceLocation::caller()
+                }
+            }
+            #[automatically_derived]
+            impl #impl_generics ::fayalite::bundle::BundleType for #mask_type_ident #type_generics
+            #where_clause
+            {
+                type Builder = #unfilled_mask_type_builder_ty;
+                type FilledBuilder = #filled_mask_type_builder_ty;
+                fn fields(&self) -> ::fayalite::intern::Interned<[::fayalite::bundle::BundleField]> {
+                    ::fayalite::intern::Intern::intern(&[#(#fields_body_fields)*][..])
+                }
+            }
+            impl #impl_generics #mask_type_ident #type_generics
+            #where_clause
+            {
+                #vis fn __bundle_builder() -> #unfilled_mask_type_builder_ty {
+                    ::fayalite::__std::default::Default::default()
+                }
+            }
+            #[automatically_derived]
+            impl #impl_generics ::fayalite::ty::TypeWithDeref for #mask_type_ident #type_generics
+            #where_clause
+            {
+                fn expr_deref(__this: &::fayalite::expr::Expr<Self>) -> &<Self as ::fayalite::ty::Type>::MatchVariant {
+                    let __this = *__this;
+                    let __retval = #mask_type_match_variant_ident {
+                        #(#match_variant_body_fields)*
+                    };
+                    ::fayalite::intern::Interned::<_>::into_inner(::fayalite::intern::Intern::intern_sized(__retval))
+                }
+            }
+            #[automatically_derived]
+            impl #impl_generics ::fayalite::ty::Type for #target #type_generics
+            #where_clause
+            {
+                type BaseType = ::fayalite::bundle::Bundle;
+                type MaskType = #mask_type_ident #type_generics;
+                type MatchVariant = #match_variant_ident #type_generics;
+                type MatchActiveScope = ();
+                type MatchVariantAndInactiveScope = ::fayalite::ty::MatchVariantWithoutScope<
+                    <Self as ::fayalite::ty::Type>::MatchVariant,
+                >;
+                type MatchVariantsIter = ::fayalite::__std::iter::Once<
+                    <Self as ::fayalite::ty::Type>::MatchVariantAndInactiveScope,
+                >;
+                fn match_variants(
+                    __this: ::fayalite::expr::Expr<Self>,
+                    __source_location: ::fayalite::source_location::SourceLocation,
+                ) -> <Self as ::fayalite::ty::Type>::MatchVariantsIter {
+                    let __retval = #match_variant_ident {
+                        #(#match_variant_body_fields)*
+                    };
+                    ::fayalite::__std::iter::once(::fayalite::ty::MatchVariantWithoutScope(__retval))
+                }
+                fn mask_type(&self) -> <Self as ::fayalite::ty::Type>::MaskType {
+                    #mask_type_ident {
+                        #(#mask_type_body_fields)*
+                    }
+                }
+                fn canonical(&self) -> ::fayalite::ty::CanonicalType {
+                    ::fayalite::ty::Type::canonical(&::fayalite::bundle::Bundle::new(::fayalite::bundle::BundleType::fields(self)))
+                }
+                #[track_caller]
+                fn from_canonical(__canonical_type: ::fayalite::ty::CanonicalType) -> Self {
+                    let ::fayalite::ty::CanonicalType::Bundle(__bundle) = __canonical_type else {
+                        ::fayalite::__std::panic!("expected bundle");
+                    };
+                    let __fields = ::fayalite::bundle::BundleType::fields(&__bundle);
+                    ::fayalite::__std::assert_eq!(__fields.len(), #fields_len, "bundle has wrong number of fields");
+                    Self {
+                        #(#from_canonical_body_fields)*
+                    }
+                }
+                fn source_location() -> ::fayalite::source_location::SourceLocation {
+                    ::fayalite::source_location::SourceLocation::caller()
+                }
+            }
+            #[automatically_derived]
+            impl #impl_generics ::fayalite::bundle::BundleType for #target #type_generics
+            #where_clause
+            {
+                type Builder = #unfilled_builder_ty;
+                type FilledBuilder = #filled_builder_ty;
+                fn fields(&self) -> ::fayalite::intern::Interned<[::fayalite::bundle::BundleField]> {
+                    ::fayalite::intern::Intern::intern(&[#(#fields_body_fields)*][..])
+                }
+            }
+            impl #impl_generics #target #type_generics
+            #where_clause
+            {
+                #vis fn __bundle_builder() -> #unfilled_builder_ty {
+                    ::fayalite::__std::default::Default::default()
+                }
+            }
+            #[automatically_derived]
+            impl #impl_generics ::fayalite::ty::TypeWithDeref for #target #type_generics
+            #where_clause
+            {
+                fn expr_deref(__this: &::fayalite::expr::Expr<Self>) -> &<Self as ::fayalite::ty::Type>::MatchVariant {
+                    let __this = *__this;
+                    let __retval = #match_variant_ident {
+                        #(#match_variant_body_fields)*
+                    };
+                    ::fayalite::intern::Interned::<_>::into_inner(::fayalite::intern::Intern::intern_sized(__retval))
+                }
+            }
+        }
+        .to_tokens(tokens);
+        if let (None, MaybeParsed::Parsed(generics)) = (no_static, &self.generics) {
+            let static_generics = generics.clone().for_static_type();
+            let (static_impl_generics, static_type_generics, static_where_clause) =
+                static_generics.split_for_impl();
+            let static_type_body_fields = Vec::from_iter(fields.named().into_iter().map(|field| {
+                let ident: &Ident = field.ident().as_ref().unwrap();
+                let ty = field.ty();
+                quote_spanned! {ident.span()=>
+                    #ident: <#ty as ::fayalite::ty::StaticType>::TYPE,
+                }
+            }));
+            let static_mask_type_body_fields =
+                Vec::from_iter(fields.named().into_iter().map(|field| {
+                    let ident: &Ident = field.ident().as_ref().unwrap();
+                    let ty = field.ty();
+                    quote_spanned! {ident.span()=>
+                        #ident: <#ty as ::fayalite::ty::StaticType>::MASK_TYPE,
+                    }
+                }));
+            let type_properties = format_ident!("__type_properties", span = ident.span());
+            let type_properties_fields = Vec::from_iter(fields.named().into_iter().zip(field_flips).map(|(field, field_flip)| {
+                let ident: &Ident = field.ident().as_ref().unwrap();
+                let flipped = field_flip.is_some();
+                let ty = field.ty();
+                quote_spanned! {ident.span()=>
+                    let #type_properties = #type_properties.field(#flipped, <#ty as ::fayalite::ty::StaticType>::TYPE_PROPERTIES);
+                }
+            }));
+            let type_properties_mask_fields = Vec::from_iter(fields.named().into_iter().zip(field_flips).map(|(field, field_flip)| {
+                let ident: &Ident = field.ident().as_ref().unwrap();
+                let flipped = field_flip.is_some();
+                let ty = field.ty();
+                quote_spanned! {ident.span()=>
+                    let #type_properties = #type_properties.field(#flipped, <#ty as ::fayalite::ty::StaticType>::MASK_TYPE_PROPERTIES);
+                }
+            }));
+            quote_spanned! {ident.span()=>
+                #[automatically_derived]
+                impl #static_impl_generics ::fayalite::ty::StaticType for #mask_type_ident #static_type_generics
+                #static_where_clause
+                {
+                    const TYPE: Self = Self {
+                        #(#static_mask_type_body_fields)*
+                    };
+                    const MASK_TYPE: <Self as ::fayalite::ty::Type>::MaskType = Self {
+                        #(#static_mask_type_body_fields)*
+                    };
+                    const TYPE_PROPERTIES: ::fayalite::ty::TypeProperties = {
+                        let #type_properties = ::fayalite::bundle::BundleTypePropertiesBuilder::new();
+                        #(#type_properties_mask_fields)*
+                        #type_properties.finish()
+                    };
+                    const MASK_TYPE_PROPERTIES: ::fayalite::ty::TypeProperties = {
+                        let #type_properties = ::fayalite::bundle::BundleTypePropertiesBuilder::new();
+                        #(#type_properties_mask_fields)*
+                        #type_properties.finish()
+                    };
+                }
+                #[automatically_derived]
+                impl #static_impl_generics ::fayalite::ty::StaticType for #target #static_type_generics
+                #static_where_clause
+                {
+                    const TYPE: Self = Self {
+                        #(#static_type_body_fields)*
+                    };
+                    const MASK_TYPE: <Self as ::fayalite::ty::Type>::MaskType = #mask_type_ident {
+                        #(#static_mask_type_body_fields)*
+                    };
+                    const TYPE_PROPERTIES: ::fayalite::ty::TypeProperties = {
+                        let #type_properties = ::fayalite::bundle::BundleTypePropertiesBuilder::new();
+                        #(#type_properties_fields)*
+                        #type_properties.finish()
+                    };
+                    const MASK_TYPE_PROPERTIES: ::fayalite::ty::TypeProperties = {
+                        let #type_properties = ::fayalite::bundle::BundleTypePropertiesBuilder::new();
+                        #(#type_properties_mask_fields)*
+                        #type_properties.finish()
+                    };
+                }
+            }
+            .to_tokens(tokens);
+        }
+    }
+}
+
+pub(crate) fn hdl_bundle(item: ItemStruct) -> syn::Result<TokenStream> {
+    let item = ParsedBundle::parse(item)?;
+    let outline_generated = item.options.body.outline_generated;
+    let mut contents = item.to_token_stream();
+    if outline_generated.is_some() {
+        contents = crate::outline_generated(contents, "hdl-bundle-");
+    }
+    Ok(contents)
+}

crates/fayalite-proc-macros-impl/src/hdl_enum.rs

@@ -0,0 +1,656 @@
+use crate::{
+    hdl_type_common::{
+        common_derives, get_target, ItemOptions, MakeHdlTypeExpr, MaybeParsed, ParsedGenerics,
+        ParsedType, SplitForImpl, TypesParser, WrappedInConst,
+    },
+    Errors, HdlAttr, PairsIterExt,
+};
+use proc_macro2::TokenStream;
+use quote::{format_ident, quote_spanned, ToTokens};
+use syn::{
+    parse_quote_spanned,
+    punctuated::{Pair, Punctuated},
+    token::{Brace, Paren},
+    Attribute, Field, FieldMutability, Fields, FieldsNamed, FieldsUnnamed, Generics, Ident,
+    ItemEnum, ItemStruct, Token, Type, Variant, Visibility,
+};
+
+crate::options! {
+    #[options = VariantOptions]
+    pub(crate) enum VariantOption {}
+}
+
+crate::options! {
+    #[options = FieldOptions]
+    pub(crate) enum FieldOption {}
+}
+
+#[derive(Clone, Debug)]
+pub(crate) struct ParsedVariantField {
+    pub(crate) paren_token: Paren,
+    pub(crate) attrs: Vec<Attribute>,
+    pub(crate) options: HdlAttr<FieldOptions>,
+    pub(crate) ty: MaybeParsed<ParsedType, Type>,
+    pub(crate) comma_token: Option<Token![,]>,
+}
+
+#[derive(Clone, Debug)]
+pub(crate) struct ParsedVariant {
+    pub(crate) attrs: Vec<Attribute>,
+    pub(crate) options: HdlAttr<VariantOptions>,
+    pub(crate) ident: Ident,
+    pub(crate) field: Option<ParsedVariantField>,
+}
+
+impl ParsedVariant {
+    fn parse(
+        errors: &mut Errors,
+        variant: Variant,
+        generics: &MaybeParsed<ParsedGenerics, Generics>,
+    ) -> Self {
+        let Variant {
+            mut attrs,
+            ident,
+            fields,
+            discriminant,
+        } = variant;
+        let options = errors
+            .unwrap_or_default(HdlAttr::parse_and_take_attr(&mut attrs))
+            .unwrap_or_default();
+        let field = match fields {
+            Fields::Unnamed(FieldsUnnamed {
+                paren_token,
+                unnamed,
+            }) if unnamed.len() == 1 => {
+                let (field, comma_token) = unnamed.into_pairs().next().unwrap().into_tuple();
+                let Field {
+                    mut attrs,
+                    vis,
+                    mutability,
+                    ident: _,
+                    colon_token: _,
+                    ty,
+                } = field;
+                let options = errors
+                    .unwrap_or_default(HdlAttr::parse_and_take_attr(&mut attrs))
+                    .unwrap_or_default();
+                if !matches!(vis, Visibility::Inherited) {
+                    errors.error(
+                        &vis,
+                        "enum variant fields must not have a visibility specifier",
+                    );
+                }
+                if !matches!(mutability, FieldMutability::None) {
+                    // FIXME: use mutability as the spanned tokens,
+                    // blocked on https://github.com/dtolnay/syn/issues/1717
+                    errors.error(&ty, "field mutability is not supported");
+                }
+                Some(ParsedVariantField {
+                    paren_token,
+                    attrs,
+                    options,
+                    ty: TypesParser::maybe_run(generics.as_ref(), ty, errors),
+                    comma_token,
+                })
+            }
+            Fields::Unit => None,
+            Fields::Unnamed(fields) if fields.unnamed.is_empty() => None,
+            Fields::Named(fields) if fields.named.is_empty() => None,
+            Fields::Unnamed(_) | Fields::Named(_) => {
+                errors.error(
+                    fields,
+                    "enum variant must either have no fields or a single parenthesized field",
+                );
+                None
+            }
+        };
+        if let Some((eq, _)) = discriminant {
+            errors.error(eq, "custom enum discriminants are not allowed");
+        }
+        Self {
+            attrs,
+            options,
+            ident,
+            field,
+        }
+    }
+}
+
+#[derive(Clone, Debug)]
+pub(crate) struct ParsedEnum {
+    pub(crate) attrs: Vec<Attribute>,
+    pub(crate) options: HdlAttr<ItemOptions>,
+    pub(crate) vis: Visibility,
+    pub(crate) enum_token: Token![enum],
+    pub(crate) ident: Ident,
+    pub(crate) generics: MaybeParsed<ParsedGenerics, Generics>,
+    pub(crate) brace_token: Brace,
+    pub(crate) variants: Punctuated<ParsedVariant, Token![,]>,
+    pub(crate) match_variant_ident: Ident,
+}
+
+impl ParsedEnum {
+    fn parse(item: ItemEnum) -> syn::Result<Self> {
+        let ItemEnum {
+            mut attrs,
+            vis,
+            enum_token,
+            ident,
+            mut generics,
+            brace_token,
+            variants,
+        } = item;
+        let mut errors = Errors::new();
+        let mut options = errors
+            .unwrap_or_default(HdlAttr::<ItemOptions>::parse_and_take_attr(&mut attrs))
+            .unwrap_or_default();
+        errors.ok(options.body.validate());
+        let ItemOptions {
+            outline_generated: _,
+            target: _,
+            custom_bounds,
+            no_static: _,
+            no_runtime_generics: _,
+        } = options.body;
+        attrs.retain(|attr| {
+            if attr.path().is_ident("repr") {
+                errors.error(attr, "#[repr] is not supported on #[hdl] enums");
+                false
+            } else {
+                true
+            }
+        });
+        let generics = if custom_bounds.is_some() {
+            MaybeParsed::Unrecognized(generics)
+        } else if let Some(generics) = errors.ok(ParsedGenerics::parse(&mut generics)) {
+            MaybeParsed::Parsed(generics)
+        } else {
+            MaybeParsed::Unrecognized(generics)
+        };
+        let variants = Punctuated::from_iter(
+            variants
+                .into_pairs()
+                .map_pair_value(|v| ParsedVariant::parse(&mut errors, v, &generics)),
+        );
+        errors.finish()?;
+        Ok(Self {
+            attrs,
+            options,
+            vis,
+            enum_token,
+            generics,
+            brace_token,
+            variants,
+            match_variant_ident: format_ident!("__{}__MatchVariant", ident),
+            ident,
+        })
+    }
+}
+
+impl ToTokens for ParsedEnum {
+    fn to_tokens(&self, tokens: &mut TokenStream) {
+        let Self {
+            attrs,
+            options,
+            vis,
+            enum_token,
+            ident,
+            generics,
+            brace_token,
+            variants,
+            match_variant_ident,
+        } = self;
+        let ItemOptions {
+            outline_generated: _,
+            target,
+            custom_bounds: _,
+            no_static,
+            no_runtime_generics,
+        } = &options.body;
+        let target = get_target(target, ident);
+        let mut struct_attrs = attrs.clone();
+        struct_attrs.push(common_derives(ident.span()));
+        struct_attrs.push(parse_quote_spanned! {ident.span()=>
+            #[allow(non_snake_case)]
+        });
+        let struct_fields = Punctuated::from_iter(variants.pairs().map_pair_value_ref(
+            |ParsedVariant {
+                 attrs: _,
+                 options,
+                 ident,
+                 field,
+             }| {
+                let VariantOptions {} = options.body;
+                let colon_token;
+                let ty = if let Some(ParsedVariantField {
+                    paren_token,
+                    attrs: _,
+                    options,
+                    ty,
+                    comma_token: _,
+                }) = field
+                {
+                    let FieldOptions {} = options.body;
+                    colon_token = Token![:](paren_token.span.open());
+                    ty.clone().into()
+                } else {
+                    colon_token = Token![:](ident.span());
+                    parse_quote_spanned! {ident.span()=>
+                        ()
+                    }
+                };
+                Field {
+                    attrs: vec![],
+                    vis: vis.clone(),
+                    mutability: FieldMutability::None,
+                    ident: Some(ident.clone()),
+                    colon_token: Some(colon_token),
+                    ty,
+                }
+            },
+        ));
+        ItemStruct {
+            attrs: struct_attrs,
+            vis: vis.clone(),
+            struct_token: Token![struct](enum_token.span),
+            ident: ident.clone(),
+            generics: generics.into(),
+            fields: if struct_fields.is_empty() {
+                Fields::Unit
+            } else {
+                Fields::Named(FieldsNamed {
+                    brace_token: *brace_token,
+                    named: struct_fields,
+                })
+            },
+            semi_token: None,
+        }
+        .to_tokens(tokens);
+        let (impl_generics, type_generics, where_clause) = generics.split_for_impl();
+        if let (MaybeParsed::Parsed(generics), None) = (generics, no_runtime_generics) {
+            generics.make_runtime_generics(tokens, vis, ident, &target, |context| {
+                let fields: Vec<_> = variants
+                    .iter()
+                    .map(|ParsedVariant { ident, field, .. }| {
+                        if let Some(ParsedVariantField {
+                            ty: MaybeParsed::Parsed(ty),
+                            ..
+                        }) = field
+                        {
+                            let expr = ty.make_hdl_type_expr(context);
+                            quote_spanned! {ident.span()=>
+                                #ident: #expr,
+                            }
+                        } else {
+                            quote_spanned! {ident.span()=>
+                                #ident: (),
+                            }
+                        }
+                    })
+                    .collect();
+                parse_quote_spanned! {ident.span()=>
+                    #target {
+                        #(#fields)*
+                    }
+                }
+            })
+        }
+        let mut wrapped_in_const = WrappedInConst::new(tokens, ident.span());
+        let tokens = wrapped_in_const.inner();
+        {
+            let mut wrapped_in_const = WrappedInConst::new(tokens, ident.span());
+            let tokens = wrapped_in_const.inner();
+            let mut enum_attrs = attrs.clone();
+            enum_attrs.push(parse_quote_spanned! {ident.span()=>
+                #[allow(dead_code)]
+            });
+            ItemEnum {
+                attrs: enum_attrs,
+                vis: vis.clone(),
+                enum_token: *enum_token,
+                ident: ident.clone(),
+                generics: generics.into(),
+                brace_token: *brace_token,
+                variants: Punctuated::from_iter(variants.pairs().map_pair_value_ref(
+                    |ParsedVariant {
+                         attrs,
+                         options: _,
+                         ident,
+                         field,
+                     }| Variant {
+                        attrs: attrs.clone(),
+                        ident: ident.clone(),
+                        fields: match field {
+                            Some(ParsedVariantField {
+                                paren_token,
+                                attrs,
+                                options: _,
+                                ty,
+                                comma_token,
+                            }) => Fields::Unnamed(FieldsUnnamed {
+                                paren_token: *paren_token,
+                                unnamed: Punctuated::from_iter([Pair::new(
+                                    Field {
+                                        attrs: attrs.clone(),
+                                        vis: Visibility::Inherited,
+                                        mutability: FieldMutability::None,
+                                        ident: None,
+                                        colon_token: None,
+                                        ty: ty.clone().into(),
+                                    },
+                                    *comma_token,
+                                )]),
+                            }),
+                            None => Fields::Unit,
+                        },
+                        discriminant: None,
+                    },
+                )),
+            }
+            .to_tokens(tokens);
+        }
+        let mut enum_attrs = attrs.clone();
+        enum_attrs.push(parse_quote_spanned! {ident.span()=>
+            #[allow(dead_code, non_camel_case_types)]
+        });
+        ItemEnum {
+            attrs: enum_attrs,
+            vis: vis.clone(),
+            enum_token: *enum_token,
+            ident: match_variant_ident.clone(),
+            generics: generics.into(),
+            brace_token: *brace_token,
+            variants: Punctuated::from_iter(variants.pairs().map_pair_value_ref(
+                |ParsedVariant {
+                     attrs,
+                     options: _,
+                     ident,
+                     field,
+                 }| Variant {
+                    attrs: attrs.clone(),
+                    ident: ident.clone(),
+                    fields: match field {
+                        Some(ParsedVariantField {
+                            paren_token,
+                            attrs,
+                            options: _,
+                            ty,
+                            comma_token,
+                        }) => Fields::Unnamed(FieldsUnnamed {
+                            paren_token: *paren_token,
+                            unnamed: Punctuated::from_iter([Pair::new(
+                                Field {
+                                    attrs: attrs.clone(),
+                                    vis: Visibility::Inherited,
+                                    mutability: FieldMutability::None,
+                                    ident: None,
+                                    colon_token: None,
+                                    ty: parse_quote_spanned! {ident.span()=>
+                                        ::fayalite::expr::Expr<#ty>
+                                    },
+                                },
+                                *comma_token,
+                            )]),
+                        }),
+                        None => Fields::Unit,
+                    },
+                    discriminant: None,
+                },
+            )),
+        }
+        .to_tokens(tokens);
+        for (index, ParsedVariant { ident, field, .. }) in variants.iter().enumerate() {
+            if let Some(ParsedVariantField { ty, .. }) = field {
+                quote_spanned! {ident.span()=>
+                    #[automatically_derived]
+                    impl #impl_generics #target #type_generics
+                    #where_clause
+                    {
+                        #[allow(non_snake_case, dead_code)]
+                        #vis fn #ident<__V: ::fayalite::expr::ToExpr<Type = #ty>>(
+                            self,
+                            v: __V,
+                        ) -> ::fayalite::expr::Expr<Self> {
+                            ::fayalite::expr::ToExpr::to_expr(
+                                &::fayalite::expr::ops::EnumLiteral::new_by_index(
+                                    self,
+                                    #index,
+                                    ::fayalite::__std::option::Option::Some(
+                                        ::fayalite::expr::Expr::canonical(
+                                            ::fayalite::expr::ToExpr::to_expr(&v),
+                                        ),
+                                    ),
+                                ),
+                            )
+                        }
+                    }
+                }
+            } else {
+                quote_spanned! {ident.span()=>
+                    #[automatically_derived]
+                    impl #impl_generics #target #type_generics
+                    #where_clause
+                    {
+                        #[allow(non_snake_case, dead_code)]
+                        #vis fn #ident(self) -> ::fayalite::expr::Expr<Self> {
+                            ::fayalite::expr::ToExpr::to_expr(
+                                &::fayalite::expr::ops::EnumLiteral::new_by_index(
+                                    self,
+                                    #index,
+                                    ::fayalite::__std::option::Option::None,
+                                ),
+                            )
+                        }
+                    }
+                }
+            }
+            .to_tokens(tokens);
+        }
+        let from_canonical_body_fields = Vec::from_iter(variants.iter().enumerate().map(
+            |(index, ParsedVariant { ident, field, .. })| {
+                let ident_str = ident.to_string();
+                let val = if field.is_some() {
+                    let missing_value_msg = format!("expected variant {ident} to have a field");
+                    quote_spanned! {ident.span()=>
+                        ::fayalite::ty::Type::from_canonical(ty.expect(#missing_value_msg))
+                    }
+                } else {
+                    quote_spanned! {ident.span()=>
+                        ::fayalite::__std::assert!(ty.is_none());
+                    }
+                };
+                quote_spanned! {ident.span()=>
+                    #ident: {
+                        let ::fayalite::enum_::EnumVariant {
+                            name,
+                            ty,
+                        } = variants[#index];
+                        ::fayalite::__std::assert_eq!(&*name, #ident_str);
+                        #val
+                    },
+                }
+            },
+        ));
+        let match_active_scope_match_arms = Vec::from_iter(variants.iter().enumerate().map(
+            |(index, ParsedVariant { ident, field, .. })| {
+                if field.is_some() {
+                    quote_spanned! {ident.span()=>
+                        #index => #match_variant_ident::#ident(
+                            ::fayalite::expr::ToExpr::to_expr(
+                                &::fayalite::expr::ops::VariantAccess::new_by_index(
+                                    variant_access.base(),
+                                    variant_access.variant_index(),
+                                ),
+                            ),
+                        ),
+                    }
+                } else {
+                    quote_spanned! {ident.span()=>
+                        #index => #match_variant_ident::#ident,
+                    }
+                }
+            },
+        ));
+        let variants_body_variants = Vec::from_iter(variants.iter().map(
+            |ParsedVariant {
+                 attrs: _,
+                 options,
+                 ident,
+                 field,
+             }| {
+                let VariantOptions {} = options.body;
+                let ident_str = ident.to_string();
+                match field {
+                    Some(ParsedVariantField { options, .. }) => {
+                        let FieldOptions {} = options.body;
+                        quote_spanned! {ident.span()=>
+                            ::fayalite::enum_::EnumVariant {
+                                name: ::fayalite::intern::Intern::intern(#ident_str),
+                                ty: ::fayalite::__std::option::Option::Some(
+                                    ::fayalite::ty::Type::canonical(&self.#ident),
+                                ),
+                            },
+                        }
+                    }
+                    None => quote_spanned! {ident.span()=>
+                        ::fayalite::enum_::EnumVariant {
+                            name: ::fayalite::intern::Intern::intern(#ident_str),
+                            ty: ::fayalite::__std::option::Option::None,
+                        },
+                    },
+                }
+            },
+        ));
+        let variants_len = variants.len();
+        quote_spanned! {ident.span()=>
+            #[automatically_derived]
+            impl #impl_generics ::fayalite::ty::Type for #target #type_generics
+            #where_clause
+            {
+                type BaseType = ::fayalite::enum_::Enum;
+                type MaskType = ::fayalite::int::Bool;
+                type MatchVariant = #match_variant_ident #type_generics;
+                type MatchActiveScope = ::fayalite::module::Scope;
+                type MatchVariantAndInactiveScope = ::fayalite::enum_::EnumMatchVariantAndInactiveScope<Self>;
+                type MatchVariantsIter = ::fayalite::enum_::EnumMatchVariantsIter<Self>;
+
+                fn match_variants(
+                    this: ::fayalite::expr::Expr<Self>,
+                    source_location: ::fayalite::source_location::SourceLocation,
+                ) -> <Self as ::fayalite::ty::Type>::MatchVariantsIter {
+                    ::fayalite::module::enum_match_variants_helper(this, source_location)
+                }
+                fn mask_type(&self) -> <Self as ::fayalite::ty::Type>::MaskType {
+                    ::fayalite::int::Bool
+                }
+                fn canonical(&self) -> ::fayalite::ty::CanonicalType {
+                    ::fayalite::ty::CanonicalType::Enum(::fayalite::enum_::Enum::new(::fayalite::enum_::EnumType::variants(self)))
+                }
+                #[track_caller]
+                #[allow(non_snake_case)]
+                fn from_canonical(canonical_type: ::fayalite::ty::CanonicalType) -> Self {
+                    let ::fayalite::ty::CanonicalType::Enum(enum_) = canonical_type else {
+                        ::fayalite::__std::panic!("expected enum");
+                    };
+                    let variants = ::fayalite::enum_::EnumType::variants(&enum_);
+                    ::fayalite::__std::assert_eq!(variants.len(), #variants_len, "enum has wrong number of variants");
+                    Self {
+                        #(#from_canonical_body_fields)*
+                    }
+                }
+                fn source_location() -> ::fayalite::source_location::SourceLocation {
+                    ::fayalite::source_location::SourceLocation::caller()
+                }
+            }
+            #[automatically_derived]
+            impl #impl_generics ::fayalite::enum_::EnumType for #target #type_generics
+            #where_clause
+            {
+                fn match_activate_scope(
+                    v: <Self as ::fayalite::ty::Type>::MatchVariantAndInactiveScope,
+                ) -> (<Self as ::fayalite::ty::Type>::MatchVariant, <Self as ::fayalite::ty::Type>::MatchActiveScope) {
+                    let (variant_access, scope) = v.activate();
+                    (
+                        match variant_access.variant_index() {
+                            #(#match_active_scope_match_arms)*
+                            #variants_len.. => ::fayalite::__std::panic!("invalid variant index"),
+                        },
+                        scope,
+                    )
+                }
+                fn variants(&self) -> ::fayalite::intern::Interned<[::fayalite::enum_::EnumVariant]> {
+                    ::fayalite::intern::Intern::intern(&[
+                        #(#variants_body_variants)*
+                    ][..])
+                }
+            }
+        }
+        .to_tokens(tokens);
+        if let (None, MaybeParsed::Parsed(generics)) = (no_static, &self.generics) {
+            let static_generics = generics.clone().for_static_type();
+            let (static_impl_generics, static_type_generics, static_where_clause) =
+                static_generics.split_for_impl();
+            let static_type_body_variants =
+                Vec::from_iter(variants.iter().map(|ParsedVariant { ident, field, .. }| {
+                    if let Some(_) = field {
+                        quote_spanned! {ident.span()=>
+                            #ident: ::fayalite::ty::StaticType::TYPE,
+                        }
+                    } else {
+                        quote_spanned! {ident.span()=>
+                            #ident: (),
+                        }
+                    }
+                }));
+            let type_properties = format_ident!("__type_properties", span = ident.span());
+            let type_properties_variants =
+                Vec::from_iter(variants.iter().map(|ParsedVariant { ident, field, .. }| {
+                    let variant = if let Some(ParsedVariantField { ty, .. }) = field {
+                        quote_spanned! {ident.span()=>
+                            ::fayalite::__std::option::Option::Some(
+                                <#ty as ::fayalite::ty::StaticType>::TYPE_PROPERTIES,
+                            )
+                        }
+                    } else {
+                        quote_spanned! {ident.span()=>
+                            ::fayalite::__std::option::Option::None
+                        }
+                    };
+                    quote_spanned! {ident.span()=>
+                        let #type_properties = #type_properties.variant(#variant);
+                    }
+                }));
+            quote_spanned! {ident.span()=>
+                #[automatically_derived]
+                impl #static_impl_generics ::fayalite::ty::StaticType
+                for #target #static_type_generics
+                #static_where_clause
+                {
+                    const TYPE: Self = Self {
+                        #(#static_type_body_variants)*
+                    };
+                    const MASK_TYPE: <Self as ::fayalite::ty::Type>::MaskType =
+                        ::fayalite::int::Bool;
+                    const TYPE_PROPERTIES: ::fayalite::ty::TypeProperties = {
+                        let #type_properties = ::fayalite::enum_::EnumTypePropertiesBuilder::new();
+                        #(#type_properties_variants)*
+                        #type_properties.finish()
+                    };
+                    const MASK_TYPE_PROPERTIES: ::fayalite::ty::TypeProperties =
+                        <::fayalite::int::Bool as ::fayalite::ty::StaticType>::TYPE_PROPERTIES;
+                }
+            }
+            .to_tokens(tokens);
+        }
+    }
+}
+
+pub(crate) fn hdl_enum(item: ItemEnum) -> syn::Result<TokenStream> {
+    let item = ParsedEnum::parse(item)?;
+    let outline_generated = item.options.body.outline_generated;
+    let mut contents = item.to_token_stream();
+    if outline_generated.is_some() {
+        contents = crate::outline_generated(contents, "hdl-enum-");
+    }
+    Ok(contents)
+}

crates/fayalite-proc-macros-impl/src/lib.rs

@@ -13,15 +13,15 @@ use syn::{
 };
 
 mod fold;
+mod hdl_bundle;
+mod hdl_enum;
+mod hdl_type_common;
 mod module;
-mod value_derive_common;
-mod value_derive_enum;
-mod value_derive_struct;
+//mod value_derive_common;
+//mod value_derive_struct;
 
 mod kw {
-    pub(crate) use syn::token::{
-        Enum as enum_, Extern as extern_, Static as static_, Struct as struct_, Where as where_,
-    };
+    pub(crate) use syn::token::Extern as extern_;
 
     macro_rules! custom_keyword {
         ($kw:ident) => {
@@ -43,6 +43,7 @@ mod kw {
 
     custom_keyword!(clock_domain);
     custom_keyword!(connect_inexact);
+    custom_keyword!(custom_bounds);
     custom_keyword!(flip);
     custom_keyword!(hdl);
     custom_keyword!(input);
@@ -52,6 +53,8 @@ mod kw {
     custom_keyword!(memory_array);
     custom_keyword!(memory_with_init);
     custom_keyword!(no_reset);
+    custom_keyword!(no_runtime_generics);
+    custom_keyword!(no_static);
     custom_keyword!(outline_generated);
     custom_keyword!(output);
     custom_keyword!(reg_builder);
@@ -519,6 +522,26 @@ macro_rules! impl_extra_traits_for_options {
     ) => {
         impl Copy for $option_enum_name {}
 
+        impl PartialEq for $option_enum_name {
+            fn eq(&self, other: &Self) -> bool {
+                self.cmp(other).is_eq()
+            }
+        }
+
+        impl Eq for $option_enum_name {}
+
+        impl PartialOrd for $option_enum_name {
+            fn partial_cmp(&self, other: &Self) -> Option<std::cmp::Ordering> {
+                Some(self.cmp(other))
+            }
+        }
+
+        impl Ord for $option_enum_name {
+            fn cmp(&self, other: &Self) -> std::cmp::Ordering {
+                self.variant().cmp(&other.variant())
+            }
+        }
+
         impl quote::IdentFragment for $option_enum_name {
             fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
                 let _ = f;
@@ -554,6 +577,66 @@ pub(crate) use impl_extra_traits_for_options;
 macro_rules! options {
     (
         #[options = $options_name:ident]
+        $($tt:tt)*
+    ) => {
+        crate::options! {
+            #[options = $options_name, punct = syn::Token![,], allow_duplicates = false]
+            $($tt)*
+        }
+    };
+    (
+        #[options = $options_name:ident, punct = $Punct:ty, allow_duplicates = true]
+        $(#[$($enum_meta:tt)*])*
+        $enum_vis:vis enum $option_enum_name:ident {
+            $($Variant:ident($key:ident $(, $value:ty)?),)*
+        }
+    ) => {
+        crate::options! {
+            #[options = $options_name, punct = $Punct, allow_duplicates = (true)]
+            $(#[$($enum_meta)*])*
+            $enum_vis enum $option_enum_name {
+                $($Variant($key $(, $value)?),)*
+            }
+        }
+
+        impl Extend<$option_enum_name> for $options_name {
+            fn extend<T: IntoIterator<Item = $option_enum_name>>(&mut self, iter: T) {
+                iter.into_iter().for_each(|v| match v {
+                    $($option_enum_name::$Variant(v) => {
+                        self.$key = Some(v);
+                    })*
+                });
+            }
+        }
+
+        impl FromIterator<$option_enum_name> for $options_name {
+            fn from_iter<T: IntoIterator<Item = $option_enum_name>>(iter: T) -> Self {
+                let mut retval = Self::default();
+                retval.extend(iter);
+                retval
+            }
+        }
+
+        impl Extend<$options_name> for $options_name {
+            fn extend<T: IntoIterator<Item = $options_name>>(&mut self, iter: T) {
+                iter.into_iter().for_each(|v| {
+                    $(if let Some(v) = v.$key {
+                        self.$key = Some(v);
+                    })*
+                });
+            }
+        }
+
+        impl FromIterator<$options_name> for $options_name {
+            fn from_iter<T: IntoIterator<Item = $options_name>>(iter: T) -> Self {
+                let mut retval = Self::default();
+                retval.extend(iter);
+                retval
+            }
+        }
+    };
+    (
+        #[options = $options_name:ident, punct = $Punct:ty, allow_duplicates = $allow_duplicates:expr]
         $(#[$($enum_meta:tt)*])*
         $enum_vis:vis enum $option_enum_name:ident {
             $($Variant:ident($key:ident $(, $value:ty)?),)*
@@ -567,8 +650,11 @@ macro_rules! options {
         }
 
         #[derive(Clone, Debug, Default)]
+        #[allow(non_snake_case)]
         $enum_vis struct $options_name {
-            $($enum_vis $key: Option<(crate::kw::$key, $(syn::token::Paren, $value)?)>,)*
+            $(
+                $enum_vis $key: Option<(crate::kw::$key, $(syn::token::Paren, $value)?)>,
+            )*
         }
 
         crate::fold::impl_fold! {
@@ -577,6 +663,43 @@ macro_rules! options {
             }
         }
 
+        const _: () = {
+            #[derive(Clone, Debug)]
+            $enum_vis struct Iter($enum_vis $options_name);
+
+            impl IntoIterator for $options_name {
+                type Item = $option_enum_name;
+                type IntoIter = Iter;
+
+                fn into_iter(self) -> Self::IntoIter {
+                    Iter(self)
+                }
+            }
+
+            impl Iterator for Iter {
+                type Item = $option_enum_name;
+
+                fn next(&mut self) -> Option<Self::Item> {
+                    $(
+                        if let Some(value) = self.0.$key.take() {
+                            return Some($option_enum_name::$Variant(value));
+                        }
+                    )*
+                    None
+                }
+
+                #[allow(unused_mut, unused_variables)]
+                fn fold<B, F: FnMut(B, Self::Item) -> B>(mut self, mut init: B, mut f: F) -> B {
+                    $(
+                        if let Some(value) = self.0.$key.take() {
+                            init = f(init, $option_enum_name::$Variant(value));
+                        }
+                    )*
+                    init
+                }
+            }
+        };
+
         impl syn::parse::Parse for $options_name {
             fn parse(input: syn::parse::ParseStream) -> syn::Result<Self> {
                 #![allow(unused_mut, unused_variables, unreachable_code)]
@@ -585,7 +708,7 @@ macro_rules! options {
                     let old_input = input.fork();
                     match input.parse::<$option_enum_name>()? {
                         $($option_enum_name::$Variant(v) => {
-                            if retval.$key.replace(v).is_some() {
+                            if retval.$key.replace(v).is_some() && !$allow_duplicates {
                                 return Err(old_input.error(concat!("duplicate ", stringify!($key), " option")));
                             }
                         })*
@@ -593,7 +716,7 @@ macro_rules! options {
                     if input.is_empty() {
                         break;
                     }
-                    input.parse::<syn::Token![,]>()?;
+                    input.parse::<$Punct>()?;
                 }
                 Ok(retval)
             }
@@ -602,7 +725,7 @@ macro_rules! options {
         impl quote::ToTokens for $options_name {
             #[allow(unused_mut, unused_variables, unused_assignments)]
             fn to_tokens(&self, tokens: &mut proc_macro2::TokenStream) {
-                let mut separator: Option<syn::Token![,]> = None;
+                let mut separator: Option<$Punct> = None;
                 $(if let Some(v) = &self.$key {
                     separator.to_tokens(tokens);
                     separator = Some(Default::default());
@@ -673,6 +796,20 @@ macro_rules! options {
                 }
             }
         }
+
+        impl $option_enum_name {
+            #[allow(dead_code)]
+            fn variant(&self) -> usize {
+                #[repr(usize)]
+                enum Variant {
+                    $($Variant,)*
+                    __Last, // so it doesn't complain about zero-variant enums
+                }
+                match *self {
+                    $(Self::$Variant(..) => Variant::$Variant as usize,)*
+                }
+            }
+        }
     };
 }
 
@@ -686,6 +823,15 @@ pub(crate) fn outline_generated(contents: TokenStream, prefix: &str) -> TokenStr
         .suffix(".tmp.rs")
         .tempfile_in(out_dir)
         .unwrap();
+    struct PrintOnPanic<'a>(&'a TokenStream);
+    impl Drop for PrintOnPanic<'_> {
+        fn drop(&mut self) {
+            if std::thread::panicking() {
+                println!("{}", self.0);
+            }
+        }
+    }
+    let _print_on_panic = PrintOnPanic(&contents);
     let contents = prettyplease::unparse(&parse_quote! { #contents });
     let hash = <sha2::Sha256 as sha2::Digest>::digest(&contents);
     let hash = base16ct::HexDisplay(&hash[..5]);
@@ -706,7 +852,7 @@ pub(crate) fn outline_generated(contents: TokenStream, prefix: &str) -> TokenStr
     }
 }
 
-pub fn module(attr: TokenStream, item: TokenStream) -> syn::Result<TokenStream> {
+pub fn hdl_module(attr: TokenStream, item: TokenStream) -> syn::Result<TokenStream> {
     let options = syn::parse2::<module::ConfigOptions>(attr)?;
     let options = HdlAttr::from(options);
     let func = syn::parse2::<module::ModuleFn>(quote! { #options #item })?;
@@ -717,14 +863,14 @@ pub fn module(attr: TokenStream, item: TokenStream) -> syn::Result<TokenStream>
     Ok(contents)
 }
 
-pub fn value_derive(item: TokenStream) -> syn::Result<TokenStream> {
-    let item = syn::parse2::<Item>(item)?;
+pub fn hdl_attr(attr: TokenStream, item: TokenStream) -> syn::Result<TokenStream> {
+    let item = syn::parse2::<Item>(quote! { #[hdl(#attr)] #item })?;
     match item {
-        Item::Enum(item) => value_derive_enum::value_derive_enum(item),
-        Item::Struct(item) => value_derive_struct::value_derive_struct(item),
+        Item::Enum(item) => hdl_enum::hdl_enum(item),
+        Item::Struct(item) => hdl_bundle::hdl_bundle(item),
         _ => Err(syn::Error::new(
             Span::call_site(),
-            "derive(Value) can only be used on structs or enums",
+            "top-level #[hdl] can only be used on structs or enums",
         )),
     }
 }

crates/fayalite-proc-macros-impl/src/module.rs

@@ -1,7 +1,7 @@
 // SPDX-License-Identifier: LGPL-3.0-or-later
 // See Notices.txt for copyright information
 use crate::{
-    is_hdl_attr,
+    hdl_type_common::{ParsedGenerics, SplitForImpl},
     module::transform_body::{HdlLet, HdlLetKindIO},
     options, Errors, HdlAttr, PairsIterExt,
 };
@@ -57,13 +57,6 @@ impl Visit<'_> for CheckNameConflictsWithModuleBuilderVisitor<'_> {
     }
 }
 
-fn retain_struct_attrs<F: FnMut(&Attribute) -> bool>(item: &mut ItemStruct, mut f: F) {
-    item.attrs.retain(&mut f);
-    for field in item.fields.iter_mut() {
-        field.attrs.retain(&mut f);
-    }
-}
-
 pub(crate) type ModuleIO = HdlLet<HdlLetKindIO>;
 
 pub(crate) struct ModuleFn {
@@ -74,7 +67,7 @@ pub(crate) struct ModuleFn {
     sig: Signature,
     block: Box<Block>,
     io: Vec<ModuleIO>,
-    struct_generics: Generics,
+    struct_generics: ParsedGenerics,
 }
 
 #[derive(Clone, Copy, PartialEq, Eq, Debug, Hash)]
@@ -220,8 +213,16 @@ impl Parse for ModuleFn {
                 "return type not allowed here",
             ));
         }
-        let body_results = errors.ok(transform_body::transform_body(module_kind, block));
+        let struct_generics = errors.ok(ParsedGenerics::parse(&mut { struct_generics }));
+        let body_results = struct_generics.as_ref().and_then(|struct_generics| {
+            errors.ok(transform_body::transform_body(
+                module_kind,
+                block,
+                struct_generics,
+            ))
+        });
         errors.finish()?;
+        let struct_generics = struct_generics.unwrap();
         let (block, io) = body_results.unwrap();
         Ok(Self {
             attrs,
@@ -273,19 +274,18 @@ impl ModuleFn {
                 });
                 name
             }));
-        let module_kind_ty = match module_kind {
-            ModuleKind::Extern => quote! { ::fayalite::module::ExternModule },
-            ModuleKind::Normal => quote! { ::fayalite::module::NormalModule },
+        let module_kind_value = match module_kind {
+            ModuleKind::Extern => quote! { ::fayalite::module::ModuleKind::Extern },
+            ModuleKind::Normal => quote! { ::fayalite::module::ModuleKind::Normal },
         };
         let fn_name = &outer_sig.ident;
         let (_struct_impl_generics, struct_type_generics, struct_where_clause) =
             struct_generics.split_for_impl();
         let struct_ty = quote! {#fn_name #struct_type_generics};
         body_sig.ident = parse_quote! {__body};
-        body_sig.inputs.insert(
-            0,
-            parse_quote! {m: &mut ::fayalite::module::ModuleBuilder<#struct_ty, #module_kind_ty>},
-        );
+        body_sig
+            .inputs
+            .insert(0, parse_quote! { m: &::fayalite::module::ModuleBuilder });
         let body_fn = ItemFn {
             attrs: vec![],
             vis: Visibility::Inherited,
@@ -310,34 +310,21 @@ impl ModuleFn {
         let body_turbofish_type_generics = body_type_generics.as_turbofish();
         let block = parse_quote! {{
             #body_fn
-            ::fayalite::module::ModuleBuilder::run(#fn_name_str, |m| __body #body_turbofish_type_generics(m, #(#param_names,)*))
+            ::fayalite::module::ModuleBuilder::run(
+                #fn_name_str,
+                #module_kind_value,
+                |m| __body #body_turbofish_type_generics(m, #(#param_names,)*),
+            )
         }};
-        let static_type = io.iter().all(|io| io.kind.ty_expr.is_none());
-        let struct_options = if static_type {
-            quote! { #[hdl(static)] }
-        } else {
-            quote! {}
-        };
         let the_struct: ItemStruct = parse_quote! {
-            #[derive(::fayalite::__std::clone::Clone,
-                ::fayalite::__std::hash::Hash,
-                ::fayalite::__std::cmp::PartialEq,
-                ::fayalite::__std::cmp::Eq,
-                ::fayalite::__std::fmt::Debug)]
             #[allow(non_camel_case_types)]
-            #struct_options
+            #[hdl(no_runtime_generics, no_static)]
             #vis struct #fn_name #struct_generics #struct_where_clause {
                 #(
                 #io_flips
                 #vis #io_names: #io_types,)*
             }
         };
-        let mut struct_without_hdl_attrs = the_struct.clone();
-        let mut struct_without_derives = the_struct;
-        retain_struct_attrs(&mut struct_without_hdl_attrs, |attr| !is_hdl_attr(attr));
-        retain_struct_attrs(&mut struct_without_derives, |attr| {
-            !attr.path().is_ident("derive")
-        });
         let outer_fn = ItemFn {
             attrs,
             vis,
@@ -345,10 +332,7 @@ impl ModuleFn {
             block,
         };
         let mut retval = outer_fn.into_token_stream();
-        struct_without_hdl_attrs.to_tokens(&mut retval);
-        retval.extend(
-            crate::value_derive_struct::value_derive_struct(struct_without_derives).unwrap(),
-        );
+        retval.extend(crate::hdl_bundle::hdl_bundle(the_struct).unwrap());
         retval
     }
 }

crates/fayalite-proc-macros-impl/src/module/transform_body.rs

@@ -2,11 +2,14 @@
 // See Notices.txt for copyright information
 use crate::{
     fold::{impl_fold, DoFold},
+    hdl_type_common::{
+        known_items, ParseFailed, ParseTypes, ParsedGenerics, ParsedType, TypesParser,
+    },
     is_hdl_attr, kw,
     module::{check_name_conflicts_with_module_builder, ModuleIO, ModuleIOKind, ModuleKind},
     options, Errors, HdlAttr,
 };
-use num_bigint::{BigInt, Sign};
+use num_bigint::BigInt;
 use proc_macro2::{Span, TokenStream};
 use quote::{quote, quote_spanned, ToTokens};
 use std::{borrow::Borrow, convert::Infallible};
@@ -87,9 +90,9 @@ macro_rules! with_debug_clone_and_fold {
 pub(crate) use with_debug_clone_and_fold;
 
 with_debug_clone_and_fold! {
-    pub(crate) struct HdlLetKindIO<Kind = ModuleIOKind> {
+    pub(crate) struct HdlLetKindIO<Kind = ModuleIOKind, Ty = ParsedType> {
         pub(crate) colon_token: Token![:],
-        pub(crate) ty: Box<Type>,
+        pub(crate) ty: Box<Ty>,
         pub(crate) m: kw::m,
         pub(crate) dot_token: Token![.],
         pub(crate) kind: Kind,
@@ -98,6 +101,32 @@ with_debug_clone_and_fold! {
     }
 }
 
+impl<Kind: Clone, T: ParseTypes<I>, I> ParseTypes<HdlLetKindIO<Kind, I>> for HdlLetKindIO<Kind, T> {
+    fn parse_types(
+        input: &mut HdlLetKindIO<Kind, I>,
+        parser: &mut TypesParser<'_>,
+    ) -> Result<Self, ParseFailed> {
+        let HdlLetKindIO {
+            colon_token,
+            ty,
+            m,
+            dot_token,
+            kind,
+            paren,
+            ty_expr,
+        } = input;
+        Ok(Self {
+            colon_token: *colon_token,
+            ty: ParseTypes::parse_types(ty, parser)?,
+            m: *m,
+            dot_token: *dot_token,
+            kind: kind.clone(),
+            paren: *paren,
+            ty_expr: ty_expr.clone(),
+        })
+    }
+}
+
 pub(crate) fn parse_single_fn_arg(input: ParseStream) -> syn::Result<Box<Expr>> {
     let retval = input.parse()?;
     let _: Option<Token![,]> = input.parse()?;
@@ -145,17 +174,19 @@ impl<Kind: ToTokens> HdlLetKindToTokens for HdlLetKindIO<Kind> {
 
 #[derive(Clone, Debug)]
 pub(crate) struct HdlLetKindInstance {
-    pub(crate) m: kw::m,
-    pub(crate) dot_token: Token![.],
     pub(crate) instance: kw::instance,
     pub(crate) paren: Paren,
     pub(crate) module: Box<Expr>,
 }
 
+impl ParseTypes<Self> for HdlLetKindInstance {
+    fn parse_types(input: &mut Self, _parser: &mut TypesParser<'_>) -> Result<Self, ParseFailed> {
+        Ok(input.clone())
+    }
+}
+
 impl_fold! {
     struct HdlLetKindInstance<> {
-        m: kw::m,
-        dot_token: Token![.],
         instance: kw::instance,
         paren: Paren,
         module: Box<Expr>,
@@ -167,14 +198,10 @@ impl HdlLetKindToTokens for HdlLetKindInstance {
 
     fn expr_to_tokens(&self, tokens: &mut TokenStream) {
         let Self {
-            m,
-            dot_token,
             instance,
             paren,
             module,
         } = self;
-        m.to_tokens(tokens);
-        dot_token.to_tokens(tokens);
         instance.to_tokens(tokens);
         paren.surround(tokens, |tokens| module.to_tokens(tokens));
     }
@@ -381,19 +408,21 @@ make_builder_method_enum! {
 #[derive(Clone, Debug)]
 pub(crate) struct HdlLetKindRegBuilder {
     pub(crate) ty: Option<(Token![:], Box<Type>)>,
-    pub(crate) m: kw::m,
-    pub(crate) dot_token: Token![.],
     pub(crate) reg_builder: kw::reg_builder,
     pub(crate) reg_builder_paren: Paren,
     pub(crate) clock_domain: Option<RegBuilderClockDomain>,
     pub(crate) reset: RegBuilderReset,
 }
 
+impl ParseTypes<Self> for HdlLetKindRegBuilder {
+    fn parse_types(input: &mut Self, _parser: &mut TypesParser<'_>) -> Result<Self, ParseFailed> {
+        Ok(input.clone())
+    }
+}
+
 impl_fold! {
     struct HdlLetKindRegBuilder<> {
         ty: Option<(Token![:], Box<Type>)>,
-        m: kw::m,
-        dot_token: Token![.],
         reg_builder: kw::reg_builder,
         reg_builder_paren: Paren,
         clock_domain: Option<RegBuilderClockDomain>,
@@ -406,10 +435,10 @@ impl HdlLetKindRegBuilder {
         input: ParseStream,
         parsed_ty: Option<(Token![:], Box<Type>)>,
         _after_ty: Token![=],
-        m: kw::m,
-        dot_token: Token![.],
+        m_dot: Option<(kw::m, Token![.])>,
         reg_builder: kw::reg_builder,
     ) -> syn::Result<Self> {
+        check_empty_m_dot(m_dot, reg_builder)?;
         let _reg_builder_paren_inner;
         let reg_builder_paren = parenthesized!(_reg_builder_paren_inner in input);
         let mut clock_domain = None;
@@ -430,8 +459,6 @@ impl HdlLetKindRegBuilder {
         }
         Ok(Self {
             ty: parsed_ty,
-            m,
-            dot_token,
             reg_builder,
             reg_builder_paren,
             clock_domain,
@@ -451,15 +478,11 @@ impl HdlLetKindToTokens for HdlLetKindRegBuilder {
     fn expr_to_tokens(&self, tokens: &mut TokenStream) {
         let Self {
             ty: _,
-            m,
-            dot_token,
             reg_builder,
             reg_builder_paren,
             clock_domain,
             reset,
         } = self;
-        m.to_tokens(tokens);
-        dot_token.to_tokens(tokens);
         reg_builder.to_tokens(tokens);
         reg_builder_paren.surround(tokens, |_tokens| {});
         clock_domain.to_tokens(tokens);
@@ -470,18 +493,20 @@ impl HdlLetKindToTokens for HdlLetKindRegBuilder {
 #[derive(Clone, Debug)]
 pub(crate) struct HdlLetKindWire {
     pub(crate) ty: Option<(Token![:], Box<Type>)>,
-    pub(crate) m: kw::m,
-    pub(crate) dot_token: Token![.],
     pub(crate) wire: kw::wire,
     pub(crate) paren: Paren,
     pub(crate) ty_expr: Option<Box<Expr>>,
 }
 
+impl ParseTypes<Self> for HdlLetKindWire {
+    fn parse_types(input: &mut Self, _parser: &mut TypesParser<'_>) -> Result<Self, ParseFailed> {
+        Ok(input.clone())
+    }
+}
+
 impl_fold! {
     struct HdlLetKindWire<> {
         ty: Option<(Token![:], Box<Type>)>,
-        m: kw::m,
-        dot_token: Token![.],
         wire: kw::wire,
         paren: Paren,
         ty_expr: Option<Box<Expr>>,
@@ -499,14 +524,10 @@ impl HdlLetKindToTokens for HdlLetKindWire {
     fn expr_to_tokens(&self, tokens: &mut TokenStream) {
         let Self {
             ty: _,
-            m,
-            dot_token,
             wire,
             paren,
             ty_expr,
         } = self;
-        m.to_tokens(tokens);
-        dot_token.to_tokens(tokens);
         wire.to_tokens(tokens);
         paren.surround(tokens, |tokens| ty_expr.to_tokens(tokens));
     }
@@ -627,16 +648,18 @@ impl ToTokens for MemoryFn {
 #[derive(Clone, Debug)]
 pub(crate) struct HdlLetKindMemory {
     pub(crate) ty: Option<(Token![:], Box<Type>)>,
-    pub(crate) m: kw::m,
-    pub(crate) dot_token: Token![.],
     pub(crate) memory_fn: MemoryFn,
 }
 
+impl ParseTypes<Self> for HdlLetKindMemory {
+    fn parse_types(input: &mut Self, _parser: &mut TypesParser<'_>) -> Result<Self, ParseFailed> {
+        Ok(input.clone())
+    }
+}
+
 impl_fold! {
     struct HdlLetKindMemory<> {
         ty: Option<(Token![:], Box<Type>)>,
-        m: kw::m,
-        dot_token: Token![.],
         memory_fn: MemoryFn,
     }
 }
@@ -650,14 +673,7 @@ impl HdlLetKindToTokens for HdlLetKindMemory {
     }
 
     fn expr_to_tokens(&self, tokens: &mut TokenStream) {
-        let Self {
-            ty: _,
-            m,
-            dot_token,
-            memory_fn,
-        } = self;
-        m.to_tokens(tokens);
-        dot_token.to_tokens(tokens);
+        let Self { ty: _, memory_fn } = self;
         memory_fn.to_tokens(tokens);
     }
 }
@@ -667,22 +683,20 @@ impl HdlLetKindMemory {
         input: ParseStream,
         parsed_ty: Option<(Token![:], Box<Type>)>,
         _after_ty: Token![=],
-        m: kw::m,
-        dot_token: Token![.],
+        m_dot: Option<(kw::m, Token![.])>,
         memory_fn_name: MemoryFnName,
     ) -> syn::Result<Self> {
+        check_empty_m_dot(m_dot, memory_fn_name)?;
         Ok(Self {
             ty: parsed_ty,
-            m,
-            dot_token,
             memory_fn: MemoryFn::parse_rest(input, memory_fn_name)?,
         })
     }
 }
 
 #[derive(Clone, Debug)]
-pub(crate) enum HdlLetKind {
-    IO(HdlLetKindIO),
+pub(crate) enum HdlLetKind<IOType = ParsedType> {
+    IO(HdlLetKindIO<ModuleIOKind, IOType>),
     Instance(HdlLetKindInstance),
     RegBuilder(HdlLetKindRegBuilder),
     Wire(HdlLetKindWire),
@@ -690,8 +704,8 @@ pub(crate) enum HdlLetKind {
 }
 
 impl_fold! {
-    enum HdlLetKind<> {
-        IO(HdlLetKindIO),
+    enum HdlLetKind<IOType,> {
+        IO(HdlLetKindIO<ModuleIOKind, IOType>),
         Instance(HdlLetKindInstance),
         RegBuilder(HdlLetKindRegBuilder),
         Wire(HdlLetKindWire),
@@ -699,6 +713,27 @@ impl_fold! {
     }
 }
 
+impl<T: ParseTypes<I>, I> ParseTypes<HdlLetKind<I>> for HdlLetKind<T> {
+    fn parse_types(
+        input: &mut HdlLetKind<I>,
+        parser: &mut TypesParser<'_>,
+    ) -> Result<Self, ParseFailed> {
+        match input {
+            HdlLetKind::IO(input) => ParseTypes::parse_types(input, parser).map(HdlLetKind::IO),
+            HdlLetKind::Instance(input) => {
+                ParseTypes::parse_types(input, parser).map(HdlLetKind::Instance)
+            }
+            HdlLetKind::RegBuilder(input) => {
+                ParseTypes::parse_types(input, parser).map(HdlLetKind::RegBuilder)
+            }
+            HdlLetKind::Wire(input) => ParseTypes::parse_types(input, parser).map(HdlLetKind::Wire),
+            HdlLetKind::Memory(input) => {
+                ParseTypes::parse_types(input, parser).map(HdlLetKind::Memory)
+            }
+        }
+    }
+}
+
 fn parsed_ty_or_err(
     parsed_ty: Option<(Token![:], Box<Type>)>,
     after_ty: Token![=],
@@ -710,15 +745,15 @@ fn parsed_ty_or_err(
     }
 }
 
-impl HdlLetKindIO {
+impl HdlLetKindIO<ModuleIOKind, Type> {
     fn rest_of_parse(
         input: ParseStream,
         parsed_ty: Option<(Token![:], Box<Type>)>,
         after_ty: Token![=],
-        m: kw::m,
-        dot_token: Token![.],
+        m_dot: Option<(kw::m, Token![.])>,
         kind: ModuleIOKind,
     ) -> syn::Result<Self> {
+        let (m, dot_token) = unwrap_m_dot(m_dot, kind)?;
         let (colon_token, ty) = parsed_ty_or_err(parsed_ty, after_ty)?;
         let paren_contents;
         Ok(Self {
@@ -733,7 +768,36 @@ impl HdlLetKindIO {
     }
 }
 
-impl HdlLetKindParse for HdlLetKind {
+fn check_empty_m_dot(m_dot: Option<(kw::m, Token![.])>, kind: impl ToTokens) -> syn::Result<()> {
+    if let Some((m, dot_token)) = m_dot {
+        Err(Error::new_spanned(
+            quote! {#m #dot_token #kind},
+            format_args!(
+                "{} is a free function, not a method of ModuleBuilder: try removing the `m.`",
+                kind.to_token_stream()
+            ),
+        ))
+    } else {
+        Ok(())
+    }
+}
+
+fn unwrap_m_dot(
+    m_dot: Option<(kw::m, Token![.])>,
+    kind: impl ToTokens,
+) -> syn::Result<(kw::m, Token![.])> {
+    m_dot.ok_or_else(|| {
+        Error::new_spanned(
+            &kind,
+            format_args!(
+                "{} is a ModuleBuilder method, not a free function: try prefixing it with `m.`",
+                kind.to_token_stream()
+            ),
+        )
+    })
+}
+
+impl HdlLetKindParse for HdlLetKind<Type> {
     type ParsedTy = Option<(Token![:], Box<Type>)>;
 
     fn parse_ty(input: ParseStream) -> syn::Result<Self::ParsedTy> {
@@ -753,16 +817,20 @@ impl HdlLetKindParse for HdlLetKind {
         after_ty: Token![=],
         input: ParseStream,
     ) -> syn::Result<Self> {
+        let m_dot = if input.peek(kw::m) && input.peek2(Token![.]) {
             let m = input.parse()?;
             let dot_token = input.parse()?;
+            Some((m, dot_token))
+        } else {
+            None
+        };
         let kind: LetFnKind = input.parse()?;
         match kind {
             LetFnKind::Input(input_token) => HdlLetKindIO::rest_of_parse(
                 input,
                 parsed_ty,
                 after_ty,
-                m,
-                dot_token,
+                m_dot,
                 ModuleIOKind::Input(input_token),
             )
             .map(Self::IO),
@@ -770,8 +838,7 @@ impl HdlLetKindParse for HdlLetKind {
                 input,
                 parsed_ty,
                 after_ty,
-                m,
-                dot_token,
+                m_dot,
                 ModuleIOKind::Output(output),
             )
             .map(Self::IO),
@@ -782,30 +849,23 @@ impl HdlLetKindParse for HdlLetKind {
                         "type annotation not allowed for instance",
                     ));
                 }
+                check_empty_m_dot(m_dot, kind)?;
                 let paren_contents;
                 Ok(Self::Instance(HdlLetKindInstance {
-                    m,
-                    dot_token,
                     instance,
                     paren: parenthesized!(paren_contents in input),
                     module: paren_contents.call(parse_single_fn_arg)?,
                 }))
             }
-            LetFnKind::RegBuilder((reg_builder,)) => HdlLetKindRegBuilder::rest_of_parse(
-                input,
-                parsed_ty,
-                after_ty,
-                m,
-                dot_token,
-                reg_builder,
-            )
-            .map(Self::RegBuilder),
+            LetFnKind::RegBuilder((reg_builder,)) => {
+                HdlLetKindRegBuilder::rest_of_parse(input, parsed_ty, after_ty, m_dot, reg_builder)
+                    .map(Self::RegBuilder)
+            }
             LetFnKind::Wire((wire,)) => {
+                check_empty_m_dot(m_dot, wire)?;
                 let paren_contents;
                 Ok(Self::Wire(HdlLetKindWire {
                     ty: parsed_ty,
-                    m,
-                    dot_token,
                     wire,
                     paren: parenthesized!(paren_contents in input),
                     ty_expr: paren_contents.call(parse_optional_fn_arg)?,
@@ -815,8 +875,7 @@ impl HdlLetKindParse for HdlLetKind {
                 input,
                 parsed_ty,
                 after_ty,
-                m,
-                dot_token,
+                m_dot,
                 MemoryFnName::Memory(fn_name),
             )
             .map(Self::Memory),
@@ -824,8 +883,7 @@ impl HdlLetKindParse for HdlLetKind {
                 input,
                 parsed_ty,
                 after_ty,
-                m,
-                dot_token,
+                m_dot,
                 MemoryFnName::MemoryArray(fn_name),
             )
             .map(Self::Memory),
@@ -833,8 +891,7 @@ impl HdlLetKindParse for HdlLetKind {
                 input,
                 parsed_ty,
                 after_ty,
-                m,
-                dot_token,
+                m_dot,
                 MemoryFnName::MemoryWithInit(fn_name),
             )
             .map(Self::Memory),
@@ -878,6 +935,34 @@ with_debug_clone_and_fold! {
     }
 }
 
+impl<T: ParseTypes<I>, I> ParseTypes<HdlLet<I>> for HdlLet<T> {
+    fn parse_types(
+        input: &mut HdlLet<I>,
+        parser: &mut TypesParser<'_>,
+    ) -> Result<Self, ParseFailed> {
+        let HdlLet {
+            attrs,
+            hdl_attr,
+            let_token,
+            mut_token,
+            name,
+            eq_token,
+            kind,
+            semi_token,
+        } = input;
+        Ok(Self {
+            attrs: attrs.clone(),
+            hdl_attr: hdl_attr.clone(),
+            let_token: *let_token,
+            mut_token: *mut_token,
+            name: name.clone(),
+            eq_token: *eq_token,
+            kind: T::parse_types(kind, parser)?,
+            semi_token: *semi_token,
+        })
+    }
+}
+
 impl<Kind> HdlLet<Kind> {
     pub(crate) fn try_map<Kind2, E>(
         self,
@@ -1006,7 +1091,7 @@ fn wrap_ty_with_expr(ty: impl ToTokens) -> Type {
 fn unwrap_or_static_type(expr: Option<impl ToTokens>, span: Span) -> TokenStream {
     expr.map(ToTokens::into_token_stream).unwrap_or_else(|| {
         quote_spanned! {span=>
-            ::fayalite::ty::StaticType::static_type()
+            ::fayalite::ty::StaticType::TYPE
         }
     })
 }
@@ -1026,14 +1111,15 @@ impl<T: ToString> ToTokens for ImplicitName<T> {
     }
 }
 
-struct Visitor {
+struct Visitor<'a> {
     module_kind: ModuleKind,
     errors: Errors,
     io: Vec<ModuleIO>,
     block_depth: usize,
+    parsed_generics: &'a ParsedGenerics,
 }
 
-impl Visitor {
+impl Visitor<'_> {
     fn take_hdl_attr<T: Parse>(&mut self, attrs: &mut Vec<Attribute>) -> Option<HdlAttr<T>> {
         self.errors.unwrap_or(
             HdlAttr::parse_and_take_attr(attrs),
@@ -1086,7 +1172,7 @@ impl Visitor {
             parse_quote_spanned! {if_token.span=>
                 #(#attrs)*
                 {
-                    let mut __scope = m.if_(#cond);
+                    let mut __scope = ::fayalite::module::if_(#cond);
                     let _: () = #then_branch;
                     let mut __scope = __scope.else_();
                     let _: () = #else_expr;
@@ -1096,7 +1182,7 @@ impl Visitor {
             parse_quote_spanned! {if_token.span=>
                 #(#attrs)*
                 {
-                    let mut __scope = m.if_(#cond);
+                    let mut __scope = ::fayalite::module::if_(#cond);
                     let _: () = #then_branch;
                 }
             }
@@ -1157,8 +1243,6 @@ impl Visitor {
             eq_token,
             kind:
                 HdlLetKindInstance {
-                    m,
-                    dot_token,
                     instance,
                     paren,
                     module,
@@ -1166,7 +1250,7 @@ impl Visitor {
             semi_token,
         } = hdl_let;
         self.require_normal_module(instance);
-        let mut expr = quote! {#m #dot_token #instance};
+        let mut expr = instance.to_token_stream();
         paren.surround(&mut expr, |expr| {
             let name_str = ImplicitName {
                 name: &name,
@@ -1191,11 +1275,9 @@ impl Visitor {
     }
     fn process_hdl_let_reg_builder(&mut self, hdl_let: HdlLet<HdlLetKindRegBuilder>) -> Local {
         let name = &hdl_let.name;
-        let m = hdl_let.kind.m;
-        let dot = hdl_let.kind.dot_token;
         let reg_builder = hdl_let.kind.reg_builder;
         self.require_normal_module(reg_builder);
-        let mut expr = quote! {#m #dot #reg_builder};
+        let mut expr = reg_builder.to_token_stream();
         hdl_let.kind.reg_builder_paren.surround(&mut expr, |expr| {
             let name_str = ImplicitName {
                 name,
@@ -1244,12 +1326,10 @@ impl Visitor {
     }
     fn process_hdl_let_wire(&mut self, hdl_let: HdlLet<HdlLetKindWire>) -> Local {
         let name = &hdl_let.name;
-        let m = hdl_let.kind.m;
-        let dot = hdl_let.kind.dot_token;
         let wire = hdl_let.kind.wire;
         self.require_normal_module(wire);
         let ty_expr = unwrap_or_static_type(hdl_let.kind.ty_expr.as_ref(), wire.span());
-        let mut expr = quote! {#m #dot #wire};
+        let mut expr = wire.to_token_stream();
         hdl_let.kind.paren.surround(&mut expr, |expr| {
             let name_str = ImplicitName {
                 name,
@@ -1279,18 +1359,19 @@ impl Visitor {
     }
     fn process_hdl_let_memory(&mut self, hdl_let: HdlLet<HdlLetKindMemory>) -> Local {
         let name = &hdl_let.name;
-        let m = hdl_let.kind.m;
-        let dot = hdl_let.kind.dot_token;
         let memory_fn = hdl_let.kind.memory_fn;
         let memory_fn_name = memory_fn.name();
         self.require_normal_module(memory_fn_name);
-        let mut expr = quote! {#m #dot #memory_fn_name};
+        let mut expr = memory_fn_name.to_token_stream();
         let (paren, arg) = match memory_fn {
             MemoryFn::Memory {
                 memory,
                 paren,
                 ty_expr,
-            } => (paren, unwrap_or_static_type(ty_expr.as_ref(), memory.span())),
+            } => (
+                paren,
+                unwrap_or_static_type(ty_expr.as_ref(), memory.span()),
+            ),
             MemoryFn::MemoryArray {
                 memory_array,
                 paren,
@@ -1377,16 +1458,17 @@ impl Visitor {
         let value: BigInt = self
             .errors
             .ok(base10_digits.parse().map_err(|e| Error::new(span, e)))?;
-        let (negative, bytes) = match value.sign() {
-            Sign::Minus => (true, value.magnitude().to_bytes_le()),
-            Sign::NoSign => (false, vec![]),
-            Sign::Plus => (false, value.magnitude().to_bytes_le()),
+        let bytes = value.to_signed_bytes_le();
+        let path = if signed {
+            known_items::SInt(span).path
+        } else {
+            known_items::UInt(span).path
         };
         Some(parse_quote_spanned! {span=>
-            ::fayalite::int::make_int_literal::<#signed, #width>(
-                #negative,
+            <#path<#width> as ::fayalite::int::BoolOrIntType>::le_bytes_to_expr_wrapping(
                 &[#(#bytes,)*],
-            ).to_int_expr()
+                #width,
+            )
         })
     }
     fn process_literal(&mut self, literal: ExprLit) -> Expr {
@@ -1449,7 +1531,7 @@ fn empty_let() -> Local {
     }
 }
 
-impl Fold for Visitor {
+impl Fold for Visitor<'_> {
     fn fold_item(&mut self, item: Item) -> Item {
         // don't process item interiors
         item
@@ -1536,11 +1618,16 @@ impl Fold for Visitor {
             Some(None) => return fold_local(self, let_stmt),
             Some(Some(HdlAttr { .. })) => {}
         };
-        let hdl_let = syn::parse2::<HdlLet>(let_stmt.into_token_stream());
+        let hdl_let = syn::parse2::<HdlLet<HdlLetKind<Type>>>(let_stmt.into_token_stream());
         let Some(hdl_let) = self.errors.ok(hdl_let) else {
             return empty_let();
         };
-        let hdl_let = hdl_let.do_fold(self);
+        let mut hdl_let = hdl_let.do_fold(self);
+        let Ok(hdl_let) =
+            TypesParser::run_with_errors(self.parsed_generics, &mut hdl_let, &mut self.errors)
+        else {
+            return empty_let();
+        };
         self.process_hdl_let(hdl_let)
     }
 
@@ -1563,12 +1650,14 @@ impl Fold for Visitor {
 pub(crate) fn transform_body(
     module_kind: ModuleKind,
     mut body: Box<Block>,
+    parsed_generics: &ParsedGenerics,
 ) -> syn::Result<(Box<Block>, Vec<ModuleIO>)> {
     let mut visitor = Visitor {
         module_kind,
         errors: Errors::new(),
         io: vec![],
         block_depth: 0,
+        parsed_generics,
     };
     *body = syn::fold::fold_block(&mut visitor, *body);
     visitor.errors.finish()?;

crates/fayalite-proc-macros-impl/src/module/transform_body/expand_aggregate_literals.rs

@@ -1,6 +1,6 @@
 // SPDX-License-Identifier: LGPL-3.0-or-later
 // See Notices.txt for copyright information
-use crate::{module::transform_body::Visitor, options, Errors, HdlAttr, PairsIterExt};
+use crate::{module::transform_body::Visitor, Errors, HdlAttr, PairsIterExt};
 use proc_macro2::{Span, TokenStream};
 use quote::{format_ident, quote_spanned, ToTokens, TokenStreamExt};
 use syn::{
@@ -13,15 +13,6 @@ use syn::{
     FieldValue, Ident, Index, Member, Path, PathArguments, PathSegment, Token, TypePath,
 };
 
-options! {
-    #[options = AggregateLiteralOptions]
-    #[no_ident_fragment]
-    pub(crate) enum AggregateLiteralOption {
-        Struct(struct_),
-        Enum(enum_),
-    }
-}
-
 #[derive(Clone, Debug)]
 pub(crate) struct StructOrEnumPath {
     pub(crate) ty: TypePath,
@@ -79,11 +70,7 @@ impl StructOrEnumPath {
             },
         ]
     };
-    pub(crate) fn new(
-        errors: &mut Errors,
-        path: TypePath,
-        options: &AggregateLiteralOptions,
-    ) -> Result<Self, ()> {
+    pub(crate) fn new(errors: &mut Errors, path: TypePath) -> Result<Self, ()> {
         let Path {
             leading_colon,
             segments,
@@ -95,18 +82,6 @@ impl StructOrEnumPath {
             None
         };
         let enum_type = 'guess_enum_type: {
-            if options.enum_.is_some() {
-                if let Some((struct_,)) = options.struct_ {
-                    errors.error(
-                        struct_,
-                        "can't specify both #[hdl(enum)] and #[hdl(struct)]",
-                    );
-                }
-                break 'guess_enum_type Some(None);
-            }
-            if options.struct_.is_some() {
-                break 'guess_enum_type None;
-            }
             if path.qself.is_none() && leading_colon.is_none() && segments.len() == 1 {
                 let PathSegment { ident, arguments } = &segments[0];
                 for &SingleSegmentVariant {
@@ -330,7 +305,7 @@ impl ToTokens for StructOrEnumLiteral {
     }
 }
 
-impl Visitor {
+impl Visitor<'_> {
     pub(crate) fn process_hdl_array(
         &mut self,
         hdl_attr: HdlAttr<Nothing>,
@@ -358,7 +333,7 @@ impl Visitor {
     }
     pub(crate) fn process_struct_enum(
         &mut self,
-        hdl_attr: HdlAttr<AggregateLiteralOptions>,
+        hdl_attr: HdlAttr<Nothing>,
         mut literal: StructOrEnumLiteral,
     ) -> Expr {
         let span = hdl_attr.hdl.span;
@@ -384,7 +359,7 @@ impl Visitor {
             parse_quote! { #field_var }
         });
         let Ok(StructOrEnumPath { ty, variant }) =
-            StructOrEnumPath::new(&mut self.errors, literal.path.clone(), &hdl_attr.body)
+            StructOrEnumPath::new(&mut self.errors, literal.path.clone())
         else {
             return parse_quote_spanned! {span=>
                 {}
@@ -445,11 +420,59 @@ impl Visitor {
     }
     pub(crate) fn process_hdl_struct(
         &mut self,
-        hdl_attr: HdlAttr<AggregateLiteralOptions>,
+        hdl_attr: HdlAttr<Nothing>,
         expr_struct: ExprStruct,
     ) -> Expr {
         self.require_normal_module(&hdl_attr);
-        self.process_struct_enum(hdl_attr, expr_struct.into())
+        let name_span = expr_struct.path.segments.last().unwrap().ident.span();
+        let builder_ident = format_ident!("__builder", span = name_span);
+        let empty_builder = if expr_struct.qself.is_some()
+            || expr_struct
+                .path
+                .segments
+                .iter()
+                .any(|seg| !seg.arguments.is_none())
+        {
+            let ty = TypePath {
+                qself: expr_struct.qself,
+                path: expr_struct.path,
+            };
+            let builder_ty = quote_spanned! {name_span=>
+                <#ty as ::fayalite::bundle::BundleType>::Builder
+            };
+            quote_spanned! {name_span=>
+                <#builder_ty as ::fayalite::__std::default::Default>::default()
+            }
+        } else {
+            let path = ExprPath {
+                attrs: vec![],
+                qself: expr_struct.qself,
+                path: expr_struct.path,
+            };
+            quote_spanned! {name_span=>
+                #path::__bundle_builder()
+            }
+        };
+        let field_calls = Vec::from_iter(expr_struct.fields.iter().map(
+            |FieldValue {
+                 attrs: _,
+                 member,
+                 colon_token: _,
+                 expr,
+             }| {
+                let field_fn = format_ident!("field_{}", member);
+                quote_spanned! {member.span()=>
+                    let #builder_ident = #builder_ident.#field_fn(#expr);
+                }
+            },
+        ));
+        parse_quote_spanned! {name_span=>
+            {
+                let #builder_ident = #empty_builder;
+                #(#field_calls)*
+                ::fayalite::expr::ToExpr::to_expr(&#builder_ident)
+            }
+        }
     }
     pub(crate) fn process_hdl_tuple(
         &mut self,
@@ -473,7 +496,7 @@ impl Visitor {
     }
     pub(crate) fn process_hdl_call(
         &mut self,
-        hdl_attr: HdlAttr<AggregateLiteralOptions>,
+        hdl_attr: HdlAttr<Nothing>,
         expr_call: ExprCall,
     ) -> Expr {
         self.require_normal_module(&hdl_attr);

crates/fayalite-proc-macros-impl/src/module/transform_body/expand_match.rs

@@ -3,8 +3,7 @@
 use crate::{
     fold::impl_fold,
     module::transform_body::{
-        expand_aggregate_literals::{AggregateLiteralOptions, StructOrEnumPath},
-        with_debug_clone_and_fold, Visitor,
+        expand_aggregate_literals::StructOrEnumPath, with_debug_clone_and_fold, Visitor,
     },
     Errors, HdlAttr, PairsIterExt,
 };
@@ -561,8 +560,7 @@ struct HdlMatchParseState<'a> {
 
 impl HdlMatchParseState<'_> {
     fn resolve_enum_struct_path(&mut self, path: TypePath) -> Result<Path, ()> {
-        let StructOrEnumPath { ty, variant } =
-            StructOrEnumPath::new(self.errors, path, &AggregateLiteralOptions::default())?;
+        let StructOrEnumPath { ty, variant } = StructOrEnumPath::new(self.errors, path)?;
         Ok(if let Some((_variant_path, variant_name)) = variant {
             parse_quote_spanned! {self.span=>
                 __MatchTy::<#ty>::#variant_name
@@ -575,7 +573,7 @@ impl HdlMatchParseState<'_> {
     }
 }
 
-impl Visitor {
+impl Visitor<'_> {
     pub(crate) fn process_hdl_match(
         &mut self,
         _hdl_attr: HdlAttr<Nothing>,

crates/fayalite-proc-macros-impl/src/value_derive_common.rs

@@ -1,761 +0,0 @@
-// SPDX-License-Identifier: LGPL-3.0-or-later
-// See Notices.txt for copyright information
-use crate::{fold::impl_fold, kw, Errors, HdlAttr};
-use proc_macro2::{Span, TokenStream};
-use quote::{format_ident, quote, quote_spanned, ToTokens};
-use std::collections::{BTreeMap, HashMap, HashSet};
-use syn::{
-    fold::{fold_generics, Fold},
-    parse::{Parse, ParseStream},
-    parse_quote, parse_quote_spanned,
-    punctuated::Punctuated,
-    spanned::Spanned,
-    token::{Brace, Paren, Where},
-    Block, ConstParam, Expr, Field, Fields, FieldsNamed, FieldsUnnamed, GenericParam, Generics,
-    Ident, Index, ItemImpl, Lifetime, LifetimeParam, Member, Path, Token, Type, TypeParam,
-    TypePath, Visibility, WhereClause, WherePredicate,
-};
-
-#[derive(Clone, Debug)]
-pub(crate) struct Bounds(pub(crate) Punctuated<WherePredicate, Token![,]>);
-
-impl_fold! {
-    struct Bounds<>(Punctuated<WherePredicate, Token![,]>);
-}
-
-impl Parse for Bounds {
-    fn parse(input: ParseStream) -> syn::Result<Self> {
-        Ok(Bounds(Punctuated::parse_terminated(input)?))
-    }
-}
-
-impl From<Option<WhereClause>> for Bounds {
-    fn from(value: Option<WhereClause>) -> Self {
-        Self(value.map_or_else(Punctuated::new, |v| v.predicates))
-    }
-}
-
-impl ToTokens for Bounds {
-    fn to_tokens(&self, tokens: &mut TokenStream) {
-        self.0.to_tokens(tokens)
-    }
-}
-
-#[derive(Debug, Clone)]
-pub(crate) struct ParsedField<O> {
-    pub(crate) options: HdlAttr<O>,
-    pub(crate) vis: Visibility,
-    pub(crate) name: Member,
-    pub(crate) ty: Type,
-}
-
-impl<O> ParsedField<O> {
-    pub(crate) fn var_name(&self) -> Ident {
-        format_ident!("__v_{}", self.name)
-    }
-}
-
-pub(crate) fn get_field_name(
-    index: usize,
-    name: Option<Ident>,
-    ty_span: impl FnOnce() -> Span,
-) -> Member {
-    match name {
-        Some(name) => Member::Named(name),
-        None => Member::Unnamed(Index {
-            index: index as _,
-            span: ty_span(),
-        }),
-    }
-}
-
-pub(crate) fn get_field_names(fields: &Fields) -> impl Iterator<Item = Member> + '_ {
-    fields
-        .iter()
-        .enumerate()
-        .map(|(index, field)| get_field_name(index, field.ident.clone(), || field.ty.span()))
-}
-
-impl<O: Parse + Default> ParsedField<O> {
-    pub(crate) fn parse_fields(
-        errors: &mut Errors,
-        fields: &mut Fields,
-        in_enum: bool,
-    ) -> (FieldsKind, Vec<ParsedField<O>>) {
-        let mut unit_fields = Punctuated::new();
-        let (fields_kind, fields) = match fields {
-            Fields::Named(fields) => (FieldsKind::Named(fields.brace_token), &mut fields.named),
-            Fields::Unnamed(fields) => {
-                (FieldsKind::Unnamed(fields.paren_token), &mut fields.unnamed)
-            }
-            Fields::Unit => (FieldsKind::Unit, &mut unit_fields),
-        };
-        let fields = fields
-            .iter_mut()
-            .enumerate()
-            .map(|(index, field)| {
-                let options = errors
-                    .unwrap_or_default(HdlAttr::parse_and_take_attr(&mut field.attrs))
-                    .unwrap_or_default();
-                let name = get_field_name(index, field.ident.clone(), || field.ty.span());
-                if in_enum && !matches!(field.vis, Visibility::Inherited) {
-                    errors.error(&field.vis, "field visibility not allowed in enums");
-                }
-                ParsedField {
-                    options,
-                    vis: field.vis.clone(),
-                    name,
-                    ty: field.ty.clone(),
-                }
-            })
-            .collect();
-        (fields_kind, fields)
-    }
-}
-
-#[derive(Copy, Clone, Debug)]
-pub(crate) enum FieldsKind {
-    Unit,
-    Named(Brace),
-    Unnamed(Paren),
-}
-
-impl FieldsKind {
-    pub(crate) fn into_fields_named(
-        brace_token: Brace,
-        fields: impl IntoIterator<Item = syn::Field>,
-    ) -> Fields {
-        Fields::Named(FieldsNamed {
-            brace_token,
-            named: Punctuated::from_iter(fields),
-        })
-    }
-    pub(crate) fn into_fields_unnamed(
-        paren_token: Paren,
-        fields: impl IntoIterator<Item = syn::Field>,
-    ) -> Fields {
-        Fields::Unnamed(FieldsUnnamed {
-            paren_token,
-            unnamed: Punctuated::from_iter(fields),
-        })
-    }
-    pub(crate) fn into_fields(self, fields: impl IntoIterator<Item = syn::Field>) -> Fields {
-        match self {
-            FieldsKind::Unit => {
-                let mut fields = fields.into_iter().peekable();
-                let Some(first_field) = fields.peek() else {
-                    return Fields::Unit;
-                };
-                if first_field.ident.is_some() {
-                    Self::into_fields_named(Default::default(), fields)
-                } else {
-                    Self::into_fields_unnamed(Default::default(), fields)
-                }
-            }
-            FieldsKind::Named(brace_token) => Self::into_fields_named(brace_token, fields),
-            FieldsKind::Unnamed(paren_token) => Self::into_fields_unnamed(paren_token, fields),
-        }
-    }
-}
-
-pub(crate) fn get_target(target: &Option<(kw::target, Paren, Path)>, item_ident: &Ident) -> Path {
-    match target {
-        Some((_, _, target)) => target.clone(),
-        None => item_ident.clone().into(),
-    }
-}
-
-pub(crate) struct ValueDeriveGenerics {
-    pub(crate) generics: Generics,
-    pub(crate) static_type_generics: Generics,
-}
-
-impl ValueDeriveGenerics {
-    pub(crate) fn get(mut generics: Generics, where_: &Option<(Where, Paren, Bounds)>) -> Self {
-        let mut static_type_generics = generics.clone();
-        if let Some((_, _, bounds)) = where_ {
-            generics
-                .make_where_clause()
-                .predicates
-                .extend(bounds.0.iter().cloned());
-            static_type_generics
-                .where_clause
-                .clone_from(&generics.where_clause);
-        } else {
-            let type_params = Vec::from_iter(generics.type_params().map(|v| v.ident.clone()));
-            let predicates = &mut generics.make_where_clause().predicates;
-            let static_type_predicates = &mut static_type_generics.make_where_clause().predicates;
-            for type_param in type_params {
-                predicates.push(parse_quote! {#type_param: ::fayalite::ty::Value<Type: ::fayalite::ty::Type<Value = #type_param>>});
-                static_type_predicates
-                    .push(parse_quote! {#type_param: ::fayalite::ty::StaticValue});
-            }
-        }
-        Self {
-            generics,
-            static_type_generics,
-        }
-    }
-}
-
-pub(crate) fn derive_clone_hash_eq_partialeq_for_struct<Name: ToTokens>(
-    the_struct_ident: &Ident,
-    generics: &Generics,
-    field_names: &[Name],
-) -> TokenStream {
-    let (impl_generics, type_generics, where_clause) = generics.split_for_impl();
-    quote! {
-        #[automatically_derived]
-        impl #impl_generics ::fayalite::__std::clone::Clone for #the_struct_ident #type_generics
-        #where_clause
-        {
-            fn clone(&self) -> Self {
-                Self {
-                    #(#field_names: ::fayalite::__std::clone::Clone::clone(&self.#field_names),)*
-                }
-            }
-        }
-
-        #[automatically_derived]
-        impl #impl_generics ::fayalite::__std::hash::Hash for #the_struct_ident #type_generics
-        #where_clause
-        {
-            #[allow(unused_variables)]
-            fn hash<__H: ::fayalite::__std::hash::Hasher>(&self, hasher: &mut __H) {
-                #(::fayalite::__std::hash::Hash::hash(&self.#field_names, hasher);)*
-            }
-        }
-
-        #[automatically_derived]
-        impl #impl_generics ::fayalite::__std::cmp::Eq for #the_struct_ident #type_generics
-        #where_clause
-        {
-        }
-
-        #[automatically_derived]
-        impl #impl_generics ::fayalite::__std::cmp::PartialEq for #the_struct_ident #type_generics
-        #where_clause
-        {
-            #[allow(unused_variables)]
-            #[allow(clippy::nonminimal_bool)]
-            fn eq(&self, other: &Self) -> ::fayalite::__std::primitive::bool {
-                true #(&& ::fayalite::__std::cmp::PartialEq::eq(
-                    &self.#field_names,
-                    &other.#field_names,
-                ))*
-            }
-        }
-    }
-}
-
-pub(crate) fn append_field(fields: &mut Fields, mut field: Field) -> Member {
-    let ident = field.ident.clone().expect("ident is supplied");
-    match fields {
-        Fields::Named(FieldsNamed { named, .. }) => {
-            named.push(field);
-            Member::Named(ident)
-        }
-        Fields::Unnamed(FieldsUnnamed { unnamed, .. }) => {
-            field.ident = None;
-            field.colon_token = None;
-            let index = unnamed.len();
-            unnamed.push(field);
-            Member::Unnamed(index.into())
-        }
-        Fields::Unit => {
-            *fields = Fields::Named(FieldsNamed {
-                brace_token: Default::default(),
-                named: Punctuated::from_iter([field]),
-            });
-            Member::Named(ident)
-        }
-    }
-}
-
-#[derive(Clone, Debug)]
-pub(crate) struct BuilderField {
-    pub(crate) names: HashSet<Member>,
-    pub(crate) mapped_value: Expr,
-    pub(crate) mapped_type: Type,
-    pub(crate) where_clause: Option<WhereClause>,
-    pub(crate) builder_field_name: Ident,
-    pub(crate) type_param: Ident,
-}
-
-#[derive(Debug)]
-pub(crate) struct Builder {
-    struct_name: Ident,
-    vis: Visibility,
-    fields: BTreeMap<String, BuilderField>,
-}
-
-#[derive(Debug)]
-pub(crate) struct BuilderWithFields {
-    struct_name: Ident,
-    vis: Visibility,
-    phantom_type_param: Ident,
-    phantom_type_field: Ident,
-    fields: Vec<(String, BuilderField)>,
-}
-
-impl Builder {
-    pub(crate) fn new(struct_name: Ident, vis: Visibility) -> Self {
-        Self {
-            struct_name,
-            vis,
-            fields: BTreeMap::new(),
-        }
-    }
-    pub(crate) fn insert_field(
-        &mut self,
-        name: Member,
-        map_value: impl FnOnce(&Ident) -> Expr,
-        map_type: impl FnOnce(&Ident) -> Type,
-        where_clause: impl FnOnce(&Ident) -> Option<WhereClause>,
-    ) {
-        self.fields
-            .entry(name.to_token_stream().to_string())
-            .or_insert_with_key(|name| {
-                let builder_field_name =
-                    format_ident!("field_{}", name, span = self.struct_name.span());
-                let type_param = format_ident!("__T_{}", name, span = self.struct_name.span());
-                BuilderField {
-                    names: HashSet::new(),
-                    mapped_value: map_value(&builder_field_name),
-                    mapped_type: map_type(&type_param),
-                    where_clause: where_clause(&type_param),
-                    builder_field_name,
-                    type_param,
-                }
-            })
-            .names
-            .insert(name);
-    }
-    pub(crate) fn finish_filling_in_fields(self) -> BuilderWithFields {
-        let Self {
-            struct_name,
-            vis,
-            fields,
-        } = self;
-        let fields = Vec::from_iter(fields);
-        BuilderWithFields {
-            phantom_type_param: Ident::new("__Phantom", struct_name.span()),
-            phantom_type_field: Ident::new("__phantom", struct_name.span()),
-            struct_name,
-            vis,
-            fields,
-        }
-    }
-}
-
-impl BuilderWithFields {
-    pub(crate) fn get_field(&self, name: &Member) -> Option<(usize, &BuilderField)> {
-        let index = self
-            .fields
-            .binary_search_by_key(&&*name.to_token_stream().to_string(), |v| &*v.0)
-            .ok()?;
-        Some((index, &self.fields[index].1))
-    }
-    pub(crate) fn ty(
-        &self,
-        specified_fields: impl IntoIterator<Item = (Member, Type)>,
-        phantom_type: Option<&Type>,
-        other_fields_are_any_type: bool,
-    ) -> TypePath {
-        let Self {
-            struct_name,
-            vis: _,
-            phantom_type_param,
-            phantom_type_field: _,
-            fields,
-        } = self;
-        let span = struct_name.span();
-        let mut arguments =
-            Vec::from_iter(fields.iter().map(|(_, BuilderField { type_param, .. })| {
-                if other_fields_are_any_type {
-                    parse_quote_spanned! {span=>
-                        #type_param
-                    }
-                } else {
-                    parse_quote_spanned! {span=>
-                        ()
-                    }
-                }
-            }));
-        for (name, ty) in specified_fields {
-            let Some((index, _)) = self.get_field(&name) else {
-                panic!("field not found: {}", name.to_token_stream());
-            };
-            arguments[index] = ty;
-        }
-        let phantom_type_param = phantom_type.is_none().then_some(phantom_type_param);
-        parse_quote_spanned! {span=>
-            #struct_name::<#phantom_type_param #phantom_type #(, #arguments)*>
-        }
-    }
-    pub(crate) fn append_generics(
-        &self,
-        specified_fields: impl IntoIterator<Item = Member>,
-        has_phantom_type_param: bool,
-        other_fields_are_any_type: bool,
-        generics: &mut Generics,
-    ) {
-        let Self {
-            struct_name: _,
-            vis: _,
-            phantom_type_param,
-            phantom_type_field: _,
-            fields,
-        } = self;
-        if has_phantom_type_param {
-            generics.params.push(GenericParam::from(TypeParam::from(
-                phantom_type_param.clone(),
-            )));
-        }
-        if !other_fields_are_any_type {
-            return;
-        }
-        let mut type_params = Vec::from_iter(
-            fields
-                .iter()
-                .map(|(_, BuilderField { type_param, .. })| Some(type_param)),
-        );
-        for name in specified_fields {
-            let Some((index, _)) = self.get_field(&name) else {
-                panic!("field not found: {}", name.to_token_stream());
-            };
-            type_params[index] = None;
-        }
-        generics.params.extend(
-            type_params
-                .into_iter()
-                .filter_map(|v| Some(GenericParam::from(TypeParam::from(v?.clone())))),
-        );
-    }
-    pub(crate) fn make_build_method(
-        &self,
-        build_fn_name: &Ident,
-        specified_fields: impl IntoIterator<Item = (Member, Type)>,
-        generics: &Generics,
-        phantom_type: &Type,
-        return_ty: &Type,
-        mut body: Block,
-    ) -> ItemImpl {
-        let Self {
-            struct_name,
-            vis,
-            phantom_type_param: _,
-            phantom_type_field,
-            fields,
-        } = self;
-        let span = struct_name.span();
-        let field_names = Vec::from_iter(fields.iter().map(|v| &v.1.builder_field_name));
-        let (impl_generics, _type_generics, where_clause) = generics.split_for_impl();
-        let empty_arg = parse_quote_spanned! {span=>
-            ()
-        };
-        let mut ty_arguments = vec![empty_arg; fields.len()];
-        let empty_field_pat = quote_spanned! {span=>
-            : _
-        };
-        let mut field_pats = vec![Some(empty_field_pat); fields.len()];
-        for (name, ty) in specified_fields {
-            let Some((index, _)) = self.get_field(&name) else {
-                panic!("field not found: {}", name.to_token_stream());
-            };
-            ty_arguments[index] = ty;
-            field_pats[index] = None;
-        }
-        body.stmts.insert(
-            0,
-            parse_quote_spanned! {span=>
-                let Self {
-                    #(#field_names #field_pats,)*
-                    #phantom_type_field: _,
-                } = self;
-            },
-        );
-        parse_quote_spanned! {span=>
-            #[automatically_derived]
-            impl #impl_generics #struct_name<#phantom_type #(, #ty_arguments)*>
-            #where_clause
-            {
-                #[allow(non_snake_case, dead_code)]
-                #vis fn #build_fn_name(self) -> #return_ty
-                #body
-            }
-        }
-    }
-}
-
-impl ToTokens for BuilderWithFields {
-    fn to_tokens(&self, tokens: &mut TokenStream) {
-        let Self {
-            struct_name,
-            vis,
-            phantom_type_param,
-            phantom_type_field,
-            fields,
-        } = self;
-        let span = struct_name.span();
-        let mut any_generics = Generics::default();
-        self.append_generics([], true, true, &mut any_generics);
-        let empty_ty = self.ty([], None, false);
-        let field_names = Vec::from_iter(fields.iter().map(|v| &v.1.builder_field_name));
-        let field_type_params = Vec::from_iter(fields.iter().map(|v| &v.1.type_param));
-        quote_spanned! {span=>
-            #[allow(non_camel_case_types)]
-            #[non_exhaustive]
-            #vis struct #struct_name #any_generics {
-                #(#field_names: #field_type_params,)*
-                #phantom_type_field: ::fayalite::__std::marker::PhantomData<#phantom_type_param>,
-            }
-
-            #[automatically_derived]
-            impl<#phantom_type_param> #empty_ty {
-                fn new() -> Self {
-                    Self {
-                        #(#field_names: (),)*
-                        #phantom_type_field: ::fayalite::__std::marker::PhantomData,
-                    }
-                }
-            }
-        }
-        .to_tokens(tokens);
-        for (field_index, (_, field)) in self.fields.iter().enumerate() {
-            let initial_fields = &fields[..field_index];
-            let final_fields = &fields[field_index..][1..];
-            let initial_type_params =
-                Vec::from_iter(initial_fields.iter().map(|v| &v.1.type_param));
-            let final_type_params = Vec::from_iter(final_fields.iter().map(|v| &v.1.type_param));
-            let initial_field_names =
-                Vec::from_iter(initial_fields.iter().map(|v| &v.1.builder_field_name));
-            let final_field_names =
-                Vec::from_iter(final_fields.iter().map(|v| &v.1.builder_field_name));
-            let BuilderField {
-                names: _,
-                mapped_value,
-                mapped_type,
-                where_clause,
-                builder_field_name,
-                type_param,
-            } = field;
-            quote_spanned! {span=>
-                #[automatically_derived]
-                #[allow(non_camel_case_types, dead_code)]
-                impl<#phantom_type_param #(, #initial_type_params)* #(, #final_type_params)*>
-                    #struct_name<
-                        #phantom_type_param,
-                        #(#initial_type_params,)*
-                        (), #(#final_type_params,)*
-                    >
-                {
-                    #vis fn #builder_field_name<#type_param>(
-                        self,
-                        #builder_field_name: #type_param,
-                    ) -> #struct_name<
-                            #phantom_type_param,
-                            #(#initial_type_params,)*
-                            #mapped_type,
-                            #(#final_type_params,)*
-                        >
-                    #where_clause
-                    {
-                        let Self {
-                            #(#initial_field_names,)*
-                            #builder_field_name: (),
-                            #(#final_field_names,)*
-                            #phantom_type_field: _,
-                        } = self;
-                        let #builder_field_name = #mapped_value;
-                        #struct_name {
-                            #(#field_names,)*
-                            #phantom_type_field: ::fayalite::__std::marker::PhantomData,
-                        }
-                    }
-                }
-            }
-            .to_tokens(tokens);
-        }
-    }
-}
-
-pub(crate) struct MapIdents {
-    pub(crate) map: HashMap<Ident, Ident>,
-}
-
-impl Fold for &MapIdents {
-    fn fold_ident(&mut self, i: Ident) -> Ident {
-        self.map.get(&i).cloned().unwrap_or(i)
-    }
-}
-
-pub(crate) struct DupGenerics<M> {
-    pub(crate) combined: Generics,
-    pub(crate) maps: M,
-}
-
-pub(crate) fn merge_punctuated<T, P: Default>(
-    target: &mut Punctuated<T, P>,
-    source: Punctuated<T, P>,
-    make_punct: impl FnOnce() -> P,
-) {
-    if source.is_empty() {
-        return;
-    }
-    if target.is_empty() {
-        *target = source;
-        return;
-    }
-    if !target.trailing_punct() {
-        target.push_punct(make_punct());
-    }
-    target.extend(source.into_pairs());
-}
-
-pub(crate) fn merge_generics(target: &mut Generics, source: Generics) {
-    let Generics {
-        lt_token,
-        params,
-        gt_token,
-        where_clause,
-    } = source;
-    let span = lt_token.map(|v| v.span).unwrap_or_else(|| params.span());
-    target.lt_token = target.lt_token.or(lt_token);
-    merge_punctuated(&mut target.params, params, || Token![,](span));
-    target.gt_token = target.gt_token.or(gt_token);
-    if let Some(where_clause) = where_clause {
-        if let Some(target_where_clause) = &mut target.where_clause {
-            let WhereClause {
-                where_token,
-                predicates,
-            } = where_clause;
-            let span = where_token.span;
-            target_where_clause.where_token = where_token;
-            merge_punctuated(&mut target_where_clause.predicates, predicates, || {
-                Token![,](span)
-            });
-        } else {
-            target.where_clause = Some(where_clause);
-        }
-    }
-}
-
-impl DupGenerics<Vec<MapIdents>> {
-    pub(crate) fn new_dyn(generics: &Generics, count: usize) -> Self {
-        let mut maps = Vec::from_iter((0..count).map(|_| MapIdents {
-            map: HashMap::new(),
-        }));
-        for param in &generics.params {
-            let (GenericParam::Lifetime(LifetimeParam {
-                lifetime: Lifetime { ident, .. },
-                ..
-            })
-            | GenericParam::Type(TypeParam { ident, .. })
-            | GenericParam::Const(ConstParam { ident, .. })) = param;
-            for (i, map_idents) in maps.iter_mut().enumerate() {
-                map_idents
-                    .map
-                    .insert(ident.clone(), format_ident!("__{}_{}", ident, i));
-            }
-        }
-        let mut combined = Generics::default();
-        for map_idents in maps.iter() {
-            merge_generics(
-                &mut combined,
-                fold_generics(&mut { map_idents }, generics.clone()),
-            );
-        }
-        Self { combined, maps }
-    }
-}
-
-impl<const COUNT: usize> DupGenerics<[MapIdents; COUNT]> {
-    pub(crate) fn new(generics: &Generics) -> Self {
-        let DupGenerics { combined, maps } = DupGenerics::new_dyn(generics, COUNT);
-        Self {
-            combined,
-            maps: maps.try_into().ok().unwrap(),
-        }
-    }
-}
-
-pub(crate) fn add_where_predicate(
-    target: &mut Generics,
-    span: Span,
-    where_predicate: WherePredicate,
-) {
-    let WhereClause {
-        where_token: _,
-        predicates,
-    } = target.where_clause.get_or_insert_with(|| WhereClause {
-        where_token: Token![where](span),
-        predicates: Punctuated::new(),
-    });
-    if !predicates.empty_or_trailing() {
-        predicates.push_punct(Token![,](span));
-    }
-    predicates.push_value(where_predicate);
-}
-
-pub(crate) fn make_connect_impl(
-    connect_inexact: Option<(crate::kw::connect_inexact,)>,
-    generics: &Generics,
-    ty_ident: &Ident,
-    field_types: impl IntoIterator<Item = Type>,
-) -> TokenStream {
-    let span = ty_ident.span();
-    let impl_generics;
-    let combined_generics;
-    let where_clause;
-    let lhs_generics;
-    let lhs_type_generics;
-    let rhs_generics;
-    let rhs_type_generics;
-    if connect_inexact.is_some() {
-        let DupGenerics {
-            mut combined,
-            maps: [lhs_map, rhs_map],
-        } = DupGenerics::new(generics);
-        for field_type in field_types {
-            let lhs_type = (&lhs_map).fold_type(field_type.clone());
-            let rhs_type = (&rhs_map).fold_type(field_type);
-            add_where_predicate(
-                &mut combined,
-                span,
-                parse_quote_spanned! {span=>
-                    #lhs_type: ::fayalite::ty::Connect<#rhs_type>
-                },
-            );
-        }
-        combined_generics = combined;
-        (impl_generics, _, where_clause) = combined_generics.split_for_impl();
-        lhs_generics = (&lhs_map).fold_generics(generics.clone());
-        (_, lhs_type_generics, _) = lhs_generics.split_for_impl();
-        rhs_generics = (&rhs_map).fold_generics(generics.clone());
-        (_, rhs_type_generics, _) = rhs_generics.split_for_impl();
-    } else {
-        let mut generics = generics.clone();
-        for field_type in field_types {
-            add_where_predicate(
-                &mut generics,
-                span,
-                parse_quote_spanned! {span=>
-                    #field_type: ::fayalite::ty::Connect<#field_type>
-                },
-            );
-        }
-        combined_generics = generics;
-        (impl_generics, lhs_type_generics, where_clause) = combined_generics.split_for_impl();
-        rhs_type_generics = lhs_type_generics.clone();
-    }
-    quote_spanned! {span=>
-        #[automatically_derived]
-        #[allow(non_camel_case_types)]
-        impl #impl_generics ::fayalite::ty::Connect<#ty_ident #rhs_type_generics>
-            for #ty_ident #lhs_type_generics
-        #where_clause
-        {
-        }
-    }
-}

crates/fayalite-proc-macros-impl/src/value_derive_enum.rs

@@ -1,969 +0,0 @@
-// SPDX-License-Identifier: LGPL-3.0-or-later
-// See Notices.txt for copyright information
-use crate::{
-    value_derive_common::{
-        append_field, derive_clone_hash_eq_partialeq_for_struct, get_field_names, get_target,
-        make_connect_impl, Bounds, Builder, FieldsKind, ParsedField, ValueDeriveGenerics,
-    },
-    value_derive_struct::{self, ParsedStruct, ParsedStructNames, StructOptions},
-    Errors, HdlAttr,
-};
-use proc_macro2::TokenStream;
-use quote::{format_ident, quote, quote_spanned, ToTokens};
-use syn::{
-    parse_quote, parse_quote_spanned, punctuated::Punctuated, spanned::Spanned, token::Brace,
-    Field, FieldMutability, Fields, FieldsNamed, Generics, Ident, Index, ItemEnum, ItemStruct,
-    Member, Path, Token, Type, Variant, Visibility,
-};
-
-crate::options! {
-    #[options = EnumOptions]
-    enum EnumOption {
-        OutlineGenerated(outline_generated),
-        ConnectInexact(connect_inexact),
-        Bounds(where_, Bounds),
-        Target(target, Path),
-    }
-}
-
-crate::options! {
-    #[options = VariantOptions]
-    enum VariantOption {}
-}
-
-crate::options! {
-    #[options = FieldOptions]
-    enum FieldOption {}
-}
-
-enum VariantValue {
-    None,
-    Direct {
-        value_type: Type,
-    },
-    Struct {
-        value_struct: ItemStruct,
-        parsed_struct: ParsedStruct,
-    },
-}
-
-impl VariantValue {
-    fn is_none(&self) -> bool {
-        matches!(self, Self::None)
-    }
-    fn value_ty(&self) -> Option<Type> {
-        match self {
-            VariantValue::None => None,
-            VariantValue::Direct { value_type } => Some(value_type.clone()),
-            VariantValue::Struct { value_struct, .. } => {
-                let (_, type_generics, _) = value_struct.generics.split_for_impl();
-                let ident = &value_struct.ident;
-                Some(parse_quote! { #ident #type_generics })
-            }
-        }
-    }
-}
-
-struct ParsedVariant {
-    options: HdlAttr<VariantOptions>,
-    ident: Ident,
-    fields_kind: FieldsKind,
-    fields: Vec<ParsedField<FieldOptions>>,
-    value: VariantValue,
-}
-
-impl ParsedVariant {
-    fn parse(
-        errors: &mut Errors,
-        variant: Variant,
-        enum_options: &EnumOptions,
-        enum_vis: &Visibility,
-        enum_ident: &Ident,
-        enum_generics: &Generics,
-    ) -> Self {
-        let target = get_target(&enum_options.target, enum_ident);
-        let Variant {
-            mut attrs,
-            ident,
-            fields,
-            discriminant,
-        } = variant;
-        if let Some((eq, _)) = discriminant {
-            errors.error(eq, "#[derive(Value)]: discriminants not allowed");
-        }
-        let variant_options = errors
-            .unwrap_or_default(HdlAttr::parse_and_take_attr(&mut attrs))
-            .unwrap_or_default();
-        let (fields_kind, parsed_fields) =
-            ParsedField::parse_fields(errors, &mut fields.clone(), true);
-        let value = match (&fields_kind, &*parsed_fields) {
-            (FieldsKind::Unit, _) => VariantValue::None,
-            (
-                FieldsKind::Unnamed(_),
-                [ParsedField {
-                    options,
-                    vis: _,
-                    name: Member::Unnamed(Index { index: 0, span: _ }),
-                    ty,
-                }],
-            ) => {
-                let FieldOptions {} = options.body;
-                VariantValue::Direct {
-                    value_type: ty.clone(),
-                }
-            }
-            _ => {
-                let variant_value_struct_ident =
-                    format_ident!("__{}__{}", enum_ident, ident, span = ident.span());
-                let variant_type_struct_ident =
-                    format_ident!("__{}__{}__Type", enum_ident, ident, span = ident.span());
-                let mut value_struct_fields = fields.clone();
-                let (_, type_generics, _) = enum_generics.split_for_impl();
-                append_field(
-                    &mut value_struct_fields,
-                    Field {
-                        attrs: vec![HdlAttr::from(value_derive_struct::FieldOptions {
-                            flip: None,
-                            skip: Some(Default::default()),
-                        })
-                        .to_attr()],
-                        vis: enum_vis.clone(),
-                        mutability: FieldMutability::None,
-                        ident: Some(Ident::new("__phantom", ident.span())),
-                        colon_token: None,
-                        ty: parse_quote_spanned! {ident.span()=>
-                            ::fayalite::__std::marker::PhantomData<#target #type_generics>
-                        },
-                    },
-                );
-                let (value_struct_fields_kind, value_struct_parsed_fields) =
-                    ParsedField::parse_fields(errors, &mut value_struct_fields, false);
-                let value_struct = ItemStruct {
-                    attrs: vec![parse_quote! { #[allow(non_camel_case_types)] }],
-                    vis: enum_vis.clone(),
-                    struct_token: Token![struct](ident.span()),
-                    ident: variant_value_struct_ident.clone(),
-                    generics: enum_generics.clone(),
-                    fields: value_struct_fields,
-                    semi_token: None,
-                };
-                VariantValue::Struct {
-                    value_struct,
-                    parsed_struct: ParsedStruct {
-                        options: StructOptions {
-                            outline_generated: None,
-                            static_: Some(Default::default()),
-                            where_: Some((
-                                Default::default(),
-                                Default::default(),
-                                ValueDeriveGenerics::get(
-                                    enum_generics.clone(),
-                                    &enum_options.where_,
-                                )
-                                .static_type_generics
-                                .where_clause
-                                .into(),
-                            )),
-                            target: None,
-                            connect_inexact: enum_options.connect_inexact,
-                        }
-                        .into(),
-                        vis: enum_vis.clone(),
-                        struct_token: Default::default(),
-                        generics: enum_generics.clone(),
-                        fields_kind: value_struct_fields_kind,
-                        fields: value_struct_parsed_fields,
-                        semi_token: None, // it will fill in the semicolon if needed
-                        skip_check_fields: true,
-                        names: ParsedStructNames {
-                            ident: variant_value_struct_ident.clone(),
-                            type_struct_debug_ident: Some(format!("{enum_ident}::{ident}::Type")),
-                            type_struct_ident: variant_type_struct_ident,
-                            match_variant_ident: None,
-                            builder_struct_ident: None,
-                            mask_match_variant_ident: None,
-                            mask_type_ident: None,
-                            mask_type_debug_ident: Some(format!(
-                                "AsMask<{enum_ident}::{ident}>::Type"
-                            )),
-                            mask_value_ident: None,
-                            mask_value_debug_ident: Some(format!("AsMask<{enum_ident}::{ident}>")),
-                            mask_builder_struct_ident: None,
-                        },
-                    },
-                }
-            }
-        };
-        ParsedVariant {
-            options: variant_options,
-            ident,
-            fields_kind,
-            fields: parsed_fields,
-            value,
-        }
-    }
-}
-
-struct ParsedEnum {
-    options: HdlAttr<EnumOptions>,
-    vis: Visibility,
-    enum_token: Token![enum],
-    ident: Ident,
-    generics: Generics,
-    brace_token: Brace,
-    variants: Vec<ParsedVariant>,
-}
-
-impl ParsedEnum {
-    fn parse(item: ItemEnum) -> syn::Result<Self> {
-        let ItemEnum {
-            mut attrs,
-            vis,
-            enum_token,
-            ident,
-            generics,
-            brace_token,
-            variants,
-        } = item;
-        let mut errors = Errors::new();
-        let enum_options = errors
-            .unwrap_or_default(HdlAttr::parse_and_take_attr(&mut attrs))
-            .unwrap_or_default();
-        let variants = variants
-            .into_iter()
-            .map(|variant| {
-                ParsedVariant::parse(
-                    &mut errors,
-                    variant,
-                    &enum_options.body,
-                    &vis,
-                    &ident,
-                    &generics,
-                )
-            })
-            .collect();
-        errors.finish()?;
-        Ok(ParsedEnum {
-            options: enum_options,
-            vis,
-            enum_token,
-            ident,
-            generics,
-            brace_token,
-            variants,
-        })
-    }
-}
-
-impl ToTokens for ParsedEnum {
-    fn to_tokens(&self, tokens: &mut TokenStream) {
-        let Self {
-            options,
-            vis,
-            enum_token,
-            ident: enum_ident,
-            generics: enum_generics,
-            brace_token,
-            variants,
-        } = self;
-        let EnumOptions {
-            outline_generated: _,
-            connect_inexact,
-            where_,
-            target,
-        } = &options.body;
-        let target = get_target(target, enum_ident);
-        let ValueDeriveGenerics {
-            generics: _,
-            static_type_generics,
-        } = ValueDeriveGenerics::get(enum_generics.clone(), where_);
-        let (static_type_impl_generics, static_type_type_generics, static_type_where_clause) =
-            static_type_generics.split_for_impl();
-        let type_struct_ident = format_ident!("__{}__Type", enum_ident);
-        let mut field_checks = vec![];
-        let mut make_type_struct_variant_type = |variant: &ParsedVariant| {
-            let VariantOptions {} = variant.options.body;
-            let (value_struct, parsed_struct) = match &variant.value {
-                VariantValue::None => {
-                    return None;
-                }
-                VariantValue::Direct { value_type } => {
-                    field_checks.push(quote_spanned! {value_type.span()=>
-                        __check_field::<#value_type>();
-                    });
-                    return Some(parse_quote! { <#value_type as ::fayalite::expr::ToExpr>::Type });
-                }
-                VariantValue::Struct {
-                    value_struct,
-                    parsed_struct,
-                } => (value_struct, parsed_struct),
-            };
-            value_struct.to_tokens(tokens);
-            parsed_struct.to_tokens(tokens);
-            let mut field_names = Vec::from_iter(get_field_names(&value_struct.fields));
-            derive_clone_hash_eq_partialeq_for_struct(
-                &value_struct.ident,
-                &static_type_generics,
-                &field_names,
-            )
-            .to_tokens(tokens);
-            field_names = Vec::from_iter(
-                field_names
-                    .into_iter()
-                    .zip(parsed_struct.fields.iter())
-                    .filter_map(|(member, field)| {
-                        field.options.body.skip.is_none().then_some(member)
-                    }),
-            );
-            let field_name_strs =
-                Vec::from_iter(field_names.iter().map(|v| v.to_token_stream().to_string()));
-            let debug_ident = format!("{enum_ident}::{}", variant.ident);
-            let debug_body = match variant.fields_kind {
-                FieldsKind::Unit => quote! {
-                    f.debug_struct(#debug_ident).finish()
-                },
-                FieldsKind::Named(_) => quote! {
-                    f.debug_struct(#debug_ident)
-                        #(.field(#field_name_strs, &self.#field_names))*
-                        .finish()
-                },
-                FieldsKind::Unnamed(_) => quote! {
-                    f.debug_tuple(#debug_ident)#(.field(&self.#field_names))*.finish()
-                },
-            };
-            let value_struct_ident = &value_struct.ident;
-            quote! {
-                #[automatically_derived]
-                impl #static_type_impl_generics ::fayalite::__std::fmt::Debug
-                    for #value_struct_ident #static_type_type_generics
-                #static_type_where_clause
-                {
-                    fn fmt(
-                        &self,
-                        f: &mut ::fayalite::__std::fmt::Formatter<'_>,
-                    ) -> ::fayalite::__std::fmt::Result {
-                        #debug_body
-                    }
-                }
-            }
-            .to_tokens(tokens);
-            Some(parse_quote! {
-                <
-                    #value_struct_ident #static_type_type_generics
-                    as ::fayalite::expr::ToExpr
-                >::Type
-            })
-        };
-        let type_struct_variants = Punctuated::from_iter(variants.iter().filter_map(|variant| {
-            let VariantOptions {} = variant.options.body;
-            Some(Field {
-                attrs: vec![],
-                vis: vis.clone(),
-                mutability: FieldMutability::None,
-                ident: Some(variant.ident.clone()),
-                colon_token: None, // it will fill in the colon if needed
-                ty: make_type_struct_variant_type(variant)?,
-            })
-        }));
-        let type_struct = ItemStruct {
-            attrs: vec![
-                parse_quote! {#[allow(non_camel_case_types)]},
-                parse_quote! {#[allow(non_snake_case)]},
-            ],
-            vis: vis.clone(),
-            struct_token: Token![struct](enum_token.span),
-            ident: type_struct_ident,
-            generics: static_type_generics.clone(),
-            fields: Fields::Named(FieldsNamed {
-                brace_token: *brace_token,
-                named: type_struct_variants,
-            }),
-            semi_token: None,
-        };
-        let type_struct_ident = &type_struct.ident;
-        let type_struct_debug_ident = format!("{enum_ident}::Type");
-        type_struct.to_tokens(tokens);
-        let non_empty_variant_names = Vec::from_iter(
-            variants
-                .iter()
-                .filter(|v| !v.value.is_none())
-                .map(|v| v.ident.clone()),
-        );
-        let non_empty_variant_name_strs =
-            Vec::from_iter(non_empty_variant_names.iter().map(|v| v.to_string()));
-        let debug_type_body = quote! {
-            f.debug_struct(#type_struct_debug_ident)
-                #(.field(#non_empty_variant_name_strs, &self.#non_empty_variant_names))*
-                .finish()
-        };
-        derive_clone_hash_eq_partialeq_for_struct(
-            type_struct_ident,
-            &static_type_generics,
-            &non_empty_variant_names,
-        )
-        .to_tokens(tokens);
-        let variant_names = Vec::from_iter(variants.iter().map(|v| &v.ident));
-        let variant_name_strs = Vec::from_iter(variant_names.iter().map(|v| v.to_string()));
-        let (variant_field_pats, variant_to_canonical_values): (Vec<_>, Vec<_>) = variants
-            .iter()
-            .map(|v| {
-                let field_names: Vec<_> = v.fields.iter().map(|field| &field.name).collect();
-                let var_names: Vec<_> = v.fields.iter().map(|field| field.var_name()).collect();
-                let field_pats = quote! {
-                    #(#field_names: #var_names,)*
-                };
-                let to_canonical_value = match &v.value {
-                    VariantValue::None => quote! { ::fayalite::__std::option::Option::None },
-                    VariantValue::Direct { .. } => {
-                        debug_assert_eq!(var_names.len(), 1);
-                        quote! {
-                            ::fayalite::__std::option::Option::Some(
-                                ::fayalite::ty::DynValueTrait::to_canonical_dyn(#(#var_names)*),
-                            )
-                        }
-                    }
-                    VariantValue::Struct {
-                        value_struct,
-                        parsed_struct,
-                    } => {
-                        let value_struct_ident = &value_struct.ident;
-                        let phantom_field_name = &parsed_struct
-                            .fields
-                            .last()
-                            .expect("missing phantom field")
-                            .name;
-                        let type_generics = static_type_type_generics.as_turbofish();
-                        quote! {
-                            ::fayalite::__std::option::Option::Some(
-                                ::fayalite::ty::DynValueTrait::to_canonical_dyn(
-                                    &#value_struct_ident #type_generics {
-                                        #(#field_names:
-                                            ::fayalite::__std::clone::Clone::clone(#var_names),)*
-                                        #phantom_field_name: ::fayalite::__std::marker::PhantomData,
-                                    },
-                                ),
-                            )
-                        }
-                    }
-                };
-                (field_pats, to_canonical_value)
-            })
-            .unzip();
-        let mut match_enum_variants = Punctuated::new();
-        let mut match_enum_debug_arms = vec![];
-        let mut match_enum_arms = vec![];
-        let mut variant_vars = vec![];
-        let mut from_canonical_type_variant_lets = vec![];
-        let mut non_empty_variant_vars = vec![];
-        let mut enum_type_variants = vec![];
-        let mut enum_type_variants_hint = vec![];
-        let match_enum_ident = format_ident!("__{}__MatchEnum", enum_ident);
-        let mut builder = Builder::new(format_ident!("__{}__Builder", enum_ident), vis.clone());
-        for variant in variants.iter() {
-            for field in variant.fields.iter() {
-                builder.insert_field(
-                    field.name.clone(),
-                    |v| {
-                        parse_quote_spanned! {v.span()=>
-                            ::fayalite::expr::ToExpr::to_expr(&#v)
-                        }
-                    },
-                    |t| {
-                        parse_quote_spanned! {t.span()=>
-                            ::fayalite::expr::Expr<<
-                                <#t as ::fayalite::expr::ToExpr>::Type
-                                as ::fayalite::ty::Type
-                            >::Value>
-                        }
-                    },
-                    |t| {
-                        parse_quote_spanned! {t.span()=>
-                            where
-                                #t: ::fayalite::expr::ToExpr,
-                        }
-                    },
-                );
-            }
-        }
-        let builder = builder.finish_filling_in_fields();
-        builder.to_tokens(tokens);
-        for (variant_index, variant) in variants.iter().enumerate() {
-            let variant_var = format_ident!("__v_{}", variant.ident);
-            let variant_name = &variant.ident;
-            let variant_name_str = variant.ident.to_string();
-            match_enum_variants.push(Variant {
-                attrs: vec![],
-                ident: variant.ident.clone(),
-                fields: variant.fields_kind.into_fields(variant.fields.iter().map(
-                    |ParsedField {
-                         options,
-                         vis,
-                         name,
-                         ty,
-                     }| {
-                        let FieldOptions {} = options.body;
-                        Field {
-                            attrs: vec![],
-                            vis: vis.clone(),
-                            mutability: FieldMutability::None,
-                            ident: if let Member::Named(name) = name {
-                                Some(name.clone())
-                            } else {
-                                None
-                            },
-                            colon_token: None,
-                            ty: parse_quote! { ::fayalite::expr::Expr<#ty> },
-                        }
-                    },
-                )),
-                discriminant: None,
-            });
-            let match_enum_field_names = Vec::from_iter(variant.fields.iter().map(
-                |ParsedField {
-                     options,
-                     vis: _,
-                     name,
-                     ty: _,
-                 }| {
-                    let FieldOptions {} = options.body;
-                    name
-                },
-            ));
-            let match_enum_field_name_strs = Vec::from_iter(variant.fields.iter().map(
-                |ParsedField {
-                     options,
-                     vis: _,
-                     name,
-                     ty: _,
-                 }| {
-                    let FieldOptions {} = options.body;
-                    name.to_token_stream().to_string()
-                },
-            ));
-            let match_enum_debug_vars = Vec::from_iter(variant.fields.iter().map(
-                |ParsedField {
-                     options,
-                     vis: _,
-                     name,
-                     ty: _,
-                 }| {
-                    let FieldOptions {} = options.body;
-                    format_ident!("__v_{}", name)
-                },
-            ));
-            match_enum_debug_arms.push(match variant.fields_kind {
-                FieldsKind::Unit | FieldsKind::Named(_) => quote! {
-                    Self::#variant_name {
-                        #(#match_enum_field_names: ref #match_enum_debug_vars,)*
-                    } => f.debug_struct(#variant_name_str)
-                        #(.field(#match_enum_field_name_strs, #match_enum_debug_vars))*
-                        .finish(),
-                },
-                FieldsKind::Unnamed(_) => quote! {
-                    Self::#variant_name(
-                        #(ref #match_enum_debug_vars,)*
-                    ) => f.debug_tuple(#variant_name_str)
-                        #(.field(#match_enum_debug_vars))*
-                        .finish(),
-                },
-            });
-            if let Some(value_ty) = variant.value.value_ty() {
-                from_canonical_type_variant_lets.push(quote! {
-                    let #variant_var =
-                        #variant_var.from_canonical_type_helper_has_value(#variant_name_str);
-                });
-                non_empty_variant_vars.push(variant_var.clone());
-                enum_type_variants.push(quote! {
-                    ::fayalite::enum_::VariantType {
-                        name: ::fayalite::intern::Intern::intern(#variant_name_str),
-                        ty: ::fayalite::__std::option::Option::Some(
-                            ::fayalite::ty::DynType::canonical_dyn(&self.#variant_name),
-                        ),
-                    }
-                });
-                enum_type_variants_hint.push(quote! {
-                    ::fayalite::enum_::VariantType {
-                        name: ::fayalite::intern::Intern::intern(#variant_name_str),
-                        ty: ::fayalite::__std::option::Option::Some(
-                            ::fayalite::bundle::TypeHint::<
-                                <#value_ty as ::fayalite::expr::ToExpr>::Type,
-                            >::intern_dyn(),
-                        ),
-                    }
-                });
-            } else {
-                from_canonical_type_variant_lets.push(quote! {
-                    #variant_var.from_canonical_type_helper_no_value(#variant_name_str);
-                });
-                enum_type_variants.push(quote! {
-                    ::fayalite::enum_::VariantType {
-                        name: ::fayalite::intern::Intern::intern(#variant_name_str),
-                        ty: ::fayalite::__std::option::Option::None,
-                    }
-                });
-                enum_type_variants_hint.push(quote! {
-                    ::fayalite::enum_::VariantType {
-                        name: ::fayalite::intern::Intern::intern(#variant_name_str),
-                        ty: ::fayalite::__std::option::Option::None,
-                    }
-                });
-            }
-            variant_vars.push(variant_var);
-            match_enum_arms.push(match &variant.value {
-                VariantValue::None => quote! {
-                    #variant_index => #match_enum_ident::#variant_name,
-                },
-                VariantValue::Direct { value_type } => quote! {
-                    #variant_index => #match_enum_ident::#variant_name {
-                        #(#match_enum_field_names)*: ::fayalite::expr::ToExpr::to_expr(
-                            &__variant_access.downcast_unchecked::<
-                                <#value_type as ::fayalite::expr::ToExpr>::Type>(),
-                        ),
-                    },
-                },
-                VariantValue::Struct {
-                    value_struct: ItemStruct { ident, .. },
-                    ..
-                } => quote! {
-                    #variant_index => {
-                        let __variant_access = ::fayalite::expr::ToExpr::to_expr(
-                            &__variant_access.downcast_unchecked::<<
-                                #ident #static_type_type_generics
-                                as ::fayalite::expr::ToExpr
-                            >::Type>(),
-                        );
-                        #match_enum_ident::#variant_name {
-                            #(#match_enum_field_names:
-                                (*__variant_access).#match_enum_field_names,)*
-                        }
-                    },
-                },
-            });
-            let builder_field_and_types = Vec::from_iter(variant.fields.iter().map(
-                |ParsedField {
-                     options,
-                     vis: _,
-                     name,
-                     ty,
-                 }| {
-                    let FieldOptions {} = options.body;
-                    (name, ty)
-                },
-            ));
-            let builder_field_vars = Vec::from_iter(
-                builder_field_and_types
-                    .iter()
-                    .map(|(name, _)| &builder.get_field(name).unwrap().1.builder_field_name),
-            );
-            let build_body = match &variant.value {
-                VariantValue::None => parse_quote! {
-                    {
-                        ::fayalite::expr::ToExpr::to_expr(
-                            &::fayalite::expr::ops::EnumLiteral::<
-                                #type_struct_ident #static_type_type_generics
-                            >::new_unchecked(
-                                ::fayalite::__std::option::Option::None,
-                                #variant_index,
-                                ::fayalite::ty::StaticType::static_type(),
-                            ),
-                        )
-                    }
-                },
-                VariantValue::Direct { value_type: _ } => parse_quote! {
-                    {
-                        ::fayalite::expr::ToExpr::to_expr(
-                            &::fayalite::expr::ops::EnumLiteral::<
-                                #type_struct_ident #static_type_type_generics
-                            >::new_unchecked(
-                                ::fayalite::__std::option::Option::Some(
-                                    #(#builder_field_vars)*.to_canonical_dyn(),
-                                ),
-                                #variant_index,
-                                ::fayalite::ty::StaticType::static_type(),
-                            ),
-                        )
-                    }
-                },
-                VariantValue::Struct {
-                    parsed_struct:
-                        ParsedStruct {
-                            names:
-                                ParsedStructNames {
-                                    type_struct_ident: field_type_struct_ident,
-                                    ..
-                                },
-                            ..
-                        },
-                    ..
-                } => parse_quote! {
-                    {
-                        let __builder = <
-                            #field_type_struct_ident #static_type_type_generics
-                            as ::fayalite::bundle::BundleType
-                        >::builder();
-                        #(let __builder = __builder.#builder_field_vars(#builder_field_vars);)*
-                        ::fayalite::expr::ToExpr::to_expr(
-                            &::fayalite::expr::ops::EnumLiteral::<
-                                #type_struct_ident #static_type_type_generics
-                            >::new_unchecked(
-                                ::fayalite::__std::option::Option::Some(
-                                    __builder.build().to_canonical_dyn(),
-                                ),
-                                #variant_index,
-                                ::fayalite::ty::StaticType::static_type(),
-                            ),
-                        )
-                    }
-                },
-            };
-            builder
-                .make_build_method(
-                    &format_ident!("variant_{}", variant_name),
-                    variant.fields.iter().map(
-                        |ParsedField {
-                             options,
-                             vis: _,
-                             name,
-                             ty,
-                         }| {
-                            let FieldOptions {} = options.body;
-                            (name.clone(), parse_quote! { ::fayalite::expr::Expr<#ty> })
-                        },
-                    ),
-                    &static_type_generics,
-                    &parse_quote! {#type_struct_ident #static_type_type_generics},
-                    &parse_quote! { ::fayalite::expr::Expr<#target #static_type_type_generics> },
-                    build_body,
-                )
-                .to_tokens(tokens);
-        }
-        let match_enum = ItemEnum {
-            attrs: vec![parse_quote! {#[allow(non_camel_case_types)]}],
-            vis: vis.clone(),
-            enum_token: *enum_token,
-            ident: match_enum_ident,
-            generics: static_type_generics.clone(),
-            brace_token: *brace_token,
-            variants: match_enum_variants,
-        };
-        let match_enum_ident = &match_enum.ident;
-        match_enum.to_tokens(tokens);
-        make_connect_impl(
-            *connect_inexact,
-            &static_type_generics,
-            type_struct_ident,
-            variants.iter().flat_map(|variant| {
-                variant.fields.iter().map(|field| {
-                    let ty = &field.ty;
-                    parse_quote_spanned! {field.name.span()=>
-                        <#ty as ::fayalite::expr::ToExpr>::Type
-                    }
-                })
-            }),
-        )
-        .to_tokens(tokens);
-        let variant_count = variants.len();
-        let empty_builder_ty = builder.ty([], Some(&parse_quote! { Self }), false);
-        quote! {
-            #[automatically_derived]
-            impl #static_type_impl_generics ::fayalite::__std::fmt::Debug
-                for #match_enum_ident #static_type_type_generics
-            #static_type_where_clause
-            {
-                fn fmt(
-                    &self,
-                    f: &mut ::fayalite::__std::fmt::Formatter<'_>,
-                ) -> ::fayalite::__std::fmt::Result {
-                    match *self {
-                        #(#match_enum_debug_arms)*
-                    }
-                }
-            }
-
-            #[automatically_derived]
-            impl #static_type_impl_generics ::fayalite::ty::StaticType
-                for #type_struct_ident #static_type_type_generics
-            #static_type_where_clause
-            {
-                fn static_type() -> Self {
-                    Self {
-                        #(#non_empty_variant_names: ::fayalite::ty::StaticType::static_type(),)*
-                    }
-                }
-            }
-
-            fn __check_field<T: ::fayalite::ty::Value>()
-            where
-                <T as ::fayalite::expr::ToExpr>::Type: ::fayalite::ty::Type<Value = T>,
-            {}
-            fn __check_fields #static_type_impl_generics(_: #target #static_type_type_generics)
-            #static_type_where_clause
-            {
-                #(#field_checks)*
-            }
-
-            #[automatically_derived]
-            impl #static_type_impl_generics ::fayalite::__std::fmt::Debug
-                for #type_struct_ident #static_type_type_generics
-            #static_type_where_clause
-            {
-                fn fmt(
-                    &self,
-                    f: &mut ::fayalite::__std::fmt::Formatter<'_>,
-                ) -> ::fayalite::__std::fmt::Result {
-                    #debug_type_body
-                }
-            }
-
-            #[automatically_derived]
-            impl #static_type_impl_generics ::fayalite::ty::Type
-                for #type_struct_ident #static_type_type_generics
-            #static_type_where_clause
-            {
-                type CanonicalType = ::fayalite::enum_::DynEnumType;
-                type Value = #target #static_type_type_generics;
-                type CanonicalValue = ::fayalite::enum_::DynEnum;
-                type MaskType = ::fayalite::int::UIntType<1>;
-                type MaskValue = ::fayalite::int::UInt<1>;
-                type MatchVariant = #match_enum_ident #static_type_type_generics;
-                type MatchActiveScope = ::fayalite::module::Scope;
-                type MatchVariantAndInactiveScope =
-                    ::fayalite::enum_::EnumMatchVariantAndInactiveScope<Self>;
-                type MatchVariantsIter = ::fayalite::enum_::EnumMatchVariantsIter<Self>;
-                fn match_variants<IO: ::fayalite::bundle::BundleValue>(
-                    this: ::fayalite::expr::Expr<<Self as ::fayalite::ty::Type>::Value>,
-                    module_builder: &mut ::fayalite::module::ModuleBuilder<
-                        IO,
-                        ::fayalite::module::NormalModule,
-                    >,
-                    source_location: ::fayalite::source_location::SourceLocation,
-                ) -> <Self as ::fayalite::ty::Type>::MatchVariantsIter
-                where
-                    <IO as ::fayalite::expr::ToExpr>::Type:
-                        ::fayalite::bundle::BundleType<Value = IO>,
-                {
-                    module_builder.enum_match_variants_helper(this, source_location)
-                }
-                fn mask_type(&self) -> <Self as ::fayalite::ty::Type>::MaskType {
-                    ::fayalite::int::UIntType::new()
-                }
-                fn canonical(&self) -> <Self as ::fayalite::ty::Type>::CanonicalType {
-                    let variants = ::fayalite::enum_::EnumType::variants(self);
-                    ::fayalite::enum_::DynEnumType::new(variants)
-                }
-                fn source_location(&self) -> ::fayalite::source_location::SourceLocation {
-                    ::fayalite::source_location::SourceLocation::caller()
-                }
-                fn type_enum(&self) -> ::fayalite::ty::TypeEnum {
-                    ::fayalite::ty::TypeEnum::EnumType(::fayalite::ty::Type::canonical(self))
-                }
-                #[allow(non_snake_case)]
-                fn from_canonical_type(t: <Self as ::fayalite::ty::Type>::CanonicalType) -> Self {
-                    let [#(#variant_vars),*] = *::fayalite::enum_::EnumType::variants(&t) else {
-                        ::fayalite::__std::panic!("wrong number of variants");
-                    };
-                    #(#from_canonical_type_variant_lets)*
-                    Self {
-                        #(#non_empty_variant_names: #non_empty_variant_vars,)*
-                    }
-                }
-            }
-
-            #[automatically_derived]
-            #[allow(clippy::init_numbered_fields)]
-            impl #static_type_impl_generics ::fayalite::enum_::EnumType
-                for #type_struct_ident #static_type_type_generics
-            #static_type_where_clause
-            {
-                type Builder = #empty_builder_ty;
-                fn match_activate_scope(
-                    v: <Self as ::fayalite::ty::Type>::MatchVariantAndInactiveScope,
-                ) -> (
-                    <Self as ::fayalite::ty::Type>::MatchVariant,
-                    <Self as ::fayalite::ty::Type>::MatchActiveScope,
-                ) {
-                    let (__variant_access, __scope) = v.activate();
-                    (
-                        match ::fayalite::expr::ops::VariantAccess::variant_index(
-                            &*__variant_access,
-                        ) {
-                            #(#match_enum_arms)*
-                            #variant_count.. => ::fayalite::__std::panic!("invalid variant index"),
-                        },
-                        __scope,
-                    )
-                }
-                fn builder() -> <Self as ::fayalite::enum_::EnumType>::Builder {
-                    #empty_builder_ty::new()
-                }
-                fn variants(&self) -> ::fayalite::intern::Interned<[::fayalite::enum_::VariantType<
-                    ::fayalite::intern::Interned<dyn ::fayalite::ty::DynCanonicalType>,
-                >]> {
-                    ::fayalite::intern::Intern::intern(&[#(#enum_type_variants,)*][..])
-                }
-                fn variants_hint() -> ::fayalite::enum_::VariantsHint {
-                    ::fayalite::enum_::VariantsHint::new([#(#enum_type_variants_hint,)*], false)
-                }
-            }
-
-            #[automatically_derived]
-            impl #static_type_impl_generics ::fayalite::expr::ToExpr
-                for #target #static_type_type_generics
-            #static_type_where_clause
-            {
-                type Type = #type_struct_ident #static_type_type_generics;
-                fn ty(&self) -> <Self as ::fayalite::expr::ToExpr>::Type {
-                    ::fayalite::ty::StaticType::static_type()
-                }
-                fn to_expr(&self) -> ::fayalite::expr::Expr<Self> {
-                    ::fayalite::expr::Expr::from_value(self)
-                }
-            }
-
-            #[automatically_derived]
-            impl #static_type_impl_generics ::fayalite::ty::Value
-                for #target #static_type_type_generics
-            #static_type_where_clause
-            {
-                fn to_canonical(&self) -> <
-                        <Self as ::fayalite::expr::ToExpr>::Type
-                        as ::fayalite::ty::Type
-                    >::CanonicalValue
-                {
-                    let __ty = ::fayalite::ty::Type::canonical(&::fayalite::expr::ToExpr::ty(self));
-                    match self {
-                        #(Self::#variant_names { #variant_field_pats } => {
-                            ::fayalite::enum_::DynEnum::new_by_name(
-                                __ty,
-                                ::fayalite::intern::Intern::intern(#variant_name_strs),
-                                #variant_to_canonical_values,
-                            )
-                        })*
-                    }
-                }
-            }
-
-            #[automatically_derived]
-            impl #static_type_impl_generics ::fayalite::enum_::EnumValue
-                for #target #static_type_type_generics
-            #static_type_where_clause
-            {
-            }
-        }
-        .to_tokens(tokens);
-    }
-}
-
-pub(crate) fn value_derive_enum(item: ItemEnum) -> syn::Result<TokenStream> {
-    let item = ParsedEnum::parse(item)?;
-    let outline_generated = item.options.body.outline_generated;
-    let mut contents = quote! {
-        const _: () = {
-            #item
-        };
-    };
-    if outline_generated.is_some() {
-        contents = crate::outline_generated(contents, "value-enum-");
-    }
-    Ok(contents)
-}

crates/fayalite-proc-macros-impl/src/value_derive_struct.rs

@@ -1,765 +0,0 @@
-// SPDX-License-Identifier: LGPL-3.0-or-later
-// See Notices.txt for copyright information
-use crate::{
-    value_derive_common::{
-        append_field, derive_clone_hash_eq_partialeq_for_struct, get_target, make_connect_impl,
-        Bounds, Builder, FieldsKind, ParsedField, ValueDeriveGenerics,
-    },
-    Errors, HdlAttr,
-};
-use proc_macro2::TokenStream;
-use quote::{format_ident, quote, quote_spanned, ToTokens};
-use syn::{
-    parse_quote, parse_quote_spanned, spanned::Spanned, FieldMutability, Generics, Ident,
-    ItemStruct, Member, Path, Token, Visibility,
-};
-
-crate::options! {
-    #[options = StructOptions]
-    pub(crate) enum StructOption {
-        OutlineGenerated(outline_generated),
-        Static(static_),
-        ConnectInexact(connect_inexact),
-        Bounds(where_, Bounds),
-        Target(target, Path),
-    }
-}
-
-crate::options! {
-    #[options = FieldOptions]
-    pub(crate) enum FieldOption {
-        Flip(flip),
-        Skip(skip),
-    }
-}
-
-pub(crate) struct ParsedStructNames<I, S> {
-    pub(crate) ident: Ident,
-    pub(crate) type_struct_debug_ident: S,
-    pub(crate) type_struct_ident: Ident,
-    pub(crate) match_variant_ident: I,
-    pub(crate) builder_struct_ident: I,
-    pub(crate) mask_match_variant_ident: I,
-    pub(crate) mask_type_ident: I,
-    pub(crate) mask_type_debug_ident: S,
-    pub(crate) mask_value_ident: I,
-    pub(crate) mask_value_debug_ident: S,
-    pub(crate) mask_builder_struct_ident: I,
-}
-
-pub(crate) struct ParsedStruct {
-    pub(crate) options: HdlAttr<StructOptions>,
-    pub(crate) vis: Visibility,
-    pub(crate) struct_token: Token![struct],
-    pub(crate) generics: Generics,
-    pub(crate) fields_kind: FieldsKind,
-    pub(crate) fields: Vec<ParsedField<FieldOptions>>,
-    pub(crate) semi_token: Option<Token![;]>,
-    pub(crate) skip_check_fields: bool,
-    pub(crate) names: ParsedStructNames<Option<Ident>, Option<String>>,
-}
-
-impl ParsedStruct {
-    pub(crate) fn parse(item: &mut ItemStruct) -> syn::Result<Self> {
-        let ItemStruct {
-            attrs,
-            vis,
-            struct_token,
-            ident,
-            generics,
-            fields,
-            semi_token,
-        } = item;
-        let mut errors = Errors::new();
-        let struct_options = errors
-            .unwrap_or_default(HdlAttr::parse_and_take_attr(attrs))
-            .unwrap_or_default();
-        let (fields_kind, fields) = ParsedField::parse_fields(&mut errors, fields, false);
-        errors.finish()?;
-        Ok(ParsedStruct {
-            options: struct_options,
-            vis: vis.clone(),
-            struct_token: *struct_token,
-            generics: generics.clone(),
-            fields_kind,
-            fields,
-            semi_token: *semi_token,
-            skip_check_fields: false,
-            names: ParsedStructNames {
-                ident: ident.clone(),
-                type_struct_debug_ident: None,
-                type_struct_ident: format_ident!("__{}__Type", ident),
-                match_variant_ident: None,
-                builder_struct_ident: None,
-                mask_match_variant_ident: None,
-                mask_type_ident: None,
-                mask_type_debug_ident: None,
-                mask_value_ident: None,
-                mask_value_debug_ident: None,
-                mask_builder_struct_ident: None,
-            },
-        })
-    }
-    pub(crate) fn write_body(
-        &self,
-        target: Path,
-        names: ParsedStructNames<&Ident, &String>,
-        is_for_mask: bool,
-        tokens: &mut TokenStream,
-    ) {
-        let Self {
-            options,
-            vis,
-            struct_token,
-            generics,
-            fields_kind,
-            fields,
-            semi_token,
-            skip_check_fields,
-            names: _,
-        } = self;
-        let skip_check_fields = *skip_check_fields || is_for_mask;
-        let ParsedStructNames {
-            ident: struct_ident,
-            type_struct_debug_ident,
-            type_struct_ident,
-            match_variant_ident,
-            builder_struct_ident,
-            mask_match_variant_ident: _,
-            mask_type_ident,
-            mask_type_debug_ident: _,
-            mask_value_ident,
-            mask_value_debug_ident,
-            mask_builder_struct_ident: _,
-        } = names;
-        let StructOptions {
-            outline_generated: _,
-            where_,
-            target: _,
-            static_,
-            connect_inexact,
-        } = &options.body;
-        let ValueDeriveGenerics {
-            generics,
-            static_type_generics,
-        } = ValueDeriveGenerics::get(generics.clone(), where_);
-        let (impl_generics, type_generics, where_clause) = generics.split_for_impl();
-        let unskipped_fields = fields
-            .iter()
-            .filter(|field| field.options.body.skip.is_none());
-        let _field_names = Vec::from_iter(fields.iter().map(|field| field.name.clone()));
-        let unskipped_field_names =
-            Vec::from_iter(unskipped_fields.clone().map(|field| field.name.clone()));
-        let unskipped_field_name_strs = Vec::from_iter(
-            unskipped_field_names
-                .iter()
-                .map(|field_name| field_name.to_token_stream().to_string()),
-        );
-        let unskipped_field_vars = Vec::from_iter(
-            unskipped_field_names
-                .iter()
-                .map(|field_name| format_ident!("__v_{}", field_name)),
-        );
-        let unskipped_field_flips = Vec::from_iter(
-            unskipped_fields
-                .clone()
-                .map(|field| field.options.body.flip.is_some()),
-        );
-        let mut any_fields_skipped = false;
-        let type_fields = Vec::from_iter(fields.iter().filter_map(|field| {
-            let ParsedField {
-                options,
-                vis,
-                name,
-                ty,
-            } = field;
-            let FieldOptions { flip: _, skip } = &options.body;
-            if skip.is_some() {
-                any_fields_skipped = true;
-                return None;
-            }
-            let ty = if is_for_mask {
-                parse_quote! { ::fayalite::ty::AsMask<#ty> }
-            } else {
-                ty.to_token_stream()
-            };
-            Some(syn::Field {
-                attrs: vec![],
-                vis: vis.clone(),
-                mutability: FieldMutability::None,
-                ident: match name.clone() {
-                    Member::Named(name) => Some(name),
-                    Member::Unnamed(_) => None,
-                },
-                colon_token: None,
-                ty: parse_quote! { <#ty as ::fayalite::expr::ToExpr>::Type },
-            })
-        }));
-        let field_types = Vec::from_iter(type_fields.iter().map(|field| field.ty.clone()));
-        let match_variant_fields = Vec::from_iter(fields.iter().zip(&type_fields).map(
-            |(parsed_field, type_field)| {
-                let field_ty = &parsed_field.ty;
-                syn::Field {
-                    ty: parse_quote! { ::fayalite::expr::Expr<#field_ty> },
-                    ..type_field.clone()
-                }
-            },
-        ));
-
-        let mask_value_fields = Vec::from_iter(fields.iter().zip(&type_fields).map(
-            |(parsed_field, type_field)| {
-                let field_ty = &parsed_field.ty;
-                syn::Field {
-                    ty: parse_quote! { ::fayalite::ty::AsMask<#field_ty> },
-                    ..type_field.clone()
-                }
-            },
-        ));
-
-        let mut type_struct_fields = fields_kind.into_fields(type_fields);
-        let mut match_variant_fields = fields_kind.into_fields(match_variant_fields);
-        let mut mask_value_fields = fields_kind.into_fields(mask_value_fields);
-        let phantom_data_field_name = any_fields_skipped.then(|| {
-            let phantom_data_field_name = Ident::new("__phantom_data", type_struct_ident.span());
-            let member = append_field(
-                &mut type_struct_fields,
-                syn::Field {
-                    attrs: vec![],
-                    vis: vis.clone(),
-                    mutability: FieldMutability::None,
-                    ident: Some(phantom_data_field_name.clone()),
-                    colon_token: None,
-                    ty: parse_quote_spanned! {type_struct_ident.span()=>
-                        ::fayalite::__std::marker::PhantomData<#struct_ident #type_generics>
-                    },
-                },
-            );
-            append_field(
-                &mut match_variant_fields,
-                syn::Field {
-                    attrs: vec![],
-                    vis: Visibility::Inherited,
-                    mutability: FieldMutability::None,
-                    ident: Some(phantom_data_field_name.clone()),
-                    colon_token: None,
-                    ty: parse_quote_spanned! {type_struct_ident.span()=>
-                        ::fayalite::__std::marker::PhantomData<#struct_ident #type_generics>
-                    },
-                },
-            );
-            append_field(
-                &mut mask_value_fields,
-                syn::Field {
-                    attrs: vec![],
-                    vis: Visibility::Inherited,
-                    mutability: FieldMutability::None,
-                    ident: Some(phantom_data_field_name),
-                    colon_token: None,
-                    ty: parse_quote_spanned! {type_struct_ident.span()=>
-                        ::fayalite::__std::marker::PhantomData<#struct_ident #type_generics>
-                    },
-                },
-            );
-            member
-        });
-        let phantom_data_field_name_slice = phantom_data_field_name.as_slice();
-        let type_struct = ItemStruct {
-            attrs: vec![parse_quote! {#[allow(non_camel_case_types)]}],
-            vis: vis.clone(),
-            struct_token: *struct_token,
-            ident: type_struct_ident.clone(),
-            generics: generics.clone(),
-            fields: type_struct_fields,
-            semi_token: *semi_token,
-        };
-        type_struct.to_tokens(tokens);
-        let match_variant_struct = ItemStruct {
-            attrs: vec![parse_quote! {#[allow(non_camel_case_types)]}],
-            vis: vis.clone(),
-            struct_token: *struct_token,
-            ident: match_variant_ident.clone(),
-            generics: generics.clone(),
-            fields: match_variant_fields,
-            semi_token: *semi_token,
-        };
-        match_variant_struct.to_tokens(tokens);
-        let mask_type_body = if is_for_mask {
-            quote! {
-                ::fayalite::__std::clone::Clone::clone(self)
-            }
-        } else {
-            let mask_value_struct = ItemStruct {
-                attrs: vec![parse_quote! {#[allow(non_camel_case_types)]}],
-                vis: vis.clone(),
-                struct_token: *struct_token,
-                ident: mask_value_ident.clone(),
-                generics: generics.clone(),
-                fields: mask_value_fields,
-                semi_token: *semi_token,
-            };
-            mask_value_struct.to_tokens(tokens);
-            let debug_mask_value_body = match fields_kind {
-                FieldsKind::Unit => quote! {
-                    f.debug_struct(#mask_value_debug_ident).finish()
-                },
-                FieldsKind::Named(_) => quote! {
-                    f.debug_struct(#mask_value_debug_ident)
-                        #(.field(#unskipped_field_name_strs, &self.#unskipped_field_names))*
-                        .finish()
-                },
-                FieldsKind::Unnamed(_) => quote! {
-                    f.debug_tuple(#mask_value_debug_ident)
-                        #(.field(&self.#unskipped_field_names))*
-                        .finish()
-                },
-            };
-            quote! {
-                #[automatically_derived]
-                impl #impl_generics ::fayalite::__std::fmt::Debug
-                    for #mask_value_ident #type_generics
-                #where_clause
-                {
-                    fn fmt(
-                        &self,
-                        f: &mut ::fayalite::__std::fmt::Formatter<'_>,
-                    ) -> ::fayalite::__std::fmt::Result {
-                        #debug_mask_value_body
-                    }
-                }
-            }
-            .to_tokens(tokens);
-            quote! {
-                #mask_type_ident {
-                    #(#unskipped_field_names:
-                        ::fayalite::ty::Type::mask_type(&self.#unskipped_field_names),)*
-                    #(#phantom_data_field_name_slice: ::fayalite::__std::marker::PhantomData,)*
-                }
-            }
-        };
-        let debug_type_body = match fields_kind {
-            FieldsKind::Unit => quote! {
-                f.debug_struct(#type_struct_debug_ident).finish()
-            },
-            FieldsKind::Named(_) => quote! {
-                f.debug_struct(#type_struct_debug_ident)
-                    #(.field(#unskipped_field_name_strs, &self.#unskipped_field_names))*
-                    .finish()
-            },
-            FieldsKind::Unnamed(_) => quote! {
-                f.debug_tuple(#type_struct_debug_ident)
-                    #(.field(&self.#unskipped_field_names))*
-                    .finish()
-            },
-        };
-        for the_struct_ident in [&type_struct_ident, match_variant_ident]
-            .into_iter()
-            .chain(is_for_mask.then_some(mask_value_ident))
-        {
-            derive_clone_hash_eq_partialeq_for_struct(
-                the_struct_ident,
-                &generics,
-                &Vec::from_iter(
-                    unskipped_field_names
-                        .iter()
-                        .cloned()
-                        .chain(phantom_data_field_name.clone()),
-                ),
-            )
-            .to_tokens(tokens);
-        }
-        let check_v = format_ident!("__v");
-        let field_checks = Vec::from_iter(fields.iter().map(|ParsedField { ty, name, .. }| {
-            quote_spanned! {ty.span()=>
-                __check_field(#check_v.#name);
-            }
-        }));
-        if static_.is_some() {
-            let (impl_generics, type_generics, where_clause) =
-                static_type_generics.split_for_impl();
-            quote! {
-                #[automatically_derived]
-                impl #impl_generics ::fayalite::ty::StaticType for #type_struct_ident #type_generics
-                #where_clause
-                {
-                    fn static_type() -> Self {
-                        Self {
-                            #(#unskipped_field_names: ::fayalite::ty::StaticType::static_type(),)*
-                            #(#phantom_data_field_name_slice:
-                                ::fayalite::__std::marker::PhantomData,)*
-                        }
-                    }
-                }
-            }
-            .to_tokens(tokens);
-        }
-        if !skip_check_fields {
-            quote! {
-                fn __check_field<T: ::fayalite::ty::Value>(_v: T)
-                where
-                    <T as ::fayalite::expr::ToExpr>::Type: ::fayalite::ty::Type<Value = T>,
-                {}
-                fn __check_fields #impl_generics(#check_v: #target #type_generics)
-                #where_clause
-                {
-                    #(#field_checks)*
-                }
-            }
-            .to_tokens(tokens);
-        }
-        let mut builder = Builder::new(builder_struct_ident.clone(), vis.clone());
-        for field in unskipped_fields.clone() {
-            builder.insert_field(
-                field.name.clone(),
-                |v| {
-                    parse_quote_spanned! {v.span()=>
-                        ::fayalite::expr::ToExpr::to_expr(&#v)
-                    }
-                },
-                |t| {
-                    parse_quote_spanned! {t.span()=>
-                        ::fayalite::expr::Expr<<
-                            <#t as ::fayalite::expr::ToExpr>::Type
-                            as ::fayalite::ty::Type
-                        >::Value>
-                    }
-                },
-                |t| {
-                    parse_quote_spanned! {t.span()=>
-                        where
-                            #t: ::fayalite::expr::ToExpr,
-                    }
-                },
-            );
-        }
-        let builder = builder.finish_filling_in_fields();
-        builder.to_tokens(tokens);
-        let build_type_fields =
-            Vec::from_iter(unskipped_fields.clone().map(|ParsedField { name, .. }| {
-                let builder_field_name = &builder.get_field(name).unwrap().1.builder_field_name;
-                quote_spanned! {struct_ident.span()=>
-                    #name: ::fayalite::expr::ToExpr::ty(&#builder_field_name)
-                }
-            }));
-        let build_expr_fields =
-            Vec::from_iter(unskipped_fields.clone().map(|ParsedField { name, .. }| {
-                let builder_field_name = &builder.get_field(name).unwrap().1.builder_field_name;
-                quote_spanned! {struct_ident.span()=>
-                    #builder_field_name.to_canonical_dyn()
-                }
-            }));
-        let build_specified_fields = unskipped_fields.clone().map(
-            |ParsedField {
-                 options: _,
-                 vis: _,
-                 name,
-                 ty,
-             }| {
-                let ty = if is_for_mask {
-                    parse_quote_spanned! {name.span()=>
-                        ::fayalite::expr::Expr<::fayalite::ty::AsMask<#ty>>
-                    }
-                } else {
-                    parse_quote_spanned! {name.span()=>
-                        ::fayalite::expr::Expr<#ty>
-                    }
-                };
-                (name.clone(), ty)
-            },
-        );
-        let build_body = parse_quote_spanned! {struct_ident.span()=>
-            {
-                ::fayalite::expr::ToExpr::to_expr(
-                    &::fayalite::expr::ops::BundleLiteral::new_unchecked(
-                        ::fayalite::intern::Intern::intern(&[#(
-                            #build_expr_fields,
-                        )*][..]),
-                        #type_struct_ident {
-                            #(#build_type_fields,)*
-                            #(#phantom_data_field_name_slice:
-                                ::fayalite::__std::marker::PhantomData,)*
-                        },
-                    ),
-                )
-            }
-        };
-        builder
-            .make_build_method(
-                &Ident::new("build", struct_ident.span()),
-                build_specified_fields,
-                &generics,
-                &parse_quote_spanned! {struct_ident.span()=>
-                    #type_struct_ident #type_generics
-                },
-                &parse_quote_spanned! {struct_ident.span()=>
-                    ::fayalite::expr::Expr<#target #type_generics>
-                },
-                build_body,
-            )
-            .to_tokens(tokens);
-        make_connect_impl(
-            *connect_inexact,
-            &generics,
-            &type_struct_ident,
-            unskipped_fields.clone().map(|field| {
-                let ty = &field.ty;
-                parse_quote_spanned! {field.name.span()=>
-                    <#ty as ::fayalite::expr::ToExpr>::Type
-                }
-            }),
-        )
-        .to_tokens(tokens);
-        let empty_builder_ty = builder.ty([], Some(&parse_quote! { Self }), false);
-        quote! {
-            #[automatically_derived]
-            impl #impl_generics ::fayalite::__std::fmt::Debug for #type_struct_ident #type_generics
-            #where_clause
-            {
-                fn fmt(
-                    &self,
-                    f: &mut ::fayalite::__std::fmt::Formatter<'_>,
-                ) -> ::fayalite::__std::fmt::Result {
-                    #debug_type_body
-                }
-            }
-
-            #[automatically_derived]
-            impl #impl_generics ::fayalite::ty::Type for #type_struct_ident #type_generics
-            #where_clause
-            {
-                type CanonicalType = ::fayalite::bundle::DynBundleType;
-                type Value = #target #type_generics;
-                type CanonicalValue = ::fayalite::bundle::DynBundle;
-                type MaskType = #mask_type_ident #type_generics;
-                type MaskValue = #mask_value_ident #type_generics;
-                type MatchVariant = #match_variant_ident #type_generics;
-                type MatchActiveScope = ();
-                type MatchVariantAndInactiveScope = ::fayalite::ty::MatchVariantWithoutScope<
-                    #match_variant_ident #type_generics,
-                >;
-                type MatchVariantsIter = ::fayalite::__std::iter::Once<
-                    <Self as ::fayalite::ty::Type>::MatchVariantAndInactiveScope,
-                >;
-                #[allow(unused_variables)]
-                fn match_variants<IO: ::fayalite::bundle::BundleValue>(
-                    this: ::fayalite::expr::Expr<<Self as ::fayalite::ty::Type>::Value>,
-                    module_builder: &mut ::fayalite::module::ModuleBuilder<
-                        IO,
-                        ::fayalite::module::NormalModule,
-                    >,
-                    source_location: ::fayalite::source_location::SourceLocation,
-                ) -> <Self as ::fayalite::ty::Type>::MatchVariantsIter
-                where
-                    <IO as ::fayalite::expr::ToExpr>::Type:
-                        ::fayalite::bundle::BundleType<Value = IO>,
-                {
-                    ::fayalite::__std::iter::once(::fayalite::ty::MatchVariantWithoutScope(
-                        #match_variant_ident {
-                            #(#unskipped_field_names: this.field(#unskipped_field_name_strs),)*
-                            #(#phantom_data_field_name_slice:
-                                ::fayalite::__std::marker::PhantomData,)*
-                        },
-                    ))
-                }
-                fn mask_type(&self) -> <Self as ::fayalite::ty::Type>::MaskType {
-                    #mask_type_body
-                }
-                fn canonical(&self) -> <Self as ::fayalite::ty::Type>::CanonicalType {
-                    let fields = ::fayalite::bundle::BundleType::fields(self);
-                    ::fayalite::bundle::DynBundleType::new(fields)
-                }
-                fn source_location(&self) -> ::fayalite::source_location::SourceLocation {
-                    ::fayalite::source_location::SourceLocation::caller()
-                }
-                fn type_enum(&self) -> ::fayalite::ty::TypeEnum {
-                    ::fayalite::ty::TypeEnum::BundleType(::fayalite::ty::Type::canonical(self))
-                }
-                fn from_canonical_type(t: <Self as ::fayalite::ty::Type>::CanonicalType) -> Self {
-                    let [#(#unskipped_field_vars),*] = *::fayalite::bundle::BundleType::fields(&t)
-                    else {
-                        ::fayalite::__std::panic!("wrong number of fields");
-                    };
-                    Self {
-                        #(#unskipped_field_names: #unskipped_field_vars.from_canonical_type_helper(
-                            #unskipped_field_name_strs,
-                            #unskipped_field_flips,
-                        ),)*
-                        #(#phantom_data_field_name_slice: ::fayalite::__std::marker::PhantomData,)*
-                    }
-                }
-            }
-
-            #[automatically_derived]
-            impl #impl_generics ::fayalite::ty::TypeWithDeref for #type_struct_ident #type_generics
-            #where_clause
-            {
-                #[allow(unused_variables)]
-                fn expr_deref(this: &::fayalite::expr::Expr<<Self as ::fayalite::ty::Type>::Value>)
-                    -> &<Self as ::fayalite::ty::Type>::MatchVariant
-                {
-                    ::fayalite::intern::Interned::<_>::into_inner(
-                        ::fayalite::intern::Intern::intern_sized(#match_variant_ident {
-                            #(#unskipped_field_names: this.field(#unskipped_field_name_strs),)*
-                            #(#phantom_data_field_name_slice:
-                                ::fayalite::__std::marker::PhantomData,)*
-                        }),
-                    )
-                }
-            }
-
-            #[automatically_derived]
-            impl #impl_generics ::fayalite::bundle::BundleType for #type_struct_ident #type_generics
-            #where_clause
-            {
-                type Builder = #empty_builder_ty;
-                fn builder() -> <Self as ::fayalite::bundle::BundleType>::Builder {
-                    #empty_builder_ty::new()
-                }
-                fn fields(&self) -> ::fayalite::intern::Interned<
-                        [::fayalite::bundle::FieldType<::fayalite::intern::Interned<
-                            dyn ::fayalite::ty::DynCanonicalType,
-                        >>],
-                    >
-                {
-                    ::fayalite::intern::Intern::intern(&[#(
-                        ::fayalite::bundle::FieldType {
-                            name: ::fayalite::intern::Intern::intern(#unskipped_field_name_strs),
-                            flipped: #unskipped_field_flips,
-                            ty: ::fayalite::ty::DynType::canonical_dyn(
-                                &self.#unskipped_field_names,
-                            ),
-                        },
-                    )*][..])
-                }
-                fn fields_hint() -> ::fayalite::bundle::FieldsHint {
-                    ::fayalite::bundle::FieldsHint::new([#(
-                        ::fayalite::bundle::FieldType {
-                            name: ::fayalite::intern::Intern::intern(#unskipped_field_name_strs),
-                            flipped: #unskipped_field_flips,
-                            ty: ::fayalite::bundle::TypeHint::<#field_types>::intern_dyn(),
-                        },
-                    )*], false)
-                }
-            }
-
-            #[automatically_derived]
-            impl #impl_generics ::fayalite::expr::ToExpr for #target #type_generics
-            #where_clause
-            {
-                type Type = #type_struct_ident #type_generics;
-                fn ty(&self) -> <Self as ::fayalite::expr::ToExpr>::Type {
-                    #type_struct_ident {
-                        #(#unskipped_field_names: ::fayalite::expr::ToExpr::ty(
-                            &self.#unskipped_field_names,
-                        ),)*
-                        #(#phantom_data_field_name_slice: ::fayalite::__std::marker::PhantomData,)*
-                    }
-                }
-                fn to_expr(&self) -> ::fayalite::expr::Expr<Self> {
-                    ::fayalite::expr::Expr::from_value(self)
-                }
-            }
-
-            #[automatically_derived]
-            impl #impl_generics ::fayalite::ty::Value for #target #type_generics
-            #where_clause
-            {
-                fn to_canonical(&self) -> <
-                        <Self as ::fayalite::expr::ToExpr>::Type
-                        as ::fayalite::ty::Type
-                    >::CanonicalValue
-                {
-                    let ty = ::fayalite::ty::Type::canonical(&::fayalite::expr::ToExpr::ty(self));
-                    ::fayalite::bundle::DynBundle::new(ty, ::fayalite::__std::sync::Arc::new([
-                        #(::fayalite::ty::DynValueTrait::to_canonical_dyn(
-                            &self.#unskipped_field_names,
-                        ),)*
-                    ]))
-                }
-            }
-
-            #[automatically_derived]
-            impl #impl_generics ::fayalite::bundle::BundleValue for #target #type_generics
-            #where_clause
-            {
-            }
-        }
-        .to_tokens(tokens);
-    }
-}
-
-impl ToTokens for ParsedStruct {
-    fn to_tokens(&self, tokens: &mut TokenStream) {
-        let ParsedStructNames {
-            ident: struct_ident,
-            type_struct_debug_ident,
-            type_struct_ident,
-            match_variant_ident,
-            builder_struct_ident,
-            mask_match_variant_ident,
-            mask_type_ident,
-            mask_type_debug_ident,
-            mask_value_ident,
-            mask_value_debug_ident,
-            mask_builder_struct_ident,
-        } = &self.names;
-        macro_rules! unwrap_or_set {
-            ($(let $var:ident =? $fallback_value:expr;)*) => {
-                $(let $var = $var.clone().unwrap_or_else(|| $fallback_value);)*
-            };
-        }
-        unwrap_or_set! {
-            let type_struct_debug_ident =? format!("{struct_ident}::Type");
-            let match_variant_ident =? format_ident!("__{}__MatchVariant", struct_ident);
-            let builder_struct_ident =? format_ident!("__{}__Builder", struct_ident);
-            let mask_match_variant_ident =? format_ident!("__AsMask__{}__MatchVariant", struct_ident);
-            let mask_type_ident =? format_ident!("__AsMask__{}__Type", struct_ident);
-            let mask_type_debug_ident =? format!("AsMask<{struct_ident}>::Type");
-            let mask_value_ident =? format_ident!("__AsMask__{}", struct_ident);
-            let mask_value_debug_ident =? format!("AsMask<{struct_ident}>");
-            let mask_builder_struct_ident =? format_ident!("__AsMask__{}__Builder", struct_ident);
-        }
-        let target = get_target(&self.options.body.target, struct_ident);
-        let names = ParsedStructNames {
-            ident: struct_ident.clone(),
-            type_struct_debug_ident: &type_struct_debug_ident,
-            type_struct_ident: type_struct_ident.clone(),
-            match_variant_ident: &match_variant_ident,
-            builder_struct_ident: &builder_struct_ident,
-            mask_match_variant_ident: &mask_match_variant_ident,
-            mask_type_ident: &mask_type_ident,
-            mask_type_debug_ident: &mask_type_debug_ident,
-            mask_value_ident: &mask_value_ident,
-            mask_value_debug_ident: &mask_value_debug_ident,
-            mask_builder_struct_ident: &mask_builder_struct_ident,
-        };
-        self.write_body(target, names, false, tokens);
-        let mask_names = ParsedStructNames {
-            ident: mask_value_ident.clone(),
-            type_struct_debug_ident: &mask_type_debug_ident,
-            type_struct_ident: mask_type_ident.clone(),
-            match_variant_ident: &mask_match_variant_ident,
-            builder_struct_ident: &mask_builder_struct_ident,
-            mask_match_variant_ident: &mask_match_variant_ident,
-            mask_type_ident: &mask_type_ident,
-            mask_type_debug_ident: &mask_type_debug_ident,
-            mask_value_ident: &mask_value_ident,
-            mask_value_debug_ident: &mask_value_debug_ident,
-            mask_builder_struct_ident: &mask_builder_struct_ident,
-        };
-        self.write_body(mask_value_ident.clone().into(), mask_names, true, tokens);
-    }
-}
-
-pub(crate) fn value_derive_struct(mut item: ItemStruct) -> syn::Result<TokenStream> {
-    let item = ParsedStruct::parse(&mut item)?;
-    let outline_generated = item.options.body.outline_generated;
-    let mut contents = quote! {
-        const _: () = {
-            #item
-        };
-    };
-    if outline_generated.is_some() {
-        contents = crate::outline_generated(contents, "value-struct-");
-    }
-    Ok(contents)
-}

crates/fayalite-proc-macros/src/lib.rs

@@ -2,7 +2,7 @@
 // See Notices.txt for copyright information
 //! proc macros for `fayalite`
 //!
-//! see `fayalite::hdl_module` and `fayalite::ty::Value` for docs
+//! see `fayalite::hdl_module` and `fayalite::hdl` for docs
 
 // intentionally not documented here, see `fayalite::hdl_module` for docs
 #[proc_macro_attribute]
@@ -10,16 +10,19 @@ pub fn hdl_module(
     attr: proc_macro::TokenStream,
     item: proc_macro::TokenStream,
 ) -> proc_macro::TokenStream {
-    match fayalite_proc_macros_impl::module(attr.into(), item.into()) {
+    match fayalite_proc_macros_impl::hdl_module(attr.into(), item.into()) {
         Ok(retval) => retval.into(),
         Err(err) => err.into_compile_error().into(),
     }
 }
 
-// intentionally not documented here, see `fayalite::ty::Value` for docs
-#[proc_macro_derive(Value, attributes(hdl))]
-pub fn value_derive(item: proc_macro::TokenStream) -> proc_macro::TokenStream {
-    match fayalite_proc_macros_impl::value_derive(item.into()) {
+// intentionally not documented here, see `fayalite::hdl` for docs
+#[proc_macro_attribute]
+pub fn hdl(
+    attr: proc_macro::TokenStream,
+    item: proc_macro::TokenStream,
+) -> proc_macro::TokenStream {
+    match fayalite_proc_macros_impl::hdl_attr(attr.into(), item.into()) {
         Ok(retval) => retval.into(),
         Err(err) => err.into_compile_error().into(),
     }

crates/fayalite/build.rs

@@ -4,6 +4,7 @@ use fayalite_visit_gen::parse_and_generate;
 use std::{env, fs, path::Path};
 
 fn main() {
+    println!("cargo::rustc-check-cfg=cfg(todo)");
     let path = "visit_types.json";
     println!("cargo::rerun-if-changed={path}");
     println!("cargo::rerun-if-changed=build.rs");

crates/fayalite/examples/blinky.rs

@@ -1,11 +1,5 @@
 use clap::Parser;
-use fayalite::{
-    cli,
-    clock::{Clock, ClockDomain},
-    hdl_module,
-    int::{DynUInt, DynUIntType, IntCmp, IntTypeTrait, UInt},
-    reset::{SyncReset, ToReset},
-};
+use fayalite::{cli, prelude::*};
 
 #[hdl_module]
 fn blinky(clock_frequency: u64) {
@@ -19,21 +13,21 @@ fn blinky(clock_frequency: u64) {
         rst: rst.to_reset(),
     };
     let max_value = clock_frequency / 2 - 1;
-    let int_ty = DynUIntType::range_inclusive(0..=max_value);
+    let int_ty = UInt::range_inclusive(0..=max_value);
     #[hdl]
-    let counter: DynUInt = m.reg_builder().clock_domain(cd).reset(int_ty.literal(0));
+    let counter: UInt = reg_builder().clock_domain(cd).reset(0u8.cast_to(int_ty));
     #[hdl]
-    let output_reg: UInt<1> = m.reg_builder().clock_domain(cd).reset_default();
+    let output_reg: Bool = reg_builder().clock_domain(cd).reset(false);
     #[hdl]
     if counter.cmp_eq(max_value) {
-        m.connect_any(counter, 0u8);
-        m.connect(output_reg, !output_reg);
+        connect_any(counter, 0u8);
+        connect(output_reg, !output_reg);
     } else {
-        m.connect_any(counter, counter + 1_hdl_u1);
+        connect_any(counter, counter + 1_hdl_u1);
     }
     #[hdl]
-    let led: UInt<1> = m.output();
-    m.connect(led, output_reg);
+    let led: Bool = m.output();
+    connect(led, output_reg);
 }
 
 #[derive(Parser)]

crates/fayalite/src/_docs.rs

@@ -10,7 +10,7 @@
 //! function to add inputs/outputs and other components to that module.
 //!
 //! ```
-//! # use fayalite::{hdl_module, int::UInt};
+//! # use fayalite::prelude::*;
 //! #
 //! #[hdl_module]
 //! pub fn example_module() {
@@ -18,7 +18,7 @@
 //!     let an_input: UInt<10> = m.input(); // create an input that is a 10-bit unsigned integer
 //!     #[hdl]
 //!     let some_output: UInt<10> = m.output();
-//!     m.connect(some_output, an_input); // assigns the value of `an_input` to `some_output`
+//!     connect(some_output, an_input); // assigns the value of `an_input` to `some_output`
 //! }
 //! ```
 

crates/fayalite/src/_docs/modules/extern_module.rs

@@ -11,8 +11,6 @@
 //!  * [`parameter_raw_verilog()`][`ModuleBuilder::parameter_raw_verilog`]
 //!  * [`parameter()`][`ModuleBuilder::parameter`]
 //!
-//! These use the [`ExternModule`][`crate::module::ExternModule`] tag type.
-//!
 //! [inputs/outputs]: crate::_docs::modules::module_bodies::hdl_let_statements::inputs_outputs
 
 #[allow(unused)]

crates/fayalite/src/_docs/modules/module_bodies/hdl_array_expressions.rs

@@ -1,24 +1,24 @@
 //! # `#[hdl]` Array Expressions
 //!
-//! `#[hdl]` can be used on Array Expressions to construct an [`Array<[T; N]>`][Array] expression:
+//! `#[hdl]` can be used on Array Expressions to construct an [`Array<[T; N]>`][type@Array] expression:
 //!
 //! ```
-//! # use fayalite::{hdl_module, int::UInt, array::Array};
+//! # use fayalite::prelude::*;
 //! # #[hdl_module]
 //! # fn module() {
 //! #[hdl]
 //! let v: UInt<8> = m.input();
 //! #[hdl]
-//! let w: Array<[UInt<8>; 4]> = m.wire();
-//! m.connect(
+//! let w: Array<UInt<8>, 4> = wire();
+//! connect(
 //!     w,
 //!     #[hdl]
-//!     [4_hdl_u8, v, 3_hdl_u8, (v + 7_hdl_u8).cast()] // you can make an array like this
+//!     [4_hdl_u8, v, 3_hdl_u8, (v + 7_hdl_u8).cast_to_static()] // you can make an array like this
 //! );
-//! m.connect(
+//! connect(
 //!     w,
 //!     #[hdl]
-//!     [(v + 1_hdl_u8).cast(); 4] // or you can make an array repeat like this
+//!     [(v + 1_hdl_u8).cast_to_static(); 4] // or you can make an array repeat like this
 //! );
 //! # }
 //! ```

crates/fayalite/src/_docs/modules/module_bodies/hdl_if_statements.rs

@@ -3,8 +3,7 @@
 //! `#[hdl] if` statements behave similarly to Rust `if` statements, except they end up as muxes
 //! and stuff in the final hardware instead of being run when the fayalite module is being created.
 //!
-//! The condition of an `#[hdl] if` statement must have type [`UInt<1>`] or [`DynUInt`] with
-//! `width() == 1` or be an [expression][Expr] of one of those types.
+//! The condition of an `#[hdl] if` statement must have type [`Expr<Bool>`][Bool].
 //!
 //! `#[hdl] if` statements' bodies must evaluate to type `()` for now.
 //!
@@ -14,7 +13,4 @@
 //! [match]: super::hdl_match_statements
 
 #[allow(unused)]
-use crate::{
-    expr::Expr,
-    int::{DynUInt, UInt},
-};
+use crate::int::Bool;

crates/fayalite/src/_docs/modules/module_bodies/hdl_let_statements/inputs_outputs.rs

@@ -6,14 +6,14 @@
 //! so you should read it.
 //!
 //! ```
-//! # use fayalite::{hdl_module, int::UInt, expr::Expr, array::Array};
+//! # use fayalite::prelude::*;
 //! # #[hdl_module]
 //! # fn module() {
 //! #[hdl]
 //! let my_input: UInt<10> = m.input();
 //! let _: Expr<UInt<10>> = my_input; // my_input has type Expr<UInt<10>>
 //! #[hdl]
-//! let my_output: Array<[UInt<10>; 3]> = m.output();
+//! let my_output: Array<UInt<10>, 3> = m.output();
 //! # }
 //! ```
 //!

crates/fayalite/src/_docs/modules/module_bodies/hdl_let_statements/instances.rs

@@ -4,15 +4,15 @@
 //! you can create them like so:
 //!
 //! ```
-//! # use fayalite::{hdl_module, int::UInt, array::Array};
+//! # use fayalite::prelude::*;
 //! # #[hdl_module]
 //! # fn module() {
 //! #[hdl]
-//! let my_instance = m.instance(some_module());
+//! let my_instance = instance(some_module());
 //! // now you can use `my_instance`'s inputs/outputs like so:
 //! #[hdl]
 //! let v: UInt<3> = m.input();
-//! m.connect(my_instance.a, v);
+//! connect(my_instance.a, v);
 //! #[hdl_module]
 //! fn some_module() {
 //!     #[hdl]

crates/fayalite/src/_docs/modules/module_bodies/hdl_let_statements/memories.rs

@@ -7,12 +7,12 @@
 //!
 //! There are several different ways to create a memory:
 //!
-//! ## using [`ModuleBuilder::memory()`]
+//! ## using [`memory()`]
 //!
 //! This way you have to set the [`depth`][`MemBuilder::depth`] separately.
 //!
 //! ```
-//! # use fayalite::{hdl_module, int::UInt, clock::ClockDomain};
+//! # use fayalite::prelude::*;
 //! # #[hdl_module]
 //! # fn module() {
 //! // first, we need some IO
@@ -25,45 +25,45 @@
 //!
 //! // now create the memory
 //! #[hdl]
-//! let mut my_memory = m.memory();
+//! let mut my_memory = memory();
 //! my_memory.depth(256); // the memory has 256 elements
 //!
 //! let read_port = my_memory.new_read_port();
 //!
 //! // connect up the read port
-//! m.connect_any(read_port.addr, read_addr);
-//! m.connect(read_port.en, 1_hdl_u1);
-//! m.connect(read_port.clk, cd.clk);
-//! m.connect(read_data, read_port.data);
+//! connect_any(read_port.addr, read_addr);
+//! connect(read_port.en, true);
+//! connect(read_port.clk, cd.clk);
+//! connect(read_data, read_port.data);
 //!
 //! // we need more IO for the write port
 //! #[hdl]
 //! let write_addr: UInt<8> = m.input();
 //! #[hdl]
-//! let do_write: UInt<1> = m.input();
+//! let do_write: Bool = m.input();
 //! #[hdl]
 //! let write_data: UInt<8> = m.input();
 //!
 //! let write_port = my_memory.new_write_port();
 //!
-//! m.connect_any(write_port.addr, write_addr);
-//! m.connect(write_port.en, do_write);
-//! m.connect(write_port.clk, cd.clk);
-//! m.connect(write_port.data, write_port.data);
-//! m.connect(write_port.mask, 1_hdl_u1);
+//! connect_any(write_port.addr, write_addr);
+//! connect(write_port.en, do_write);
+//! connect(write_port.clk, cd.clk);
+//! connect(write_port.data, write_port.data);
+//! connect(write_port.mask, true);
 //! # }
 //! ```
 //!
-//! ## using [`ModuleBuilder::memory_array()`]
+//! ## using [`memory_array()`]
 //!
 //! this allows you to specify the memory's underlying array type directly.
 //!
 //! ```
-//! # use fayalite::{hdl_module, int::UInt, memory::MemBuilder};
+//! # use fayalite::prelude::*;
 //! # #[hdl_module]
 //! # fn module() {
 //! #[hdl]
-//! let mut my_memory: MemBuilder<[UInt<8>; 256]> = m.memory_array();
+//! let mut my_memory: MemBuilder<UInt<8>, ConstUsize<256>> = memory_array();
 //!
 //! let read_port = my_memory.new_read_port();
 //! // ...
@@ -72,25 +72,22 @@
 //! # }
 //! ```
 //!
-//! ## using [`ModuleBuilder::memory_with_init()`]
+//! ## using [`memory_with_init()`]
 //!
 //! This allows you to deduce the memory's array type from the data used to initialize the memory.
 //!
 //! ```
-//! # use fayalite::{hdl_module, int::UInt};
+//! # use fayalite::prelude::*;
 //! # #[hdl_module]
 //! # fn module() {
 //! # #[hdl]
 //! # let read_addr: UInt<2> = m.input();
 //! #[hdl]
-//! let mut my_memory = m.memory_with_init(
-//!     #[hdl]
-//!     [0x12_hdl_u8, 0x34_hdl_u8, 0x56_hdl_u8, 0x78_hdl_u8],
-//! );
+//! let mut my_memory = memory_with_init([0x12_hdl_u8, 0x34_hdl_u8, 0x56_hdl_u8, 0x78_hdl_u8]);
 //!
 //! let read_port = my_memory.new_read_port();
 //! // note that `read_addr` is `UInt<2>` since the memory only has 4 elements
-//! m.connect_any(read_port.addr, read_addr);
+//! connect_any(read_port.addr, read_addr);
 //! // ...
 //! let write_port = my_memory.new_write_port();
 //! // ...
@@ -98,4 +95,4 @@
 //! ```
 
 #[allow(unused)]
-use crate::{memory::MemBuilder, module::ModuleBuilder};
+use crate::prelude::*;

crates/fayalite/src/_docs/modules/module_bodies/hdl_let_statements/registers.rs

@@ -8,19 +8,19 @@
 //! Registers follow [connection semantics], which are unlike assignments in software, so you should read it.
 //!
 //! ```
-//! # use fayalite::{hdl_module, int::UInt, array::Array, clock::ClockDomain};
+//! # use fayalite::prelude::*;
 //! # #[hdl_module]
 //! # fn module() {
 //! # #[hdl]
-//! # let v: UInt<1> = m.input();
+//! # let v: Bool = m.input();
 //! #[hdl]
 //! let cd: ClockDomain = m.input();
 //! #[hdl]
-//! let my_register: UInt<8> = m.reg_builder().clock_domain(cd).reset(8_hdl_u8);
+//! let my_register: UInt<8> = reg_builder().clock_domain(cd).reset(8_hdl_u8);
 //! #[hdl]
 //! if v {
 //!     // my_register is only changed when both `v` is set and `cd`'s clock edge occurs.
-//!     m.connect(my_register, 0x45_hdl_u8);
+//!     connect(my_register, 0x45_hdl_u8);
 //! }
 //! # }
 //! ```

crates/fayalite/src/_docs/modules/module_bodies/hdl_let_statements/wires.rs

@@ -2,26 +2,26 @@
 //!
 //! Wires are kinda like variables, but unlike registers,
 //! they have no memory (they're combinatorial).
-//! You must [connect][`ModuleBuilder::connect`] to all wires, so they have a defined value.
+//! You must [connect] to all wires, so they have a defined value.
 //!
 //! Wires create a Rust variable with type [`Expr<T>`] where `T` is the type of the wire.
 //!
 //! Wires follow [connection semantics], which are unlike assignments in software, so you should read it.
 //!
 //! ```
-//! # use fayalite::{hdl_module, int::UInt, array::Array, clock::ClockDomain};
+//! # use fayalite::prelude::*;
 //! # #[hdl_module]
 //! # fn module() {
 //! # #[hdl]
-//! # let v: UInt<1> = m.input();
+//! # let v: Bool = m.input();
 //! #[hdl]
-//! let my_wire: UInt<8> = m.wire();
+//! let my_wire: UInt<8> = wire();
 //! #[hdl]
 //! if v {
-//!     m.connect(my_wire, 0x45_hdl_u8);
+//!     connect(my_wire, 0x45_hdl_u8);
 //! } else {
 //!     // wires must be connected to under all conditions
-//!     m.connect(my_wire, 0x23_hdl_u8);
+//!     connect(my_wire, 0x23_hdl_u8);
 //! }
 //! # }
 //! ```
@@ -29,4 +29,4 @@
 //! [connection semantics]: crate::_docs::semantics::connection_semantics
 
 #[allow(unused)]
-use crate::{expr::Expr, module::ModuleBuilder};
+use crate::prelude::*;

crates/fayalite/src/_docs/modules/module_bodies/hdl_literals.rs

@@ -2,8 +2,7 @@
 //!
 //! You can have integer literals with an arbitrary number of bits like so:
 //!
-//! `_hdl`-suffixed literals have type [`Expr<UInt<N>>`] or [`Expr<SInt<N>>`]
-//! ... which are basically just [`UInt<N>`] or [`SInt<N>`] converted to an expression.
+//! `_hdl`-suffixed literals have type [`Expr<UInt<N>>`] or [`Expr<SInt<N>>`].
 //!
 //! ```
 //! # #[fayalite::hdl_module]

crates/fayalite/src/_docs/modules/module_bodies/hdl_struct_variant_expressions.rs

@@ -2,27 +2,24 @@
 //!
 //! Note: Structs are also known as [Bundles] when used in Fayalite, the Bundle name comes from [FIRRTL].
 //!
-//! [Bundles]: crate::bundle::BundleValue
+//! [Bundles]: crate::bundle::BundleType
 //! [FIRRTL]: https://github.com/chipsalliance/firrtl-spec
 //!
-//! `#[hdl]` can be used on Struct/Variant Expressions to construct a value of that
-//! struct/variant's type. They can also be used on tuples.
+//! `#[hdl]` can be used on Struct Expressions to construct a value of that
+//! struct's type. They can also be used on tuples.
 //!
 //! ```
-//! # use fayalite::{hdl_module, int::UInt, array::Array, ty::Value};
-//! #[derive(Value, Clone, PartialEq, Eq, Hash, Debug)]
-//! #[hdl(static)]
+//! # use fayalite::prelude::*;
+//! #[hdl]
 //! pub struct MyStruct {
 //!     pub a: UInt<8>,
 //!     pub b: UInt<16>,
 //! }
 //!
-//! #[derive(Value, Clone, PartialEq, Eq, Hash, Debug)]
+//! #[hdl]
 //! pub enum MyEnum {
 //!     A,
-//!     B {
-//!         v: UInt<32>,
-//!     },
+//!     B(UInt<32>),
 //! }
 //!
 //! # #[hdl_module]
@@ -30,8 +27,8 @@
 //! #[hdl]
 //! let v: UInt<8> = m.input();
 //! #[hdl]
-//! let my_struct: MyStruct = m.wire();
-//! m.connect(
+//! let my_struct: MyStruct = wire();
+//! connect(
 //!     my_struct,
 //!     #[hdl]
 //!     MyStruct {
@@ -40,15 +37,14 @@
 //!     },
 //! );
 //! #[hdl]
-//! let my_enum: MyEnum = m.wire();
-//! m.connect(
+//! let my_enum: MyEnum = wire();
+//! connect(
 //!     my_enum,
-//!     #[hdl]
-//!     MyEnum::B { v: 12345678_hdl_u32 },
+//!     MyEnum.B(12345678_hdl_u32),
 //! );
 //! #[hdl]
-//! let some_tuple: (UInt<4>, UInt<12>) = m.wire();
-//! m.connect(
+//! let some_tuple: (UInt<4>, UInt<12>) = wire();
+//! connect(
 //!     some_tuple,
 //!     #[hdl]
 //!     (12_hdl_u4, 3421_hdl_u12),
@@ -57,4 +53,4 @@
 //! ```
 
 #[allow(unused)]
-use crate::array::Array;
+use crate::prelude::*;

crates/fayalite/src/_docs/modules/normal_module.rs

@@ -1,6 +1,4 @@
 //! # Normal Modules
 //!
-//! These use the [`NormalModule`][`crate::module::NormalModule`] tag type.
-//!
 //! See also: [Extern Modules][`super::extern_module`]
 //! See also: [Module Bodies][`super::module_bodies`]

crates/fayalite/src/_docs/semantics/connection_semantics.rs

@@ -20,62 +20,60 @@
 //! Connection Semantics Example:
 //!
 //! ```
-//! # use fayalite::{hdl_module, int::UInt};
+//! # use fayalite::prelude::*;
 //! # #[hdl_module]
 //! # fn module() {
 //! #[hdl]
-//! let a: UInt<8> = m.wire();
+//! let a: UInt<8> = wire();
 //! #[hdl]
 //! let b: UInt<8> = m.output();
 //!
 //! // doesn't actually affect anything, since `a` is completely overwritten later
-//! m.connect(a, 5_hdl_u8);
+//! connect(a, 5_hdl_u8);
 //!
 //! // here `a` has value `7` since the last connection assigns
 //! // `7` to `a`, so `b` has value `7` too.
-//! m.connect(b, a);
+//! connect(b, a);
 //!
 //! // this is the last `connect` to `a`, so this `connect` determines `a`'s value
-//! m.connect(a, 7_hdl_u8);
+//! connect(a, 7_hdl_u8);
 //! # }
 //! ```
 //!
 //! # Conditional Connection Semantics
 //!
 //! ```
-//! # use fayalite::{hdl_module, int::UInt};
+//! # use fayalite::prelude::*;
 //! # #[hdl_module]
 //! # fn module() {
 //! #[hdl]
-//! let cond: UInt<1> = m.input();
+//! let cond: Bool = m.input();
 //! #[hdl]
-//! let a: UInt<8> = m.wire();
+//! let a: UInt<8> = wire();
 //! #[hdl]
 //! let b: UInt<8> = m.output();
 //!
 //! // this is the last `connect` to `a` when `cond` is `0`
-//! m.connect(a, 5_hdl_u8);
+//! connect(a, 5_hdl_u8);
 //!
 //! // here `a` has value `7` if `cond` is `1` since the last connection assigns
 //! // `7` to `a`, so `b` has value `7` too, otherwise `a` (and therefore `b`)
 //! // have value `5` since then the connection assigning `7` is in a
 //! // conditional block where the condition doesn't hold.
-//! m.connect(b, a);
+//! connect(b, a);
 //!
 //! #[hdl]
 //! if cond {
 //!     // this is the last `connect` to `a` when `cond` is `1`
-//!     m.connect(a, 7_hdl_u8);
+//!     connect(a, 7_hdl_u8);
 //! }
 //! # }
 //! ```
 //!
 //! [conditional block]: self#conditional-connection-semantics
-//! [`connect()`]: ModuleBuilder::connect
-//! [`connect_any()`]: ModuleBuilder::connect_any
 //! [wire]: crate::_docs::modules::module_bodies::hdl_let_statements::wires
 //! [if]: crate::_docs::modules::module_bodies::hdl_if_statements
 //! [FIRRTL]: https://github.com/chipsalliance/firrtl-spec
 
 #[allow(unused)]
-use crate::module::ModuleBuilder;
+use crate::prelude::*;

crates/fayalite/src/annotations.rs

@@ -1,7 +1,7 @@
 // SPDX-License-Identifier: LGPL-3.0-or-later
 // See Notices.txt for copyright information
 use crate::{
-    expr::Target,
+    expr::target::Target,
     intern::{Intern, Interned},
 };
 use serde::{Deserialize, Serialize};

crates/fayalite/src/array.rs

@@ -1,671 +1,234 @@
 // SPDX-License-Identifier: LGPL-3.0-or-later
 // See Notices.txt for copyright information
+
 use crate::{
-    bundle::{BundleType, BundleValue},
-    expr::{
-        ops::{ArrayIndex, ArrayLiteral, ExprIndex},
-        Expr, ToExpr,
-    },
-    intern::{Intern, Interned, InternedCompare, Memoize},
-    module::{
-        transform::visit::{Fold, Folder, Visit, Visitor},
-        ModuleBuilder, NormalModule,
-    },
+    expr::{ops::ArrayIndex, Expr, ToExpr},
+    int::{DynSize, KnownSize, Size},
+    intern::{Intern, Interned, LazyInterned},
+    module::transform::visit::{Fold, Folder, Visit, Visitor},
     source_location::SourceLocation,
     ty::{
-        CanonicalType, CanonicalTypeKind, CanonicalValue, Connect, DynCanonicalType,
-        DynCanonicalValue, DynType, DynValueTrait, MatchVariantWithoutScope, StaticType,
-        StaticValue, Type, TypeEnum, Value, ValueEnum,
+        CanonicalType, MatchVariantWithoutScope, StaticType, Type, TypeProperties, TypeWithDeref,
     },
-    util::{ConstBool, GenericConstBool, MakeMutSlice},
-};
-use bitvec::{slice::BitSlice, vec::BitVec};
-use std::{
-    any::Any,
-    borrow::{Borrow, BorrowMut},
-    fmt,
-    hash::Hash,
-    marker::PhantomData,
-    ops::IndexMut,
-    sync::Arc,
+    util::ConstUsize,
 };
+use std::ops::Index;
 
-mod sealed {
-    pub trait Sealed {}
+#[derive(Copy, Clone, PartialEq, Eq, Hash)]
+pub struct ArrayType<T: Type = CanonicalType, Len: Size = DynSize> {
+    element: LazyInterned<T>,
+    len: Len::SizeType,
+    type_properties: TypeProperties,
 }
 
-pub trait ValueArrayOrSlice:
-    sealed::Sealed
-    + BorrowMut<[<Self as ValueArrayOrSlice>::Element]>
-    + AsRef<[<Self as ValueArrayOrSlice>::Element]>
-    + AsMut<[<Self as ValueArrayOrSlice>::Element]>
-    + Hash
-    + fmt::Debug
-    + Eq
-    + Send
-    + Sync
-    + 'static
-    + IndexMut<usize, Output = <Self as ValueArrayOrSlice>::Element>
-    + ToOwned
-    + InternedCompare
-{
-    type Element: Value<Type = <Self as ValueArrayOrSlice>::ElementType>;
-    type ElementType: Type<Value = <Self as ValueArrayOrSlice>::Element>;
-    type LenType: 'static + Copy + Ord + fmt::Debug + Hash + Send + Sync;
-    type Match: 'static
-        + Clone
-        + Eq
-        + fmt::Debug
-        + Hash
-        + Send
-        + Sync
-        + BorrowMut<[Expr<Self::Element>]>;
-    type MaskVA: ValueArrayOrSlice<
-            Element = <Self::ElementType as Type>::MaskValue,
-            ElementType = <Self::ElementType as Type>::MaskType,
-            LenType = Self::LenType,
-            MaskVA = Self::MaskVA,
-        > + ?Sized;
-    type IsStaticLen: GenericConstBool;
-    const FIXED_LEN_TYPE: Option<Self::LenType>;
-    fn make_match(array: Expr<Array<Self>>) -> Self::Match;
-    fn len_from_len_type(v: Self::LenType) -> usize;
-    #[allow(clippy::result_unit_err)]
-    fn try_len_type_from_len(v: usize) -> Result<Self::LenType, ()>;
-    fn len_type(&self) -> Self::LenType;
-    fn len(&self) -> usize;
-    fn is_empty(&self) -> bool;
-    fn iter(&self) -> std::slice::Iter<Self::Element> {
-        Borrow::<[_]>::borrow(self).iter()
-    }
-    fn clone_to_arc(&self) -> Arc<Self>;
-    fn arc_make_mut(v: &mut Arc<Self>) -> &mut Self;
-    fn arc_to_arc_slice(self: Arc<Self>) -> Arc<[Self::Element]>;
-}
-
-impl<T> sealed::Sealed for [T] {}
-
-impl<V: Value> ValueArrayOrSlice for [V]
-where
-    V::Type: Type<Value = V>,
-{
-    type Element = V;
-    type ElementType = V::Type;
-    type LenType = usize;
-    type Match = Box<[Expr<V>]>;
-    type MaskVA = [<Self::ElementType as Type>::MaskValue];
-    type IsStaticLen = ConstBool<false>;
-    const FIXED_LEN_TYPE: Option<Self::LenType> = None;
-
-    fn make_match(array: Expr<Array<Self>>) -> Self::Match {
-        (0..array.canonical_type().len())
-            .map(|index| ArrayIndex::<V::Type>::new_unchecked(array.canonical(), index).to_expr())
-            .collect()
-    }
-
-    fn len_from_len_type(v: Self::LenType) -> usize {
-        v
-    }
-
-    fn try_len_type_from_len(v: usize) -> Result<Self::LenType, ()> {
-        Ok(v)
-    }
-
-    fn len_type(&self) -> Self::LenType {
-        self.len()
-    }
-
-    fn len(&self) -> usize {
-        <[_]>::len(self)
-    }
-
-    fn is_empty(&self) -> bool {
-        <[_]>::is_empty(self)
-    }
-
-    fn clone_to_arc(&self) -> Arc<Self> {
-        Arc::from(self)
-    }
-
-    fn arc_make_mut(v: &mut Arc<Self>) -> &mut Self {
-        MakeMutSlice::make_mut_slice(v)
-    }
-
-    fn arc_to_arc_slice(self: Arc<Self>) -> Arc<[Self::Element]> {
-        self
+impl<T: Type, Len: Size> std::fmt::Debug for ArrayType<T, Len> {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        write!(f, "Array<{:?}, {}>", self.element, self.len())
     }
 }
 
-impl<T, const N: usize> sealed::Sealed for [T; N] {}
+pub type Array<
+    T = CanonicalType,
+    const LEN: usize = { <DynSize as crate::util::GenericConstUsize>::VALUE },
+> = ArrayType<T, ConstUsize<LEN>>;
 
-impl<V: Value, const N: usize> ValueArrayOrSlice for [V; N]
-where
-    V::Type: Type<Value = V>,
-{
-    type Element = V;
-    type ElementType = V::Type;
-    type LenType = ();
-    type Match = [Expr<V>; N];
-    type MaskVA = [<Self::ElementType as Type>::MaskValue; N];
-    type IsStaticLen = ConstBool<true>;
-    const FIXED_LEN_TYPE: Option<Self::LenType> = Some(());
+#[allow(non_upper_case_globals)]
+pub const Array: ArrayWithoutGenerics = ArrayWithoutGenerics;
+#[allow(non_upper_case_globals)]
+pub const ArrayType: ArrayWithoutGenerics = ArrayWithoutGenerics;
 
-    fn make_match(array: Expr<Array<Self>>) -> Self::Match {
-        std::array::from_fn(|index| {
-            ArrayIndex::<V::Type>::new_unchecked(array.canonical(), index).to_expr()
-        })
-    }
-
-    fn len_from_len_type(_v: Self::LenType) -> usize {
-        N
-    }
-
-    fn try_len_type_from_len(v: usize) -> Result<Self::LenType, ()> {
-        if v == N {
-            Ok(())
-        } else {
-            Err(())
-        }
-    }
-
-    fn len_type(&self) -> Self::LenType {}
-
-    fn len(&self) -> usize {
-        N
-    }
-
-    fn is_empty(&self) -> bool {
-        N == 0
-    }
-
-    fn clone_to_arc(&self) -> Arc<Self> {
-        Arc::new(self.clone())
-    }
-
-    fn arc_make_mut(v: &mut Arc<Self>) -> &mut Self {
-        Arc::make_mut(v)
-    }
-
-    fn arc_to_arc_slice(self: Arc<Self>) -> Arc<[Self::Element]> {
-        self
-    }
-}
-
-#[derive(Debug, PartialEq, Eq, Hash)]
-pub struct ArrayType<VA: ValueArrayOrSlice + ?Sized> {
-    element: VA::ElementType,
-    len: VA::LenType,
-    bit_width: usize,
-}
-
-pub trait ArrayTypeTrait:
-    Type<
-        CanonicalType = ArrayType<[DynCanonicalValue]>,
-        Value = Array<<Self as ArrayTypeTrait>::ValueArrayOrSlice>,
-        CanonicalValue = Array<[DynCanonicalValue]>,
-        MaskType = ArrayType<
-            <<Self as ArrayTypeTrait>::ValueArrayOrSlice as ValueArrayOrSlice>::MaskVA,
-        >,
-    > + From<ArrayType<<Self as ArrayTypeTrait>::ValueArrayOrSlice>>
-    + Into<ArrayType<<Self as ArrayTypeTrait>::ValueArrayOrSlice>>
-    + BorrowMut<ArrayType<<Self as ArrayTypeTrait>::ValueArrayOrSlice>>
-    + sealed::Sealed
-    + Connect<Self>
-{
-    type ValueArrayOrSlice: ValueArrayOrSlice<Element = Self::Element, ElementType = Self::ElementType>
-        + ?Sized;
-    type Element: Value<Type = Self::ElementType>;
-    type ElementType: Type<Value = Self::Element>;
-}
-
-impl<VA: ValueArrayOrSlice + ?Sized> sealed::Sealed for ArrayType<VA> {}
-
-impl<VA: ValueArrayOrSlice + ?Sized> ArrayTypeTrait for ArrayType<VA> {
-    type ValueArrayOrSlice = VA;
-    type Element = VA::Element;
-    type ElementType = VA::ElementType;
-}
-
-impl<VA: ValueArrayOrSlice + ?Sized> Clone for ArrayType<VA> {
-    fn clone(&self) -> Self {
-        Self {
-            element: self.element.clone(),
-            len: self.len,
-            bit_width: self.bit_width,
-        }
-    }
-}
-
-impl<VA: ValueArrayOrSlice + ?Sized> Copy for ArrayType<VA> where VA::ElementType: Copy {}
-
-impl<VA: ValueArrayOrSlice + ?Sized> ArrayType<VA> {
-    pub fn element(&self) -> &VA::ElementType {
-        &self.element
-    }
-    pub fn len(&self) -> usize {
-        VA::len_from_len_type(self.len)
-    }
-    pub fn is_empty(&self) -> bool {
-        self.len() == 0
-    }
-    pub fn bit_width(&self) -> usize {
-        self.bit_width
-    }
-    pub fn into_slice_type(self) -> ArrayType<[VA::Element]> {
-        ArrayType {
-            len: self.len(),
-            element: self.element,
-            bit_width: self.bit_width,
-        }
-    }
-    #[track_caller]
-    pub fn new_with_len(element: VA::ElementType, len: usize) -> Self {
-        Self::new_with_len_type(
-            element,
-            VA::try_len_type_from_len(len).expect("length should match"),
-        )
-    }
-    #[track_caller]
-    pub fn new_with_len_type(element: VA::ElementType, len: VA::LenType) -> Self {
-        let Some(bit_width) = VA::len_from_len_type(len).checked_mul(element.bit_width()) else {
-            panic!("array is too big: bit-width overflowed");
+impl<T: Type, Len: Size> ArrayType<T, Len> {
+    const fn make_type_properties(element: TypeProperties, len: usize) -> TypeProperties {
+        let TypeProperties {
+            is_passive,
+            is_storable,
+            is_castable_from_bits,
+            bit_width,
+        } = element;
+        let Some(bit_width) = bit_width.checked_mul(len) else {
+            panic!("array too big");
         };
-        ArrayType {
-            element,
-            len,
+        TypeProperties {
+            is_passive,
+            is_storable,
+            is_castable_from_bits,
             bit_width,
         }
     }
+    pub fn new(element: T, len: Len::SizeType) -> Self {
+        let type_properties =
+            Self::make_type_properties(element.canonical().type_properties(), Len::as_usize(len));
+        Self {
+            element: LazyInterned::Interned(element.intern_sized()),
+            len,
+            type_properties,
+        }
+    }
+    pub fn element(&self) -> T {
+        *self.element
+    }
+    pub fn len(self) -> usize {
+        Len::as_usize(self.len)
+    }
+    pub fn is_empty(self) -> bool {
+        self.len() == 0
+    }
+    pub fn type_properties(self) -> TypeProperties {
+        self.type_properties
+    }
+    pub fn as_dyn_array(self) -> Array {
+        Array::new_dyn(self.element().canonical(), self.len())
+    }
+    pub fn can_connect<T2: Type, Len2: Size>(self, rhs: ArrayType<T2, Len2>) -> bool {
+        self.len() == rhs.len()
+            && self
+                .element()
+                .canonical()
+                .can_connect(rhs.element().canonical())
+    }
 }
 
-impl<VA: ValueArrayOrSlice + ?Sized, State: ?Sized + Folder> Fold<State> for ArrayType<VA>
-where
-    VA::ElementType: Fold<State>,
-{
+impl<T: Type, Len: KnownSize> ArrayType<T, Len> {
+    pub fn new_static(element: T) -> Self {
+        Self::new(element, Len::SizeType::default())
+    }
+}
+
+impl<T: StaticType, Len: KnownSize> StaticType for ArrayType<T, Len> {
+    const TYPE: Self = Self {
+        element: LazyInterned::new_lazy(&|| T::TYPE.intern_sized()),
+        len: Len::SIZE,
+        type_properties: Self::TYPE_PROPERTIES,
+    };
+    const MASK_TYPE: Self::MaskType = ArrayType::<T::MaskType, Len> {
+        element: LazyInterned::new_lazy(&|| T::MASK_TYPE.intern_sized()),
+        len: Len::SIZE,
+        type_properties: Self::MASK_TYPE_PROPERTIES,
+    };
+    const TYPE_PROPERTIES: TypeProperties =
+        Self::make_type_properties(T::TYPE_PROPERTIES, Len::VALUE);
+    const MASK_TYPE_PROPERTIES: TypeProperties =
+        Self::make_type_properties(T::MASK_TYPE_PROPERTIES, Len::VALUE);
+}
+
+impl<T: Type> Array<T> {
+    pub fn new_dyn(element: T, len: usize) -> Self {
+        Self::new(element, len)
+    }
+}
+
+impl<T: Type + Fold<State>, Len: Size, State: Folder + ?Sized> Fold<State> for ArrayType<T, Len> {
     fn fold(self, state: &mut State) -> Result<Self, State::Error> {
         state.fold_array_type(self)
     }
-    fn default_fold(self, state: &mut State) -> Result<Self, State::Error> {
-        Ok(Self::new_with_len_type(self.element.fold(state)?, self.len))
+
+    fn default_fold(self, state: &mut State) -> Result<Self, <State as Folder>::Error> {
+        Ok(ArrayType::new(self.element().fold(state)?, self.len))
     }
 }
 
-impl<VA: ValueArrayOrSlice + ?Sized, State: ?Sized + Visitor> Visit<State> for ArrayType<VA>
-where
-    VA::ElementType: Visit<State>,
+impl<T: Type + Visit<State>, Len: Size, State: Visitor + ?Sized> Visit<State>
+    for ArrayType<T, Len>
 {
     fn visit(&self, state: &mut State) -> Result<(), State::Error> {
         state.visit_array_type(self)
     }
+
     fn default_visit(&self, state: &mut State) -> Result<(), State::Error> {
-        self.element.visit(state)
+        self.element().visit(state)
     }
 }
 
-impl<V: Value<Type: Type<Value = V>>, const N: usize> ArrayType<[V; N]> {
-    pub fn new_array(element: V::Type) -> Self {
-        ArrayType::new_with_len_type(element, ())
-    }
-}
-
-impl<V: StaticValue, const N: usize> StaticType for ArrayType<[V; N]> {
-    fn static_type() -> Self {
-        Self::new_array(StaticType::static_type())
-    }
-}
-
-impl<V: Value<Type: Type<Value = V>>> ArrayType<[V]> {
-    pub fn new_slice(element: V::Type, len: usize) -> Self {
-        ArrayType::new_with_len_type(element, len)
-    }
-}
-
-impl<VA: ValueArrayOrSlice + ?Sized> Type for ArrayType<VA> {
-    type CanonicalType = ArrayType<[DynCanonicalValue]>;
-    type Value = Array<VA>;
-    type CanonicalValue = Array<[DynCanonicalValue]>;
-    type MaskType = ArrayType<VA::MaskVA>;
-    type MaskValue = Array<VA::MaskVA>;
-    type MatchVariant = VA::Match;
+impl<T: Type, Len: Size> Type for ArrayType<T, Len> {
+    type BaseType = Array;
+    type MaskType = ArrayType<T::MaskType, Len>;
+    type MatchVariant = Len::ArrayMatch<T>;
     type MatchActiveScope = ();
-    type MatchVariantAndInactiveScope = MatchVariantWithoutScope<VA::Match>;
+    type MatchVariantAndInactiveScope = MatchVariantWithoutScope<Len::ArrayMatch<T>>;
     type MatchVariantsIter = std::iter::Once<Self::MatchVariantAndInactiveScope>;
 
-    fn match_variants<IO: BundleValue>(
-        this: Expr<Self::Value>,
-        module_builder: &mut ModuleBuilder<IO, NormalModule>,
+    fn match_variants(
+        this: Expr<Self>,
         source_location: SourceLocation,
-    ) -> Self::MatchVariantsIter
-    where
-        IO::Type: BundleType<Value = IO>,
-    {
-        let _ = module_builder;
+    ) -> Self::MatchVariantsIter {
+        let base = Expr::as_dyn_array(this);
+        let base_ty = Expr::ty(base);
         let _ = source_location;
-        std::iter::once(MatchVariantWithoutScope(VA::make_match(this)))
+        let retval = Vec::from_iter((0..base_ty.len()).map(|i| ArrayIndex::new(base, i).to_expr()));
+        std::iter::once(MatchVariantWithoutScope(
+            Len::ArrayMatch::<T>::try_from(retval)
+                .ok()
+                .expect("unreachable"),
+        ))
     }
 
     fn mask_type(&self) -> Self::MaskType {
-        #[derive(Clone, Hash, Eq, PartialEq)]
-        struct ArrayMaskTypeMemoize<T: ArrayTypeTrait>(PhantomData<T>);
-        impl<T: ArrayTypeTrait> Copy for ArrayMaskTypeMemoize<T> {}
-        impl<T: ArrayTypeTrait> Memoize for ArrayMaskTypeMemoize<T> {
-            type Input = ArrayType<T::ValueArrayOrSlice>;
-            type InputOwned = ArrayType<T::ValueArrayOrSlice>;
-            type Output = <ArrayType<T::ValueArrayOrSlice> as Type>::MaskType;
-
-            fn inner(self, input: &Self::Input) -> Self::Output {
-                ArrayType::new_with_len_type(input.element.mask_type(), input.len)
-            }
-        }
-        ArrayMaskTypeMemoize::<Self>(PhantomData).get(self)
+        ArrayType::new(self.element().mask_type(), self.len)
     }
 
-    fn canonical(&self) -> Self::CanonicalType {
-        ArrayType {
-            element: self.element.canonical_dyn(),
-            len: self.len(),
-            bit_width: self.bit_width,
-        }
+    fn canonical(&self) -> CanonicalType {
+        CanonicalType::Array(Array::new_dyn(self.element().canonical(), self.len()))
     }
 
-    fn source_location(&self) -> SourceLocation {
+    #[track_caller]
+    fn from_canonical(canonical_type: CanonicalType) -> Self {
+        let CanonicalType::Array(array) = canonical_type else {
+            panic!("expected array");
+        };
+        Self::new(
+            T::from_canonical(array.element()),
+            Len::from_usize(array.len()),
+        )
+    }
+    fn source_location() -> SourceLocation {
         SourceLocation::builtin()
     }
+}
 
-    fn type_enum(&self) -> TypeEnum {
-        TypeEnum::ArrayType(self.canonical())
-    }
-
-    fn from_canonical_type(t: Self::CanonicalType) -> Self {
-        Self {
-            element: VA::ElementType::from_dyn_canonical_type(t.element),
-            len: VA::try_len_type_from_len(t.len).expect("length should match"),
-            bit_width: t.bit_width,
-        }
-    }
-
-    fn as_dyn_canonical_type_impl(this: &Self) -> Option<&dyn DynCanonicalType> {
-        Some(<dyn Any>::downcast_ref::<ArrayType<[DynCanonicalValue]>>(
-            this,
-        )?)
+impl<T: Type, Len: Size> TypeWithDeref for ArrayType<T, Len> {
+    fn expr_deref(this: &Expr<Self>) -> &Self::MatchVariant {
+        let base = Expr::as_dyn_array(*this);
+        let base_ty = Expr::ty(base);
+        let retval = Vec::from_iter((0..base_ty.len()).map(|i| ArrayIndex::new(base, i).to_expr()));
+        Interned::<_>::into_inner(Intern::intern_sized(
+            Len::ArrayMatch::<T>::try_from(retval)
+                .ok()
+                .expect("unreachable"),
+        ))
     }
 }
 
-impl<Lhs: ValueArrayOrSlice + ?Sized, Rhs: ValueArrayOrSlice + ?Sized> Connect<ArrayType<Rhs>>
-    for ArrayType<Lhs>
-{
-}
+#[derive(Copy, Clone, PartialEq, Eq, Hash, Debug, Default)]
+pub struct ArrayWithoutGenerics;
 
-impl CanonicalType for ArrayType<[DynCanonicalValue]> {
-    const CANONICAL_TYPE_KIND: CanonicalTypeKind = CanonicalTypeKind::ArrayType;
-}
+impl<T: Type> Index<T> for ArrayWithoutGenerics {
+    type Output = ArrayWithoutLen<T>;
 
-#[derive(Debug, PartialEq, Eq, Hash)]
-pub struct Array<VA: ValueArrayOrSlice + ?Sized> {
-    element_ty: VA::ElementType,
-    value: Arc<VA>,
-}
-
-impl<VA: ValueArrayOrSlice + ?Sized> Clone for Array<VA> {
-    fn clone(&self) -> Self {
-        Self {
-            element_ty: self.element_ty.clone(),
-            value: self.value.clone(),
-        }
+    fn index(&self, element: T) -> &Self::Output {
+        Interned::<_>::into_inner(Intern::intern_sized(ArrayWithoutLen { element }))
     }
 }
 
-impl<VA: ValueArrayOrSlice + ?Sized> ToExpr for Array<VA> {
-    type Type = ArrayType<VA>;
+#[derive(Copy, Clone, PartialEq, Eq, Hash, Debug)]
+pub struct ArrayWithoutLen<T: Type> {
+    element: T,
+}
 
-    fn ty(&self) -> Self::Type {
-        ArrayType::new_with_len_type(self.element_ty.clone(), self.value.len_type())
-    }
+impl<T: Type> Index<usize> for ArrayWithoutLen<T> {
+    type Output = Array<T>;
 
-    fn to_expr(&self) -> Expr<<Self::Type as Type>::Value> {
-        Expr::from_value(self)
+    fn index(&self, len: usize) -> &Self::Output {
+        Interned::<_>::into_inner(Intern::intern_sized(Array::new_dyn(self.element, len)))
     }
 }
 
-impl<VA: ValueArrayOrSlice + ?Sized> Value for Array<VA> {
-    fn to_canonical(&self) -> <Self::Type as Type>::CanonicalValue {
-        Array {
-            element_ty: self.element_ty.canonical_dyn(),
-            value: AsRef::<[_]>::as_ref(&*self.value)
-                .iter()
-                .map(|v| v.to_canonical_dyn())
-                .collect(),
-        }
-    }
-    fn to_bits_impl(this: &Self) -> Interned<BitSlice> {
-        #[derive(Hash, Eq, PartialEq)]
-        struct ArrayToBitsMemoize<VA: ValueArrayOrSlice + ?Sized>(PhantomData<VA>);
-        impl<VA: ValueArrayOrSlice + ?Sized> Clone for ArrayToBitsMemoize<VA> {
-            fn clone(&self) -> Self {
-                *self
-            }
-        }
-        impl<VA: ValueArrayOrSlice + ?Sized> Copy for ArrayToBitsMemoize<VA> {}
-        impl<VA: ValueArrayOrSlice + ?Sized> Memoize for ArrayToBitsMemoize<VA> {
-            type Input = Array<VA>;
-            type InputOwned = Array<VA>;
-            type Output = Interned<BitSlice>;
-
-            fn inner(self, input: &Self::Input) -> Self::Output {
-                let mut bits = BitVec::with_capacity(input.ty().bit_width());
-                for element in AsRef::<[_]>::as_ref(&*input.value).iter() {
-                    bits.extend_from_bitslice(&element.to_bits());
-                }
-                Intern::intern_owned(bits)
-            }
-        }
-        ArrayToBitsMemoize::<VA>(PhantomData).get(this)
-    }
-}
-
-impl CanonicalValue for Array<[DynCanonicalValue]> {
-    fn value_enum_impl(this: &Self) -> ValueEnum {
-        ValueEnum::Array(this.clone())
-    }
-    fn to_bits_impl(this: &Self) -> Interned<BitSlice> {
-        Value::to_bits_impl(this)
-    }
-}
-
-impl<VA: ValueArrayOrSlice + ?Sized> Array<VA> {
-    pub fn element_ty(&self) -> &VA::ElementType {
-        &self.element_ty
-    }
-    pub fn len(&self) -> usize {
-        VA::len_from_len_type(self.value.len_type())
-    }
-    pub fn is_empty(&self) -> bool {
-        self.len() == 0
-    }
-    pub fn value(&self) -> &Arc<VA> {
-        &self.value
-    }
-    pub fn set_element(&mut self, index: usize, element: VA::Element) {
-        assert_eq!(self.element_ty, element.ty());
-        VA::arc_make_mut(&mut self.value)[index] = element;
-    }
-    pub fn new(element_ty: VA::ElementType, value: Arc<VA>) -> Self {
-        for element in value.iter() {
-            assert_eq!(element_ty, element.ty());
-        }
-        Self { element_ty, value }
-    }
-    pub fn into_slice(self) -> Array<[VA::Element]> {
-        Array {
-            element_ty: self.element_ty,
-            value: self.value.arc_to_arc_slice(),
-        }
-    }
-}
-
-impl<VA: ValueArrayOrSlice + ?Sized, T: Into<Arc<VA>>> From<T> for Array<VA>
+impl<T: Type, const LEN: usize> Index<ConstUsize<LEN>> for ArrayWithoutLen<T>
 where
-    VA::Element: StaticValue,
+    ConstUsize<LEN>: KnownSize,
 {
-    fn from(value: T) -> Self {
-        Self::new(StaticType::static_type(), value.into())
-    }
-}
-
-impl<E: ToExpr<Type = T>, T: StaticType<MaskType: StaticType>> ToExpr for [E] {
-    type Type = ArrayType<[T::Value]>;
-
-    fn ty(&self) -> Self::Type {
-        ArrayType::new_with_len_type(StaticType::static_type(), self.len())
-    }
-
-    fn to_expr(&self) -> Expr<<Self::Type as Type>::Value> {
-        let elements = Intern::intern_owned(Vec::from_iter(
-            self.iter().map(|v| v.to_expr().to_canonical_dyn()),
-        ));
-        ArrayLiteral::new_unchecked(elements, self.ty()).to_expr()
-    }
-}
-
-impl<E: ToExpr<Type = T>, T: StaticType<MaskType: StaticType>> ToExpr for Vec<E> {
-    type Type = ArrayType<[T::Value]>;
-
-    fn ty(&self) -> Self::Type {
-        <[E]>::ty(self)
-    }
-
-    fn to_expr(&self) -> Expr<<Self::Type as Type>::Value> {
-        <[E]>::to_expr(self)
-    }
-}
-
-impl<E: ToExpr<Type = T>, T: StaticType<MaskType: StaticType>, const N: usize> ToExpr for [E; N] {
-    type Type = ArrayType<[T::Value; N]>;
-
-    fn ty(&self) -> Self::Type {
-        ArrayType::new_with_len_type(StaticType::static_type(), ())
-    }
-
-    fn to_expr(&self) -> Expr<<Self::Type as Type>::Value> {
-        let elements = Intern::intern_owned(Vec::from_iter(
-            self.iter().map(|v| v.to_expr().to_canonical_dyn()),
-        ));
-        ArrayLiteral::new_unchecked(elements, self.ty()).to_expr()
-    }
-}
-
-#[derive(Clone, Debug)]
-pub struct ArrayIntoIter<VA: ValueArrayOrSlice> {
-    array: Arc<VA>,
-    indexes: std::ops::Range<usize>,
-}
-
-impl<VA: ValueArrayOrSlice> Iterator for ArrayIntoIter<VA> {
-    type Item = VA::Element;
-
-    fn next(&mut self) -> Option<Self::Item> {
-        Some(self.array[self.indexes.next()?].clone())
-    }
-
-    fn size_hint(&self) -> (usize, Option<usize>) {
-        self.indexes.size_hint()
-    }
-}
-
-impl<VA: ValueArrayOrSlice> std::iter::FusedIterator for ArrayIntoIter<VA> {}
-
-impl<VA: ValueArrayOrSlice> ExactSizeIterator for ArrayIntoIter<VA> {}
-
-impl<VA: ValueArrayOrSlice> DoubleEndedIterator for ArrayIntoIter<VA> {
-    fn next_back(&mut self) -> Option<Self::Item> {
-        Some(self.array[self.indexes.next_back()?].clone())
-    }
-}
-
-impl<VA: ValueArrayOrSlice> Array<VA> {
-    pub fn iter(&self) -> std::slice::Iter<'_, VA::Element> {
-        self.value.iter()
-    }
-}
-
-impl<'a, VA: ValueArrayOrSlice> IntoIterator for &'a Array<VA> {
-    type Item = &'a VA::Element;
-    type IntoIter = std::slice::Iter<'a, VA::Element>;
-
-    fn into_iter(self) -> Self::IntoIter {
-        self.value.iter()
-    }
-}
-
-impl<VA: ValueArrayOrSlice> IntoIterator for Array<VA> {
-    type Item = VA::Element;
-    type IntoIter = ArrayIntoIter<VA>;
-
-    fn into_iter(self) -> Self::IntoIter {
-        ArrayIntoIter {
-            indexes: 0..self.len(),
-            array: self.value,
-        }
-    }
-}
-
-#[derive(Clone, Debug)]
-pub struct ArrayExprIter<VA: ValueArrayOrSlice> {
-    array: Expr<Array<VA>>,
-    indexes: std::ops::Range<usize>,
-}
-
-impl<VA: ValueArrayOrSlice> Iterator for ArrayExprIter<VA> {
-    type Item = Expr<VA::Element>;
-
-    fn next(&mut self) -> Option<Self::Item> {
-        Some(ExprIndex::expr_index(self.array, self.indexes.next()?))
-    }
-
-    fn size_hint(&self) -> (usize, Option<usize>) {
-        self.indexes.size_hint()
-    }
-}
-
-impl<VA: ValueArrayOrSlice> std::iter::FusedIterator for ArrayExprIter<VA> {}
-
-impl<VA: ValueArrayOrSlice> ExactSizeIterator for ArrayExprIter<VA> {}
-
-impl<VA: ValueArrayOrSlice> DoubleEndedIterator for ArrayExprIter<VA> {
-    fn next_back(&mut self) -> Option<Self::Item> {
-        Some(ExprIndex::expr_index(self.array, self.indexes.next_back()?))
-    }
-}
-
-impl<VA: ValueArrayOrSlice> IntoIterator for Expr<Array<VA>> {
-    type Item = Expr<VA::Element>;
-    type IntoIter = ArrayExprIter<VA>;
-
-    fn into_iter(self) -> Self::IntoIter {
-        self.iter()
-    }
-}
-
-impl<VA: ValueArrayOrSlice> IntoIterator for &'_ Expr<Array<VA>> {
-    type Item = Expr<VA::Element>;
-    type IntoIter = ArrayExprIter<VA>;
-
-    fn into_iter(self) -> Self::IntoIter {
-        self.iter()
-    }
-}
-
-impl<VA: ValueArrayOrSlice> Expr<Array<VA>> {
-    pub fn len(self) -> usize {
-        self.canonical_type().len()
-    }
-    pub fn is_empty(self) -> bool {
-        self.canonical_type().is_empty()
-    }
-    pub fn iter(self) -> ArrayExprIter<VA> {
-        ArrayExprIter {
-            indexes: 0..self.len(),
-            array: self,
-        }
+    type Output = Array<T, LEN>;
+
+    fn index(&self, len: ConstUsize<LEN>) -> &Self::Output {
+        Interned::<_>::into_inner(Intern::intern_sized(Array::new(self.element, len)))
     }
 }

crates/fayalite/src/cli.rs

@@ -1,5 +1,5 @@
 use crate::{
-    bundle::{BundleType, BundleValue, DynBundle},
+    bundle::{Bundle, BundleType},
     firrtl,
     intern::Interned,
     module::Module,
@@ -82,7 +82,7 @@ impl FirrtlOutput {
 }
 
 impl FirrtlArgs {
-    fn run_impl(&self, top_module: Module<DynBundle>) -> Result<FirrtlOutput> {
+    fn run_impl(&self, top_module: Module<Bundle>) -> Result<FirrtlOutput> {
         let firrtl::FileBackend {
             top_fir_file_stem, ..
         } = firrtl::export(self.base.to_firrtl_file_backend(), &top_module)?;
@@ -94,20 +94,14 @@ impl FirrtlArgs {
     }
 }
 
-impl<T: BundleValue> RunPhase<Module<T>> for FirrtlArgs
-where
-    T::Type: BundleType<Value = T>,
-{
+impl<T: BundleType> RunPhase<Module<T>> for FirrtlArgs {
     type Output = FirrtlOutput;
     fn run(&self, top_module: Module<T>) -> Result<Self::Output> {
         self.run_impl(top_module.canonical())
     }
 }
 
-impl<T: BundleValue> RunPhase<Interned<Module<T>>> for FirrtlArgs
-where
-    T::Type: BundleType<Value = T>,
-{
+impl<T: BundleType> RunPhase<Interned<Module<T>>> for FirrtlArgs {
     type Output = FirrtlOutput;
     fn run(&self, top_module: Interned<Module<T>>) -> Result<Self::Output> {
         self.run(*top_module)
@@ -228,7 +222,7 @@ enum CliCommand {
 /// Use like:
 ///
 /// ```no_run
-/// # use fayalite::hdl_module;
+/// # use fayalite::prelude::*;
 /// # #[hdl_module]
 /// # fn my_module() {}
 /// use fayalite::cli;
@@ -241,7 +235,7 @@ enum CliCommand {
 /// You can also use it with a larger [`clap`]-based CLI like so:
 ///
 /// ```no_run
-/// # use fayalite::hdl_module;
+/// # use fayalite::prelude::*;
 /// # #[hdl_module]
 /// # fn my_module() {}
 /// use clap::{Subcommand, Parser};

crates/fayalite/src/clock.rs

@@ -2,111 +2,61 @@
 // See Notices.txt for copyright information
 use crate::{
     expr::{Expr, ToExpr},
-    int::{UInt, UIntType},
-    intern::Interned,
+    hdl,
+    int::Bool,
     reset::Reset,
     source_location::SourceLocation,
-    ty::{
-        impl_match_values_as_self, CanonicalType, CanonicalTypeKind, CanonicalValue, Connect,
-        DynCanonicalType, StaticType, Type, TypeEnum, Value, ValueEnum,
-    },
-    util::interned_bit,
+    ty::{impl_match_variant_as_self, CanonicalType, StaticType, Type, TypeProperties},
 };
-use bitvec::slice::BitSlice;
 
 #[derive(Copy, Clone, Eq, PartialEq, Hash, Debug, Default)]
-pub struct ClockType;
+pub struct Clock;
 
-impl ClockType {
-    pub const fn new() -> Self {
-        Self
-    }
-}
+impl Type for Clock {
+    type BaseType = Clock;
+    type MaskType = Bool;
 
-impl Type for ClockType {
-    type Value = Clock;
-    type CanonicalType = ClockType;
-    type CanonicalValue = Clock;
-    type MaskType = UIntType<1>;
-    type MaskValue = UInt<1>;
-
-    impl_match_values_as_self!();
+    impl_match_variant_as_self!();
 
     fn mask_type(&self) -> Self::MaskType {
-        UIntType::new()
+        Bool
     }
 
-    fn type_enum(&self) -> TypeEnum {
-        TypeEnum::Clock(*self)
+    fn canonical(&self) -> CanonicalType {
+        CanonicalType::Clock(*self)
     }
 
-    fn from_canonical_type(t: Self::CanonicalType) -> Self {
-        t
-    }
-
-    fn canonical(&self) -> Self::CanonicalType {
-        *self
-    }
-
-    fn source_location(&self) -> SourceLocation {
+    fn source_location() -> SourceLocation {
         SourceLocation::builtin()
     }
 
-    fn as_dyn_canonical_type_impl(this: &Self) -> Option<&dyn DynCanonicalType> {
-        Some(this)
+    fn from_canonical(canonical_type: CanonicalType) -> Self {
+        let CanonicalType::Clock(retval) = canonical_type else {
+            panic!("expected Clock");
+        };
+        retval
     }
 }
 
-impl Connect<Self> for ClockType {}
-
-impl CanonicalType for ClockType {
-    const CANONICAL_TYPE_KIND: CanonicalTypeKind = CanonicalTypeKind::Clock;
-}
-
-impl StaticType for ClockType {
-    fn static_type() -> Self {
-        Self
+impl Clock {
+    pub fn type_properties(self) -> TypeProperties {
+        Self::TYPE_PROPERTIES
+    }
+    pub fn can_connect(self, _rhs: Self) -> bool {
+        true
     }
 }
 
-#[derive(Copy, Clone, Eq, PartialEq, Hash, Debug)]
-pub struct Clock(pub bool);
-
-impl ToExpr for Clock {
-    type Type = ClockType;
-
-    fn ty(&self) -> Self::Type {
-        ClockType
-    }
-
-    fn to_expr(&self) -> Expr<Self> {
-        Expr::from_value(self)
-    }
-}
-
-impl Value for Clock {
-    fn to_canonical(&self) -> <Self::Type as Type>::CanonicalValue {
-        *self
-    }
-    fn to_bits_impl(this: &Self) -> Interned<BitSlice> {
-        interned_bit(this.0)
-    }
-}
-
-impl CanonicalValue for Clock {
-    fn value_enum_impl(this: &Self) -> ValueEnum {
-        ValueEnum::Clock(*this)
-    }
-    fn to_bits_impl(this: &Self) -> Interned<BitSlice> {
-        interned_bit(this.0)
-    }
-}
-
-#[derive(Copy, Clone, Debug, Eq, PartialEq, Hash, Value)]
-#[hdl(static, outline_generated)]
-pub struct ClockDomain {
-    pub clk: Clock,
-    pub rst: Reset,
+impl StaticType for Clock {
+    const TYPE: Self = Self;
+    const MASK_TYPE: Self::MaskType = Bool;
+    const TYPE_PROPERTIES: TypeProperties = TypeProperties {
+        is_passive: true,
+        is_storable: false,
+        is_castable_from_bits: true,
+        bit_width: 1,
+    };
+    const MASK_TYPE_PROPERTIES: TypeProperties = Bool::TYPE_PROPERTIES;
 }
 
 pub trait ToClock {
@@ -137,10 +87,10 @@ impl ToClock for Expr<Clock> {
     }
 }
 
-impl ToClock for Clock {
-    fn to_clock(&self) -> Expr<Clock> {
-        self.to_expr()
-    }
+#[hdl]
+pub struct ClockDomain {
+    pub clk: Clock,
+    pub rst: Reset,
 }
 
 impl ToClock for bool {
@@ -148,9 +98,3 @@ impl ToClock for bool {
         self.to_expr().to_clock()
     }
 }
-
-impl ToClock for UInt<1> {
-    fn to_clock(&self) -> Expr<Clock> {
-        self.to_expr().to_clock()
-    }
-}

crates/fayalite/src/enum_.rs

@@ -1,42 +1,39 @@
 // SPDX-License-Identifier: LGPL-3.0-or-later
 // See Notices.txt for copyright information
-#![allow(clippy::type_complexity)]
+
 use crate::{
-    bundle::{BundleValue, TypeHintTrait},
     expr::{ops::VariantAccess, Expr, ToExpr},
-    int::{UInt, UIntType},
-    intern::{Intern, Interned, MemoizeGeneric},
+    hdl,
+    int::Bool,
+    intern::{Intern, Interned},
     module::{
-        EnumMatchVariantAndInactiveScopeImpl, EnumMatchVariantsIterImpl, ModuleBuilder,
-        NormalModule, Scope,
+        enum_match_variants_helper, EnumMatchVariantAndInactiveScopeImpl,
+        EnumMatchVariantsIterImpl, Scope,
     },
     source_location::SourceLocation,
-    ty::{
-        CanonicalType, CanonicalTypeKind, CanonicalValue, Connect, DynCanonicalType,
-        DynCanonicalValue, DynType, MatchVariantAndInactiveScope, Type, TypeEnum, Value, ValueEnum,
-    },
+    ty::{CanonicalType, MatchVariantAndInactiveScope, StaticType, Type, TypeProperties},
 };
-use bitvec::{order::Lsb0, slice::BitSlice, vec::BitVec, view::BitView};
 use hashbrown::HashMap;
-use std::{
-    borrow::Cow,
-    fmt,
-    hash::{Hash, Hasher},
-    iter::FusedIterator,
-    marker::PhantomData,
-};
+use std::{fmt, iter::FusedIterator};
 
-#[derive(Copy, Clone, Debug, Hash, PartialEq, Eq)]
-pub struct VariantType<T> {
+#[derive(Copy, Clone, PartialEq, Eq, Hash, Debug)]
+pub struct EnumVariant {
     pub name: Interned<str>,
-    pub ty: Option<T>,
+    pub ty: Option<CanonicalType>,
 }
 
-pub struct FmtDebugInEnum<'a, T>(&'a VariantType<T>);
+impl EnumVariant {
+    pub fn fmt_debug_in_enum(self) -> FmtDebugInEnum {
+        FmtDebugInEnum(self)
+    }
+}
 
-impl<T: fmt::Debug> fmt::Debug for FmtDebugInEnum<'_, T> {
+#[derive(Copy, Clone)]
+pub struct FmtDebugInEnum(EnumVariant);
+
+impl fmt::Debug for FmtDebugInEnum {
     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-        let VariantType { name, ref ty } = *self.0;
+        let EnumVariant { name, ty } = self.0;
         if let Some(ty) = ty {
             write!(f, "{name}({ty:?})")
         } else {
@@ -45,76 +42,22 @@ impl<T: fmt::Debug> fmt::Debug for FmtDebugInEnum<'_, T> {
     }
 }
 
-impl<T: fmt::Debug> fmt::Display for FmtDebugInEnum<'_, T> {
+impl fmt::Display for FmtDebugInEnum {
     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         fmt::Debug::fmt(self, f)
     }
 }
 
-impl<T> VariantType<T> {
-    pub fn map_opt_ty<U, F: FnOnce(Option<T>) -> Option<U>>(self, f: F) -> VariantType<U> {
-        let Self { name, ty } = self;
-        VariantType { name, ty: f(ty) }
-    }
-    pub fn map_ty<U, F: FnOnce(T) -> U>(self, f: F) -> VariantType<U> {
-        let Self { name, ty } = self;
-        VariantType {
-            name,
-            ty: ty.map(f),
-        }
-    }
-    pub fn as_ref_ty(&self) -> VariantType<&T> {
-        VariantType {
-            name: self.name,
-            ty: self.ty.as_ref(),
-        }
-    }
-    pub fn fmt_debug_in_enum(&self) -> FmtDebugInEnum<T> {
-        FmtDebugInEnum(self)
-    }
-}
-
-impl<T: Type> VariantType<T> {
-    pub fn canonical(&self) -> VariantType<T::CanonicalType> {
-        self.as_ref_ty().map_ty(T::canonical)
-    }
-    pub fn to_dyn(&self) -> VariantType<Interned<dyn DynType>> {
-        self.as_ref_ty().map_ty(T::to_dyn)
-    }
-    pub fn canonical_dyn(&self) -> VariantType<Interned<dyn DynCanonicalType>> {
-        self.as_ref_ty().map_ty(T::canonical_dyn)
-    }
-}
-
-impl VariantType<Interned<dyn DynCanonicalType>> {
-    pub fn from_canonical_type_helper_has_value<T: Type>(self, expected_name: &str) -> T {
-        assert_eq!(&*self.name, expected_name, "variant name doesn't match");
-        let Some(ty) = self.ty else {
-            panic!("variant {expected_name} has no value but a value is expected");
-        };
-        T::from_dyn_canonical_type(ty)
-    }
-    pub fn from_canonical_type_helper_no_value(self, expected_name: &str) {
-        assert_eq!(&*self.name, expected_name, "variant name doesn't match");
-        assert!(
-            self.ty.is_none(),
-            "variant {expected_name} has a value but is expected to have no value"
-        );
-    }
-}
-
 #[derive(Clone, Eq)]
-struct DynEnumTypeImpl {
-    variants: Interned<[VariantType<Interned<dyn DynCanonicalType>>]>,
+struct EnumImpl {
+    variants: Interned<[EnumVariant]>,
     name_indexes: HashMap<Interned<str>, usize>,
-    bit_width: usize,
-    is_storable: bool,
-    is_castable_from_bits: bool,
+    type_properties: TypeProperties,
 }
 
-impl fmt::Debug for DynEnumTypeImpl {
-    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-        write!(f, "DynEnumType ")?;
+impl std::fmt::Debug for EnumImpl {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        f.write_str("Enum ")?;
         f.debug_set()
             .entries(
                 self.variants
@@ -125,66 +68,123 @@ impl fmt::Debug for DynEnumTypeImpl {
     }
 }
 
-impl PartialEq for DynEnumTypeImpl {
+impl std::hash::Hash for EnumImpl {
+    fn hash<H: std::hash::Hasher>(&self, state: &mut H) {
+        self.variants.hash(state);
+    }
+}
+
+impl PartialEq for EnumImpl {
     fn eq(&self, other: &Self) -> bool {
         self.variants == other.variants
     }
 }
 
-impl Hash for DynEnumTypeImpl {
-    fn hash<H: Hasher>(&self, state: &mut H) {
-        self.variants.hash(state);
-    }
-}
+#[derive(Copy, Clone, PartialEq, Eq, Hash)]
+pub struct Enum(Interned<EnumImpl>);
 
-#[derive(Copy, Clone, Hash, PartialEq, Eq)]
-pub struct DynEnumType(Interned<DynEnumTypeImpl>);
-
-impl fmt::Debug for DynEnumType {
+impl fmt::Debug for Enum {
     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         self.0.fmt(f)
     }
 }
 
-fn discriminant_bit_width_impl(variant_count: usize) -> usize {
-    variant_count
-        .next_power_of_two()
-        .checked_ilog2()
-        .unwrap_or(0) as usize
+const fn discriminant_bit_width_impl(variant_count: usize) -> usize {
+    match variant_count.next_power_of_two().checked_ilog2() {
+        Some(x) => x as usize,
+        None => 0,
+    }
 }
 
-impl DynEnumType {
-    #[track_caller]
-    pub fn new(variants: Interned<[VariantType<Interned<dyn DynCanonicalType>>]>) -> Self {
-        assert!(!variants.is_empty(), "zero-variant enums aren't yet supported: https://github.com/chipsalliance/firrtl-spec/issues/208");
-        let mut name_indexes = HashMap::with_capacity(variants.len());
-        let mut body_bit_width = 0usize;
-        let mut is_storable = true;
-        let mut is_castable_from_bits = true;
-        for (index, &VariantType { name, ty }) in variants.iter().enumerate() {
-            if let Some(old_index) = name_indexes.insert(name, index) {
-                panic!("duplicate variant name {name:?}: at both index {old_index} and {index}");
-            }
-            if let Some(ty) = ty {
-                assert!(
-                    ty.is_passive(),
-                    "variant type must be a passive type: {ty:?}"
-                );
-                body_bit_width = body_bit_width.max(ty.bit_width());
-                is_storable &= ty.is_storable();
-                is_castable_from_bits &= ty.is_castable_from_bits();
+#[derive(Clone)]
+pub struct EnumTypePropertiesBuilder {
+    type_properties: TypeProperties,
+    variant_count: usize,
+}
+
+impl EnumTypePropertiesBuilder {
+    #[must_use]
+    pub const fn new() -> Self {
+        Self {
+            type_properties: TypeProperties {
+                is_passive: true,
+                is_storable: true,
+                is_castable_from_bits: true,
+                bit_width: 0,
+            },
+            variant_count: 0,
         }
     }
-        let bit_width = body_bit_width
-            .checked_add(discriminant_bit_width_impl(variants.len()))
-            .unwrap_or_else(|| panic!("enum is too big: bit-width overflowed"));
-        Self(
-            DynEnumTypeImpl {
-                variants,
-                name_indexes,
-                bit_width,
+    pub const fn clone(&self) -> Self {
+        Self { ..*self }
+    }
+    #[must_use]
+    pub const fn variant(self, field_props: Option<TypeProperties>) -> Self {
+        let Self {
+            mut type_properties,
+            variant_count,
+        } = self;
+        if let Some(TypeProperties {
+            is_passive,
             is_storable,
             is_castable_from_bits,
+            bit_width,
+        }) = field_props
+        {
+            assert!(is_passive, "variant type must be a passive type");
+            type_properties = TypeProperties {
+                is_passive: true,
+                is_storable: type_properties.is_storable & is_storable,
+                is_castable_from_bits: type_properties.is_castable_from_bits
+                    & is_castable_from_bits,
+                bit_width: if type_properties.bit_width < bit_width {
+                    bit_width
+                } else {
+                    type_properties.bit_width
+                },
+            };
+        }
+        Self {
+            type_properties,
+            variant_count: variant_count + 1,
+        }
+    }
+    pub const fn finish(self) -> TypeProperties {
+        assert!(
+            self.variant_count != 0,
+            "zero-variant enums aren't yet supported: \
+            https://github.com/chipsalliance/firrtl-spec/issues/208",
+        );
+        let Some(bit_width) = self
+            .type_properties
+            .bit_width
+            .checked_add(discriminant_bit_width_impl(self.variant_count))
+        else {
+            panic!("enum is too big: bit-width overflowed");
+        };
+        TypeProperties {
+            bit_width,
+            ..self.type_properties
+        }
+    }
+}
+
+impl Enum {
+    #[track_caller]
+    pub fn new(variants: Interned<[EnumVariant]>) -> Self {
+        let mut name_indexes = HashMap::with_capacity(variants.len());
+        let mut type_props_builder = EnumTypePropertiesBuilder::new();
+        for (index, EnumVariant { name, ty }) in variants.iter().enumerate() {
+            if let Some(old_index) = name_indexes.insert(*name, index) {
+                panic!("duplicate variant name {name:?}: at both index {old_index} and {index}");
+            }
+            type_props_builder = type_props_builder.variant(ty.map(CanonicalType::type_properties));
+        }
+        Self(
+            EnumImpl {
+                variants,
+                name_indexes,
+                type_properties: type_props_builder.finish(),
             }
             .intern_sized(),
         )
@@ -192,233 +192,62 @@ impl DynEnumType {
     pub fn discriminant_bit_width(self) -> usize {
         discriminant_bit_width_impl(self.variants().len())
     }
-    pub fn is_passive(self) -> bool {
-        true
-    }
-    pub fn is_storable(self) -> bool {
-        self.0.is_storable
-    }
-    pub fn is_castable_from_bits(self) -> bool {
-        self.0.is_castable_from_bits
-    }
-    pub fn bit_width(self) -> usize {
-        self.0.bit_width
+    pub fn type_properties(self) -> TypeProperties {
+        self.0.type_properties
     }
     pub fn name_indexes(&self) -> &HashMap<Interned<str>, usize> {
         &self.0.name_indexes
     }
-}
-
-#[derive(Debug, Clone, Hash, PartialEq, Eq)]
-pub struct DynEnum {
-    ty: DynEnumType,
-    variant_index: usize,
-    variant_value: Option<DynCanonicalValue>,
-}
-
-impl DynEnum {
-    #[track_caller]
-    pub fn new_by_index(
-        ty: DynEnumType,
-        variant_index: usize,
-        variant_value: Option<DynCanonicalValue>,
-    ) -> Self {
-        let variant = ty.variants()[variant_index];
-        assert_eq!(
-            variant_value.as_ref().map(|v| v.ty()),
-            variant.ty,
-            "variant value doesn't match type"
-        );
-        Self {
-            ty,
-            variant_index,
-            variant_value,
+    pub fn can_connect(self, rhs: Self) -> bool {
+        if self.0.variants.len() != rhs.0.variants.len() {
+            return false;
+        }
+        for (
+            &EnumVariant {
+                name: lhs_name,
+                ty: lhs_ty,
+            },
+            &EnumVariant {
+                name: rhs_name,
+                ty: rhs_ty,
+            },
+        ) in self.0.variants.iter().zip(rhs.0.variants.iter())
+        {
+            if lhs_name != rhs_name {
+                return false;
+            }
+            match (lhs_ty, rhs_ty) {
+                (None, None) => {}
+                (None, Some(_)) | (Some(_), None) => return false,
+                (Some(lhs_ty), Some(rhs_ty)) => {
+                    if !lhs_ty.can_connect(rhs_ty) {
+                        return false;
                     }
                 }
-    #[track_caller]
-    pub fn new_by_name(
-        ty: DynEnumType,
-        variant_name: Interned<str>,
-        variant_value: Option<DynCanonicalValue>,
-    ) -> Self {
-        let variant_index = ty.name_indexes()[&variant_name];
-        Self::new_by_index(ty, variant_index, variant_value)
-    }
-    pub fn variant_index(&self) -> usize {
-        self.variant_index
-    }
-    pub fn variant_value(&self) -> &Option<DynCanonicalValue> {
-        &self.variant_value
-    }
-    pub fn variant_with_type(&self) -> VariantType<Interned<dyn DynCanonicalType>> {
-        self.ty.variants()[self.variant_index]
-    }
-    pub fn variant_name(&self) -> Interned<str> {
-        self.variant_with_type().name
-    }
-    pub fn variant_type(&self) -> Option<Interned<dyn DynCanonicalType>> {
-        self.variant_with_type().ty
-    }
-    pub fn variant_with_value(&self) -> VariantType<&DynCanonicalValue> {
-        self.variant_with_type()
-            .map_opt_ty(|_| self.variant_value.as_ref())
-    }
-}
-
-#[derive(Copy, Clone, Eq, PartialEq, Hash, Debug)]
-pub struct VariantsHint {
-    pub known_variants: Interned<[VariantType<Interned<dyn TypeHintTrait>>]>,
-    pub more_variants: bool,
-}
-
-impl VariantsHint {
-    pub fn new(
-        known_variants: impl IntoIterator<Item = VariantType<Interned<dyn TypeHintTrait>>>,
-        more_variants: bool,
-    ) -> Self {
-        let known_variants = Intern::intern_owned(Vec::from_iter(known_variants));
-        Self {
-            known_variants,
-            more_variants,
-        }
-    }
-    pub fn check_variant(
-        self,
-        index: usize,
-        variant: VariantType<&dyn DynType>,
-    ) -> Result<(), String> {
-        let Some(&known_variant) = self.known_variants.get(index) else {
-            return if self.more_variants {
-                Ok(())
-            } else {
-                Err(format!(
-                    "too many variants: name={:?} index={index}",
-                    variant.name
-                ))
-            };
-        };
-        let VariantType {
-            name: known_name,
-            ty: type_hint,
-        } = known_variant;
-        let VariantType { name, ty } = variant;
-        if name != known_name {
-            Err(format!(
-                "wrong variant name {name:?}, expected {known_name:?}"
-            ))
-        } else {
-            match (ty, type_hint) {
-                (Some(ty), Some(type_hint)) => type_hint.matches(ty),
-                (None, None) => Ok(()),
-                (None, Some(_)) => Err(format!(
-                    "expected variant {name:?} to have type, no type provided"
-                )),
-                (Some(_), None) => Err(format!(
-                    "expected variant {name:?} to have no type, but a type was provided"
-                )),
             }
         }
+        true
     }
 }
 
 pub trait EnumType:
     Type<
-        CanonicalType = DynEnumType,
-        CanonicalValue = DynEnum,
-        MaskType = UIntType<1>,
-        MaskValue = UInt<1>,
+    BaseType = Enum,
+    MaskType = Bool,
     MatchActiveScope = Scope,
     MatchVariantAndInactiveScope = EnumMatchVariantAndInactiveScope<Self>,
     MatchVariantsIter = EnumMatchVariantsIter<Self>,
-    > + Connect<Self>
-where
-    Self::Value: EnumValue + ToExpr<Type = Self>,
+>
 {
-    type Builder;
+    fn variants(&self) -> Interned<[EnumVariant]>;
     fn match_activate_scope(
         v: Self::MatchVariantAndInactiveScope,
     ) -> (Self::MatchVariant, Self::MatchActiveScope);
-    fn builder() -> Self::Builder;
-    fn variants(&self) -> Interned<[VariantType<Interned<dyn DynCanonicalType>>]>;
-    fn variants_hint() -> VariantsHint;
-    #[allow(clippy::result_unit_err)]
-    fn variant_to_bits<VariantValue: ToExpr + Eq + Hash + Send + Sync + 'static + Clone>(
-        &self,
-        variant_index: usize,
-        variant_value: Option<&VariantValue>,
-    ) -> Result<Interned<BitSlice>, ()> {
-        #[derive(Hash, Eq, PartialEq)]
-        struct VariantToBitsMemoize<E, V>(PhantomData<(E, V)>);
-        impl<E, V> Clone for VariantToBitsMemoize<E, V> {
-            fn clone(&self) -> Self {
-                *self
-            }
-        }
-        impl<E, V> Copy for VariantToBitsMemoize<E, V> {}
-        impl<
-                E: EnumType<Value: EnumValue<Type = E>>,
-                V: ToExpr + Eq + Hash + Send + Sync + 'static + Clone,
-            > MemoizeGeneric for VariantToBitsMemoize<E, V>
-        {
-            type InputRef<'a> = (&'a E, usize, Option<&'a V>);
-            type InputOwned = (E, usize, Option<V>);
-            type InputCow<'a> = (Cow<'a, E>, usize, Option<Cow<'a, V>>);
-            type Output = Result<Interned<BitSlice>, ()>;
-
-            fn input_borrow(input: &Self::InputOwned) -> Self::InputRef<'_> {
-                (&input.0, input.1, input.2.as_ref())
-            }
-            fn input_eq(a: Self::InputRef<'_>, b: Self::InputRef<'_>) -> bool {
-                a == b
-            }
-            fn input_cow_into_owned(input: Self::InputCow<'_>) -> Self::InputOwned {
-                (input.0.into_owned(), input.1, input.2.map(Cow::into_owned))
-            }
-            fn input_cow_borrow<'a>(input: &'a Self::InputCow<'_>) -> Self::InputRef<'a> {
-                (&input.0, input.1, input.2.as_deref())
-            }
-            fn input_cow_from_owned<'a>(input: Self::InputOwned) -> Self::InputCow<'a> {
-                (Cow::Owned(input.0), input.1, input.2.map(Cow::Owned))
-            }
-            fn input_cow_from_ref(input: Self::InputRef<'_>) -> Self::InputCow<'_> {
-                (Cow::Borrowed(input.0), input.1, input.2.map(Cow::Borrowed))
-            }
-            fn inner(self, input: Self::InputRef<'_>) -> Self::Output {
-                let (ty, variant_index, variant_value) = input;
-                let ty = ty.canonical();
-                let mut bits = BitVec::with_capacity(ty.bit_width());
-                bits.extend_from_bitslice(
-                    &variant_index.view_bits::<Lsb0>()[..ty.discriminant_bit_width()],
-                );
-                if let Some(variant_value) = variant_value {
-                    bits.extend_from_bitslice(&variant_value.to_expr().to_literal_bits()?);
-                }
-                bits.resize(ty.bit_width(), false);
-                Ok(Intern::intern_owned(bits))
-            }
-        }
-        VariantToBitsMemoize::<Self, VariantValue>(PhantomData).get((
-            self,
-            variant_index,
-            variant_value,
-        ))
-    }
 }
 
-pub trait EnumValue: Value
-where
-    <Self as ToExpr>::Type: EnumType<Value = Self>,
-{
-}
+pub struct EnumMatchVariantAndInactiveScope<T: EnumType>(EnumMatchVariantAndInactiveScopeImpl<T>);
 
-pub struct EnumMatchVariantAndInactiveScope<T: EnumType>(EnumMatchVariantAndInactiveScopeImpl<T>)
-where
-    T::Value: EnumValue<Type = T>;
-
-impl<T: EnumType> MatchVariantAndInactiveScope for EnumMatchVariantAndInactiveScope<T>
-where
-    T::Value: EnumValue<Type = T>,
-{
+impl<T: EnumType> MatchVariantAndInactiveScope for EnumMatchVariantAndInactiveScope<T> {
     type MatchVariant = T::MatchVariant;
     type MatchActiveScope = Scope;
 
@@ -427,36 +256,22 @@ where
     }
 }
 
-impl<T: EnumType> EnumMatchVariantAndInactiveScope<T>
-where
-    T::Value: EnumValue<Type = T>,
-{
-    pub fn variant_access(&self) -> Interned<VariantAccess<T, Interned<dyn DynCanonicalType>>> {
+impl<T: EnumType> EnumMatchVariantAndInactiveScope<T> {
+    pub fn variant_access(&self) -> VariantAccess {
         self.0.variant_access()
     }
-    pub fn activate(
-        self,
-    ) -> (
-        Interned<VariantAccess<T, Interned<dyn DynCanonicalType>>>,
-        Scope,
-    ) {
+    pub fn activate(self) -> (VariantAccess, Scope) {
         self.0.activate()
     }
 }
 
 #[derive(Clone)]
-pub struct EnumMatchVariantsIter<T: EnumType>
-where
-    T::Value: EnumValue<Type = T>,
-{
+pub struct EnumMatchVariantsIter<T: EnumType> {
     pub(crate) inner: EnumMatchVariantsIterImpl<T>,
     pub(crate) variant_index: std::ops::Range<usize>,
 }
 
-impl<T: EnumType> Iterator for EnumMatchVariantsIter<T>
-where
-    T::Value: EnumValue<Type = T>,
-{
+impl<T: EnumType> Iterator for EnumMatchVariantsIter<T> {
     type Item = EnumMatchVariantAndInactiveScope<T>;
 
     fn next(&mut self) -> Option<Self::Item> {
@@ -470,21 +285,15 @@ where
     }
 }
 
-impl<T: EnumType> ExactSizeIterator for EnumMatchVariantsIter<T>
-where
-    T::Value: EnumValue<Type = T>,
-{
+impl<T: EnumType> ExactSizeIterator for EnumMatchVariantsIter<T> {
     fn len(&self) -> usize {
         self.variant_index.len()
     }
 }
 
-impl<T: EnumType> FusedIterator for EnumMatchVariantsIter<T> where T::Value: EnumValue<Type = T> {}
+impl<T: EnumType> FusedIterator for EnumMatchVariantsIter<T> {}
 
-impl<T: EnumType> DoubleEndedIterator for EnumMatchVariantsIter<T>
-where
-    T::Value: EnumValue<Type = T>,
-{
+impl<T: EnumType> DoubleEndedIterator for EnumMatchVariantsIter<T> {
     fn next_back(&mut self) -> Option<Self::Item> {
         self.variant_index.next_back().map(|variant_index| {
             EnumMatchVariantAndInactiveScope(self.inner.for_variant_index(variant_index))
@@ -492,129 +301,66 @@ where
     }
 }
 
-impl Type for DynEnumType {
-    type CanonicalType = DynEnumType;
-    type Value = DynEnum;
-    type CanonicalValue = DynEnum;
-    type MaskType = UIntType<1>;
-    type MaskValue = UInt<1>;
-    type MatchVariant = Option<Expr<DynCanonicalValue>>;
-    type MatchActiveScope = Scope;
-    type MatchVariantAndInactiveScope = EnumMatchVariantAndInactiveScope<Self>;
-    type MatchVariantsIter = EnumMatchVariantsIter<Self>;
-
-    fn match_variants<IO: BundleValue>(
-        this: Expr<Self::Value>,
-        module_builder: &mut ModuleBuilder<IO, NormalModule>,
-        source_location: SourceLocation,
-    ) -> Self::MatchVariantsIter
-    where
-        IO::Type: crate::bundle::BundleType<Value = IO>,
-    {
-        module_builder.enum_match_variants_helper(this, source_location)
-    }
-
-    fn mask_type(&self) -> Self::MaskType {
-        UIntType::new()
-    }
-
-    fn canonical(&self) -> Self::CanonicalType {
-        *self
-    }
-
-    fn source_location(&self) -> SourceLocation {
-        SourceLocation::builtin()
-    }
-
-    fn type_enum(&self) -> TypeEnum {
-        TypeEnum::EnumType(*self)
-    }
-
-    fn from_canonical_type(t: Self::CanonicalType) -> Self {
-        t
-    }
-
-    fn as_dyn_canonical_type_impl(this: &Self) -> Option<&dyn DynCanonicalType> {
-        Some(this)
-    }
-}
-
-impl Connect<Self> for DynEnumType {}
-
-pub struct NoBuilder;
-
-impl EnumType for DynEnumType {
-    type Builder = NoBuilder;
-
+impl EnumType for Enum {
     fn match_activate_scope(
         v: Self::MatchVariantAndInactiveScope,
     ) -> (Self::MatchVariant, Self::MatchActiveScope) {
         let (expr, scope) = v.0.activate();
-        (expr.variant_type().ty.map(|_| expr.to_expr()), scope)
+        (expr.variant_type().map(|_| expr.to_expr()), scope)
     }
-
-    fn builder() -> Self::Builder {
-        NoBuilder
-    }
-
-    fn variants(&self) -> Interned<[VariantType<Interned<dyn DynCanonicalType>>]> {
+    fn variants(&self) -> Interned<[EnumVariant]> {
         self.0.variants
     }
+}
 
-    fn variants_hint() -> VariantsHint {
-        VariantsHint {
-            known_variants: [][..].intern(),
-            more_variants: true,
+impl Type for Enum {
+    type BaseType = Enum;
+    type MaskType = Bool;
+    type MatchVariant = Option<Expr<CanonicalType>>;
+    type MatchActiveScope = Scope;
+    type MatchVariantAndInactiveScope = EnumMatchVariantAndInactiveScope<Self>;
+    type MatchVariantsIter = EnumMatchVariantsIter<Self>;
+
+    fn match_variants(
+        this: Expr<Self>,
+        source_location: SourceLocation,
+    ) -> Self::MatchVariantsIter {
+        enum_match_variants_helper(this, source_location)
     }
+
+    fn mask_type(&self) -> Self::MaskType {
+        Bool
+    }
+
+    fn canonical(&self) -> CanonicalType {
+        CanonicalType::Enum(*self)
+    }
+
+    #[track_caller]
+    fn from_canonical(canonical_type: CanonicalType) -> Self {
+        let CanonicalType::Enum(retval) = canonical_type else {
+            panic!("expected enum");
+        };
+        retval
+    }
+    fn source_location() -> SourceLocation {
+        SourceLocation::builtin()
     }
 }
 
-impl CanonicalType for DynEnumType {
-    const CANONICAL_TYPE_KIND: CanonicalTypeKind = CanonicalTypeKind::EnumType;
+#[hdl]
+pub enum HdlOption<T: Type> {
+    HdlNone,
+    HdlSome(T),
 }
 
-impl ToExpr for DynEnum {
-    type Type = DynEnumType;
-
-    fn ty(&self) -> Self::Type {
-        self.ty
-    }
-
-    fn to_expr(&self) -> Expr<<Self::Type as Type>::Value> {
-        Expr::from_value(self)
-    }
+#[allow(non_snake_case)]
+pub fn HdlNone<T: StaticType>() -> Expr<HdlOption<T>> {
+    HdlOption[T::TYPE].HdlNone()
 }
 
-impl Value for DynEnum {
-    fn to_canonical(&self) -> <Self::Type as Type>::CanonicalValue {
-        self.clone()
-    }
-    fn to_bits_impl(this: &Self) -> Interned<BitSlice> {
-        this.ty
-            .variant_to_bits(this.variant_index, this.variant_value.as_ref())
-            .unwrap()
-    }
-}
-
-impl EnumValue for DynEnum {}
-
-impl CanonicalValue for DynEnum {
-    fn value_enum_impl(this: &Self) -> ValueEnum {
-        ValueEnum::Enum(this.clone())
-    }
-    fn to_bits_impl(this: &Self) -> Interned<BitSlice> {
-        this.ty
-            .variant_to_bits(this.variant_index, this.variant_value.as_ref())
-            .unwrap()
-    }
-}
-
-mod impl_option {
-    #[allow(dead_code)]
-    #[derive(crate::ty::Value)]
-    #[hdl(target(std::option::Option), connect_inexact, outline_generated)]
-    pub enum Option<T> {
-        None,
-        Some(T),
-    }
+#[allow(non_snake_case)]
+pub fn HdlSome<T: Type>(value: impl ToExpr<Type = T>) -> Expr<HdlOption<T>> {
+    let value = value.to_expr();
+    HdlOption[Expr::ty(value)].HdlSome(value)
 }

crates/fayalite/src/expr/target.rs

@@ -0,0 +1,432 @@
+use crate::{
+    array::Array,
+    bundle::{Bundle, BundleField},
+    expr::Flow,
+    intern::{Intern, Interned},
+    memory::{DynPortType, MemPort},
+    module::{Instance, ModuleIO, TargetName},
+    reg::Reg,
+    source_location::SourceLocation,
+    ty::{CanonicalType, Type},
+    wire::Wire,
+};
+use std::fmt;
+
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct TargetPathBundleField {
+    pub name: Interned<str>,
+}
+
+impl fmt::Display for TargetPathBundleField {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        write!(f, ".{}", self.name)
+    }
+}
+
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct TargetPathArrayElement {
+    pub index: usize,
+}
+
+impl fmt::Display for TargetPathArrayElement {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        write!(f, "[{}]", self.index)
+    }
+}
+
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct TargetPathDynArrayElement {}
+
+impl fmt::Display for TargetPathDynArrayElement {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        write!(f, "[<dyn>]")
+    }
+}
+
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub enum TargetPathElement {
+    BundleField(TargetPathBundleField),
+    ArrayElement(TargetPathArrayElement),
+    DynArrayElement(TargetPathDynArrayElement),
+}
+
+impl From<TargetPathBundleField> for TargetPathElement {
+    fn from(value: TargetPathBundleField) -> Self {
+        Self::BundleField(value)
+    }
+}
+
+impl From<TargetPathArrayElement> for TargetPathElement {
+    fn from(value: TargetPathArrayElement) -> Self {
+        Self::ArrayElement(value)
+    }
+}
+
+impl From<TargetPathDynArrayElement> for TargetPathElement {
+    fn from(value: TargetPathDynArrayElement) -> Self {
+        Self::DynArrayElement(value)
+    }
+}
+
+impl fmt::Display for TargetPathElement {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        match self {
+            Self::BundleField(v) => v.fmt(f),
+            Self::ArrayElement(v) => v.fmt(f),
+            Self::DynArrayElement(v) => v.fmt(f),
+        }
+    }
+}
+
+impl TargetPathElement {
+    pub fn canonical_ty(&self, parent: Interned<Target>) -> CanonicalType {
+        match self {
+            &Self::BundleField(TargetPathBundleField { name }) => {
+                let parent_ty = Bundle::from_canonical(parent.canonical_ty());
+                let field = parent_ty
+                    .field_by_name(name)
+                    .expect("field name is known to be a valid field of parent type");
+                field.ty
+            }
+            &Self::ArrayElement(TargetPathArrayElement { index }) => {
+                let parent_ty = Array::<CanonicalType>::from_canonical(parent.canonical_ty());
+                assert!(index < parent_ty.len());
+                parent_ty.element()
+            }
+            Self::DynArrayElement(_) => {
+                let parent_ty = Array::<CanonicalType>::from_canonical(parent.canonical_ty());
+                parent_ty.element()
+            }
+        }
+    }
+    pub fn flow(&self, parent: Interned<Target>) -> Flow {
+        match self {
+            Self::BundleField(v) => {
+                let parent_ty = Bundle::from_canonical(parent.canonical_ty());
+                let field = parent_ty
+                    .field_by_name(v.name)
+                    .expect("field name is known to be a valid field of parent type");
+                parent.flow().flip_if(field.flipped)
+            }
+            Self::ArrayElement(_) => parent.flow(),
+            Self::DynArrayElement(_) => parent.flow(),
+        }
+    }
+    pub fn is_static(&self) -> bool {
+        match self {
+            Self::BundleField(_) | Self::ArrayElement(_) => true,
+            Self::DynArrayElement(_) => false,
+        }
+    }
+}
+
+macro_rules! impl_target_base {
+    (
+        $(#[$enum_meta:meta])*
+        $enum_vis:vis enum $TargetBase:ident {
+            $(
+                #[is = $is_fn:ident]
+                #[to = $to_fn:ident]
+                $(#[$variant_meta:meta])*
+                $Variant:ident($VariantTy:ty),
+            )*
+        }
+    ) => {
+        $(#[$enum_meta])*
+        $enum_vis enum $TargetBase {
+            $(
+                $(#[$variant_meta])*
+                $Variant($VariantTy),
+            )*
+        }
+
+        impl fmt::Debug for $TargetBase {
+            fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+                match self {
+                    $(Self::$Variant(v) => v.fmt(f),)*
+                }
+            }
+        }
+
+        $(
+        impl From<$VariantTy> for $TargetBase {
+            fn from(value: $VariantTy) -> Self {
+                Self::$Variant(value)
+            }
+        }
+
+        impl From<$VariantTy> for Target {
+            fn from(value: $VariantTy) -> Self {
+                $TargetBase::$Variant(value).into()
+            }
+        }
+        )*
+
+        impl $TargetBase {
+            $(
+            $enum_vis fn $is_fn(&self) -> bool {
+                self.$to_fn().is_some()
+            }
+            $enum_vis fn $to_fn(&self) -> Option<&$VariantTy> {
+                if let Self::$Variant(retval) = self {
+                    Some(retval)
+                } else {
+                    None
+                }
+            }
+            )*
+            $enum_vis fn must_connect_to(&self) -> bool {
+                match self {
+                    $(Self::$Variant(v) => v.must_connect_to(),)*
+                }
+            }
+            $enum_vis fn flow(&self) -> Flow {
+                match self {
+                    $(Self::$Variant(v) => v.flow(),)*
+                }
+            }
+            $enum_vis fn source_location(&self) -> SourceLocation {
+                match self {
+                    $(Self::$Variant(v) => v.source_location(),)*
+                }
+            }
+        }
+    };
+}
+
+impl_target_base! {
+    #[derive(Clone, PartialEq, Eq, Hash)]
+    pub enum TargetBase {
+        #[is = is_module_io]
+        #[to = module_io]
+        ModuleIO(ModuleIO<CanonicalType>),
+        #[is = is_mem_port]
+        #[to = mem_port]
+        MemPort(MemPort<DynPortType>),
+        #[is = is_reg]
+        #[to = reg]
+        Reg(Reg<CanonicalType>),
+        #[is = is_wire]
+        #[to = wire]
+        Wire(Wire<CanonicalType>),
+        #[is = is_instance]
+        #[to = instance]
+        Instance(Instance<Bundle>),
+    }
+}
+
+impl fmt::Display for TargetBase {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        write!(f, "{:?}", self.target_name())
+    }
+}
+
+impl TargetBase {
+    pub fn target_name(&self) -> TargetName {
+        match self {
+            TargetBase::ModuleIO(v) => TargetName(v.scoped_name(), None),
+            TargetBase::MemPort(v) => TargetName(v.mem_name(), Some(v.port_name())),
+            TargetBase::Reg(v) => TargetName(v.scoped_name(), None),
+            TargetBase::Wire(v) => TargetName(v.scoped_name(), None),
+            TargetBase::Instance(v) => TargetName(v.scoped_name(), None),
+        }
+    }
+    pub fn canonical_ty(&self) -> CanonicalType {
+        match self {
+            TargetBase::ModuleIO(v) => v.ty(),
+            TargetBase::MemPort(v) => v.ty().canonical(),
+            TargetBase::Reg(v) => v.ty(),
+            TargetBase::Wire(v) => v.ty(),
+            TargetBase::Instance(v) => v.ty().canonical(),
+        }
+    }
+}
+
+#[derive(Copy, Clone, PartialEq, Eq, Hash)]
+pub struct TargetChild {
+    parent: Interned<Target>,
+    path_element: Interned<TargetPathElement>,
+    canonical_ty: CanonicalType,
+    flow: Flow,
+}
+
+impl fmt::Debug for TargetChild {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        let Self {
+            parent,
+            path_element,
+            canonical_ty: _,
+            flow: _,
+        } = self;
+        parent.fmt(f)?;
+        fmt::Display::fmt(path_element, f)
+    }
+}
+
+impl fmt::Display for TargetChild {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        let Self {
+            parent,
+            path_element,
+            canonical_ty: _,
+            flow: _,
+        } = self;
+        parent.fmt(f)?;
+        path_element.fmt(f)
+    }
+}
+
+impl TargetChild {
+    pub fn new(parent: Interned<Target>, path_element: Interned<TargetPathElement>) -> Self {
+        Self {
+            parent,
+            path_element,
+            canonical_ty: path_element.canonical_ty(parent),
+            flow: path_element.flow(parent),
+        }
+    }
+    pub fn parent(self) -> Interned<Target> {
+        self.parent
+    }
+    pub fn path_element(self) -> Interned<TargetPathElement> {
+        self.path_element
+    }
+    pub fn canonical_ty(self) -> CanonicalType {
+        self.canonical_ty
+    }
+    pub fn flow(self) -> Flow {
+        self.flow
+    }
+    pub fn bundle_field(self) -> Option<BundleField> {
+        if let TargetPathElement::BundleField(TargetPathBundleField { name }) = *self.path_element {
+            let parent_ty = Bundle::from_canonical(self.parent.canonical_ty());
+            Some(
+                parent_ty
+                    .field_by_name(name)
+                    .expect("field name known to be a valid field of parent"),
+            )
+        } else {
+            None
+        }
+    }
+}
+
+#[derive(Clone, PartialEq, Eq, Hash)]
+pub enum Target {
+    Base(Interned<TargetBase>),
+    Child(TargetChild),
+}
+
+impl From<TargetBase> for Target {
+    fn from(value: TargetBase) -> Self {
+        Self::Base(Intern::intern_sized(value))
+    }
+}
+
+impl From<TargetChild> for Target {
+    fn from(value: TargetChild) -> Self {
+        Self::Child(value)
+    }
+}
+
+impl From<Interned<TargetBase>> for Target {
+    fn from(value: Interned<TargetBase>) -> Self {
+        Self::Base(value)
+    }
+}
+
+impl Target {
+    pub fn base(&self) -> Interned<TargetBase> {
+        let mut target = self;
+        loop {
+            match target {
+                Self::Base(v) => break *v,
+                Self::Child(v) => target = &v.parent,
+            }
+        }
+    }
+    pub fn child(&self) -> Option<TargetChild> {
+        match *self {
+            Target::Base(_) => None,
+            Target::Child(v) => Some(v),
+        }
+    }
+    pub fn is_static(&self) -> bool {
+        let mut target = self;
+        loop {
+            match target {
+                Self::Base(_) => return true,
+                Self::Child(v) if !v.path_element().is_static() => return false,
+                Self::Child(v) => target = &v.parent,
+            }
+        }
+    }
+    #[must_use]
+    pub fn join(&self, path_element: Interned<TargetPathElement>) -> Self {
+        TargetChild::new(self.intern(), path_element).into()
+    }
+    pub fn flow(&self) -> Flow {
+        match self {
+            Self::Base(v) => v.flow(),
+            Self::Child(v) => v.flow(),
+        }
+    }
+    pub fn canonical_ty(&self) -> CanonicalType {
+        match self {
+            Target::Base(v) => v.canonical_ty(),
+            Target::Child(v) => v.canonical_ty(),
+        }
+    }
+}
+
+impl fmt::Display for Target {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        match self {
+            Self::Base(v) => v.fmt(f),
+            Self::Child(v) => v.fmt(f),
+        }
+    }
+}
+
+impl fmt::Debug for Target {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        match self {
+            Self::Base(v) => v.fmt(f),
+            Self::Child(v) => v.fmt(f),
+        }
+    }
+}
+
+pub trait GetTarget {
+    fn target(&self) -> Option<Interned<Target>>;
+}
+
+impl GetTarget for bool {
+    fn target(&self) -> Option<Interned<Target>> {
+        None
+    }
+}
+
+impl<T: ?Sized + GetTarget + Send + Sync + 'static> GetTarget for Interned<T> {
+    fn target(&self) -> Option<Interned<Target>> {
+        T::target(self)
+    }
+}
+
+impl<T: ?Sized + GetTarget> GetTarget for &'_ T {
+    fn target(&self) -> Option<Interned<Target>> {
+        T::target(self)
+    }
+}
+
+impl<T: ?Sized + GetTarget> GetTarget for &'_ mut T {
+    fn target(&self) -> Option<Interned<Target>> {
+        T::target(self)
+    }
+}
+
+impl<T: ?Sized + GetTarget> GetTarget for Box<T> {
+    fn target(&self) -> Option<Interned<Target>> {
+        T::target(self)
+    }
+}

crates/fayalite/src/intern.rs

@@ -22,6 +22,179 @@ use std::{
 
 pub mod type_map;
 
+pub trait LazyInternedTrait<T: ?Sized + Send + Sync + 'static>: Send + Sync + Any {
+    fn get(&self) -> Interned<T>;
+}
+
+impl<T: ?Sized + Send + Sync + 'static, F: ?Sized + Fn() -> Interned<T> + Send + Sync + Any>
+    LazyInternedTrait<T> for F
+{
+    fn get(&self) -> Interned<T> {
+        self()
+    }
+}
+
+#[repr(transparent)]
+pub struct LazyInternedFn<T: ?Sized + Send + Sync + 'static>(pub &'static dyn LazyInternedTrait<T>);
+
+impl<T: ?Sized + Send + Sync + 'static> Copy for LazyInternedFn<T> {}
+
+impl<T: ?Sized + Send + Sync + 'static> Clone for LazyInternedFn<T> {
+    fn clone(&self) -> Self {
+        *self
+    }
+}
+
+impl<T: ?Sized + Send + Sync + 'static> Hash for LazyInternedFn<T> {
+    fn hash<H: Hasher>(&self, state: &mut H) {
+        self.0.get_ptr_eq_with_type_id().hash(state);
+    }
+}
+
+impl<T: ?Sized + Send + Sync + 'static> Eq for LazyInternedFn<T> {}
+
+impl<T: ?Sized + Send + Sync + 'static> PartialEq for LazyInternedFn<T> {
+    fn eq(&self, other: &Self) -> bool {
+        self.0.get_ptr_eq_with_type_id() == other.0.get_ptr_eq_with_type_id()
+    }
+}
+
+pub enum LazyInterned<T: ?Sized + Send + Sync + 'static> {
+    Interned(Interned<T>),
+    Lazy(LazyInternedFn<T>),
+}
+
+impl<T: ?Sized + Send + Sync + 'static> LazyInterned<T> {
+    pub const fn new_lazy(v: &'static dyn LazyInternedTrait<T>) -> Self {
+        Self::Lazy(LazyInternedFn(v))
+    }
+}
+
+impl<T: ?Sized + Sync + Send + 'static> Clone for LazyInterned<T> {
+    fn clone(&self) -> Self {
+        *self
+    }
+}
+
+impl<T: ?Sized + Sync + Send + 'static> Copy for LazyInterned<T> {}
+
+impl<T: ?Sized + Sync + Send + 'static + Intern> Deref for LazyInterned<T> {
+    type Target = T;
+
+    fn deref(&self) -> &Self::Target {
+        Interned::into_inner(self.interned())
+    }
+}
+
+impl<T: ?Sized + Sync + Send + 'static + Intern> Eq for LazyInterned<T> where Interned<T>: Eq {}
+
+impl<T: ?Sized + Sync + Send + 'static + Intern> PartialEq for LazyInterned<T>
+where
+    Interned<T>: PartialEq,
+{
+    fn eq(&self, other: &Self) -> bool {
+        self.interned() == other.interned()
+    }
+}
+
+impl<T: ?Sized + Sync + Send + 'static + Intern> Ord for LazyInterned<T>
+where
+    Interned<T>: Ord,
+{
+    fn cmp(&self, other: &Self) -> Ordering {
+        self.interned().cmp(&other.interned())
+    }
+}
+
+impl<T: ?Sized + Sync + Send + 'static + Intern> PartialOrd for LazyInterned<T>
+where
+    Interned<T>: PartialOrd,
+{
+    fn partial_cmp(&self, other: &Self) -> Option<Ordering> {
+        self.interned().partial_cmp(&other.interned())
+    }
+}
+
+impl<T: ?Sized + Sync + Send + 'static + Intern> Hash for LazyInterned<T>
+where
+    Interned<T>: Hash,
+{
+    fn hash<H: Hasher>(&self, state: &mut H) {
+        self.interned().hash(state);
+    }
+}
+
+impl<T: ?Sized + Sync + Send + 'static> LazyInterned<T> {
+    pub fn interned(self) -> Interned<T>
+    where
+        T: Intern,
+    {
+        struct MemoizeInterned<T: ?Sized + Intern>(PhantomData<T>);
+
+        impl<T: ?Sized + Intern> Hash for MemoizeInterned<T> {
+            fn hash<H: Hasher>(&self, _state: &mut H) {}
+        }
+
+        impl<T: ?Sized + Intern> PartialEq for MemoizeInterned<T> {
+            fn eq(&self, _other: &Self) -> bool {
+                true
+            }
+        }
+
+        impl<T: ?Sized + Intern> Eq for MemoizeInterned<T> {}
+
+        impl<T: ?Sized + Intern> Clone for MemoizeInterned<T> {
+            fn clone(&self) -> Self {
+                *self
+            }
+        }
+
+        impl<T: ?Sized + Intern> Copy for MemoizeInterned<T> {}
+
+        impl<T: ?Sized + Intern> MemoizeGeneric for MemoizeInterned<T> {
+            type InputRef<'a> = LazyInternedFn<T>;
+
+            type InputOwned = LazyInternedFn<T>;
+
+            type InputCow<'a> = LazyInternedFn<T>;
+
+            type Output = Interned<T>;
+
+            fn input_eq(a: Self::InputRef<'_>, b: Self::InputRef<'_>) -> bool {
+                a == b
+            }
+
+            fn input_borrow(input: &Self::InputOwned) -> Self::InputRef<'_> {
+                *input
+            }
+
+            fn input_cow_into_owned(input: Self::InputCow<'_>) -> Self::InputOwned {
+                input
+            }
+
+            fn input_cow_borrow<'a>(input: &'a Self::InputCow<'_>) -> Self::InputRef<'a> {
+                *input
+            }
+
+            fn input_cow_from_owned<'a>(input: Self::InputOwned) -> Self::InputCow<'a> {
+                input
+            }
+
+            fn input_cow_from_ref(input: Self::InputRef<'_>) -> Self::InputCow<'_> {
+                input
+            }
+
+            fn inner(self, input: Self::InputRef<'_>) -> Self::Output {
+                input.0.get()
+            }
+        }
+        match self {
+            Self::Interned(retval) => retval,
+            Self::Lazy(retval) => MemoizeInterned(PhantomData).get(retval),
+        }
+    }
+}
+
 pub trait InternedCompare {
     type InternedCompareKey: Ord + Hash;
     fn interned_compare_key_ref(this: &Self) -> Self::InternedCompareKey;
@@ -471,6 +644,12 @@ pub struct Interned<T: ?Sized + 'static + Send + Sync, C: InternContext = Global
 
 macro_rules! forward_fmt_trait {
     ($Tr:ident) => {
+        impl<T: ?Sized + Intern + fmt::$Tr> fmt::$Tr for LazyInterned<T> {
+            fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+                T::fmt(&**self, f)
+            }
+        }
+
         impl<T: ?Sized + 'static + Send + Sync + fmt::$Tr, C: InternContext> fmt::$Tr
             for Interned<T, C>
         {

crates/fayalite/src/lib.rs

@@ -12,7 +12,6 @@ extern crate self as fayalite;
 pub use std as __std;
 
 #[doc(inline)]
-#[doc(alias = "hdl")]
 /// The `#[hdl_module]` attribute is applied to a Rust function so that that function creates
 /// a [`Module`][`::fayalite::module::Module`] when called.
 /// In the function body it will implicitly create a
@@ -21,9 +20,17 @@ pub use std as __std;
 /// See [Fayalite Modules][crate::_docs::modules]
 pub use fayalite_proc_macros::hdl_module;
 
+#[doc(inline)]
+pub use fayalite_proc_macros::hdl;
+
+/// struct used as a placeholder when applying defaults
+#[derive(Copy, Clone, Debug, PartialEq, Eq, PartialOrd, Ord, Hash, Default)]
+pub struct __;
+
 #[cfg(feature = "unstable-doc")]
 pub mod _docs;
 
+// FIXME: finish
 pub mod annotations;
 pub mod array;
 pub mod bundle;
@@ -41,5 +48,6 @@ pub mod reset;
 pub mod source_location;
 pub mod ty;
 pub mod util;
-pub mod valueless;
+//pub mod valueless;
+pub mod prelude;
 pub mod wire;

crates/fayalite/src/memory.rs

@@ -4,15 +4,16 @@
 #![allow(clippy::multiple_bound_locations)]
 use crate::{
     annotations::{Annotation, IntoAnnotations, TargetedAnnotation},
-    array::{Array, ArrayType, ArrayTypeTrait, ValueArrayOrSlice},
-    bundle::{BundleType, BundleValue, DynBundle, DynBundleType},
-    clock::{Clock, ClockType},
-    expr::{Expr, ExprEnum, ExprTrait, Flow, ToExpr},
-    int::{DynUInt, DynUIntType, UInt, UIntType},
+    array::{Array, ArrayType},
+    bundle::{Bundle, BundleType},
+    clock::Clock,
+    expr::{Expr, Flow, ToExpr, ToLiteralBits},
+    hdl,
+    int::{Bool, DynSize, Size, UInt, UIntType},
     intern::{Intern, Interned},
     module::ScopedNameId,
     source_location::SourceLocation,
-    ty::{AsMask, DynCanonicalType, DynCanonicalValue, DynType, Type, Value},
+    ty::{AsMask, CanonicalType, Type},
     util::DebugAsDisplay,
 };
 use bitvec::slice::BitSlice;
@@ -20,37 +21,37 @@ use std::{
     cell::RefCell,
     fmt,
     hash::{Hash, Hasher},
+    marker::PhantomData,
     num::NonZeroU32,
     rc::Rc,
 };
 
-#[derive(Value, Clone, PartialEq, Eq, Hash, Debug)]
-pub struct ReadStruct<Element> {
-    pub addr: DynUInt,
-    pub en: UInt<1>,
+#[hdl]
+pub struct ReadStruct<Element, AddrWidth: Size> {
+    pub addr: UIntType<AddrWidth>,
+    pub en: Bool,
     pub clk: Clock,
     #[hdl(flip)]
     pub data: Element,
 }
 
-#[derive(Value, Clone, PartialEq, Eq, Hash, Debug)]
-pub struct WriteStruct<Element: Value> {
-    pub addr: DynUInt,
-    pub en: UInt<1>,
+#[hdl]
+pub struct WriteStruct<Element, AddrWidth: Size> {
+    pub addr: UIntType<AddrWidth>,
+    pub en: Bool,
     pub clk: Clock,
     pub data: Element,
     pub mask: AsMask<Element>,
 }
 
-#[allow(clippy::multiple_bound_locations)]
-#[derive(Value, Clone, PartialEq, Eq, Hash, Debug)]
-pub struct ReadWriteStruct<Element: Value> {
-    pub addr: DynUInt,
-    pub en: UInt<1>,
+#[hdl]
+pub struct ReadWriteStruct<Element, AddrWidth: Size> {
+    pub addr: UIntType<AddrWidth>,
+    pub en: Bool,
     pub clk: Clock,
     #[hdl(flip)]
     pub rdata: Element,
-    pub wmode: UInt<1>,
+    pub wmode: Bool,
     pub wdata: Element,
     pub wmask: AsMask<Element>,
 }
@@ -63,11 +64,10 @@ pub trait PortType:
     sealed::Sealed + Clone + Eq + Hash + fmt::Debug + Send + Sync + 'static
 {
     type PortKindTy: Copy + Eq + Hash + fmt::Debug + Send + Sync + 'static;
-    type PortType: BundleType<Value = Self::PortValue>;
-    type PortValue: BundleValue<Type = Self::PortType>;
+    type Port: BundleType;
     fn port_kind(port_kind: Self::PortKindTy) -> PortKind;
     fn from_port_kind(port_kind: PortKind) -> Self::PortKindTy;
-    fn port_ty(port: &MemPort<Self>) -> Self::PortType;
+    fn port_ty(port: &MemPort<Self>) -> Self::Port;
 }
 
 #[derive(Copy, Clone, PartialEq, Eq, Hash, Debug)]
@@ -79,8 +79,7 @@ impl sealed::Sealed for DynPortType {}
 
 impl PortType for DynPortType {
     type PortKindTy = PortKind;
-    type PortType = DynBundleType;
-    type PortValue = DynBundle;
+    type Port = Bundle;
 
     fn port_kind(port_kind: Self::PortKindTy) -> PortKind {
         port_kind
@@ -90,41 +89,38 @@ impl PortType for DynPortType {
         port_kind
     }
 
-    fn port_ty(port: &MemPort<Self>) -> Self::PortType {
-        match port.port_kind {
-            PortKind::ReadOnly => MemPort::<ReadStruct<DynCanonicalValue>>::from_canonical(*port)
+    fn port_ty(port: &MemPort<Self>) -> Self::Port {
+        Bundle::new(match port.port_kind {
+            PortKind::ReadOnly => {
+                MemPort::<ReadStruct<CanonicalType, DynSize>>::from_canonical(*port)
                     .ty()
-                .canonical(),
-            PortKind::WriteOnly => MemPort::<WriteStruct<DynCanonicalValue>>::from_canonical(*port)
+                    .fields()
+            }
+            PortKind::WriteOnly => {
+                MemPort::<WriteStruct<CanonicalType, DynSize>>::from_canonical(*port)
                     .ty()
-                .canonical(),
+                    .fields()
+            }
             PortKind::ReadWrite => {
-                MemPort::<ReadWriteStruct<DynCanonicalValue>>::from_canonical(*port)
+                MemPort::<ReadWriteStruct<CanonicalType, DynSize>>::from_canonical(*port)
                     .ty()
-                    .canonical()
-            }
+                    .fields()
             }
+        })
     }
 }
 
-pub trait PortStruct:
-    BundleValue
-    + sealed::Sealed
-    + PortType<PortKindTy = (), PortType = <Self as ToExpr>::Type, PortValue = Self>
-where
-    Self::Type: BundleType<Value = Self>,
-{
-    type Element: Value<Type = Self::ElementType>;
-    type ElementType: Type<Value = Self::Element>;
+pub trait PortStruct: BundleType + sealed::Sealed + PortType<PortKindTy = (), Port = Self> {
+    type Element: Type;
     const PORT_KIND: PortKind;
 
-    fn addr(this: Expr<Self>) -> Expr<DynUInt>;
-    fn en(this: Expr<Self>) -> Expr<UInt<1>>;
+    fn addr(this: Expr<Self>) -> Expr<UInt>;
+    fn en(this: Expr<Self>) -> Expr<Bool>;
     fn clk(this: Expr<Self>) -> Expr<Clock>;
     fn rdata(this: Expr<Self>) -> Option<Expr<Self::Element>>;
     fn wdata(this: Expr<Self>) -> Option<Expr<Self::Element>>;
     fn wmask(this: Expr<Self>) -> Option<Expr<AsMask<Self::Element>>>;
-    fn wmode(this: Expr<Self>) -> Expr<UInt<1>>;
+    fn wmode(this: Expr<Self>) -> Expr<Bool>;
 }
 
 macro_rules! impl_port_struct {
@@ -137,19 +133,11 @@ macro_rules! impl_port_struct {
             $($body:tt)*
         }
     ) => {
-        impl<$Element: Value> sealed::Sealed for $Struct<$Element>
-        where
-            $Element::Type: Type<Value = $Element>,
-        {
-        }
+        impl<$Element: Type> sealed::Sealed for $Struct<$Element, DynSize> {}
 
-        impl<$Element: Value> PortType for $Struct<$Element>
-        where
-            $Element::Type: Type<Value = $Element>,
-        {
+        impl<$Element: Type> PortType for $Struct<$Element, DynSize> {
             type PortKindTy = ();
-            type PortType = <Self as ToExpr>::Type;
-            type PortValue = Self;
+            type Port = Self;
 
             fn port_kind(_port_kind: Self::PortKindTy) -> PortKind {
                 Self::PORT_KIND
@@ -164,18 +152,14 @@ macro_rules! impl_port_struct {
             }
         }
 
-        impl<$Element: Value> PortStruct for $Struct<$Element>
-        where
-            $Element::Type: Type<Value = $Element>,
-        {
+        impl<$Element: Type> PortStruct for $Struct<$Element, DynSize> {
             type Element = $Element;
-            type ElementType = $Element::Type;
 
-            fn addr(this: Expr<Self>) -> Expr<DynUInt> {
+            fn addr(this: Expr<Self>) -> Expr<UInt> {
                 this.addr
             }
 
-            fn en(this: Expr<Self>) -> Expr<UInt<1>> {
+            fn en(this: Expr<Self>) -> Expr<Bool> {
                 this.en
             }
 
@@ -190,14 +174,9 @@ macro_rules! impl_port_struct {
 
 impl_port_struct! {
     impl<Element> _ for ReadStruct {
-        fn port_ty(port: &MemPort<Self>) -> <MemPort<Self> as ToExpr>::Type {
-            type T<V> = <V as ToExpr>::Type;
-            T::<Self> {
-                addr: port.addr_type,
-                en: UIntType::new(),
-                clk: ClockType,
-                data: Element::Type::from_dyn_canonical_type(port.mem_element_type),
-            }
+        fn port_ty(port: &MemPort<Self>) -> Self {
+            let element = Element::from_canonical(port.mem_element_type);
+            ReadStruct[element][port.addr_type.width()]
         }
 
         const PORT_KIND: PortKind = PortKind::ReadOnly;
@@ -214,7 +193,7 @@ impl_port_struct! {
             None
         }
 
-        fn wmode(_this: Expr<Self>) -> Expr<UInt<1>> {
+        fn wmode(_this: Expr<Self>) -> Expr<Bool> {
             false.to_expr()
         }
     }
@@ -222,16 +201,9 @@ impl_port_struct! {
 
 impl_port_struct! {
     impl<Element> _ for WriteStruct {
-        fn port_ty(port: &MemPort<Self>) -> <MemPort<Self> as ToExpr>::Type {
-            type T<V> = <V as ToExpr>::Type;
-            let element_ty = Element::Type::from_dyn_canonical_type(port.mem_element_type);
-            T::<Self> {
-                addr: port.addr_type,
-                en: UIntType::new(),
-                clk: ClockType,
-                mask: element_ty.mask_type(),
-                data: element_ty,
-            }
+        fn port_ty(port: &MemPort<Self>) -> Self {
+            let element = Element::from_canonical(port.mem_element_type);
+            WriteStruct[element][port.addr_type.width()]
         }
 
         const PORT_KIND: PortKind = PortKind::WriteOnly;
@@ -248,7 +220,7 @@ impl_port_struct! {
             Some(this.mask)
         }
 
-        fn wmode(_this: Expr<Self>) -> Expr<UInt<1>> {
+        fn wmode(_this: Expr<Self>) -> Expr<Bool> {
             true.to_expr()
         }
     }
@@ -256,18 +228,9 @@ impl_port_struct! {
 
 impl_port_struct! {
     impl<Element> _ for ReadWriteStruct {
-        fn port_ty(port: &MemPort<Self>) -> <MemPort<Self> as ToExpr>::Type {
-            type T<V> = <V as ToExpr>::Type;
-            let element_ty = Element::Type::from_dyn_canonical_type(port.mem_element_type);
-            T::<Self> {
-                addr: port.addr_type,
-                en: UIntType::new(),
-                clk: ClockType,
-                rdata: element_ty.clone(),
-                wmode: UIntType::new(),
-                wmask: element_ty.mask_type(),
-                wdata: element_ty,
-            }
+        fn port_ty(port: &MemPort<Self>) -> Self {
+            let element = Element::from_canonical(port.mem_element_type);
+            ReadWriteStruct[element][port.addr_type.width()]
         }
 
         const PORT_KIND: PortKind = PortKind::ReadWrite;
@@ -284,7 +247,7 @@ impl_port_struct! {
             Some(this.wmask)
         }
 
-        fn wmode(this: Expr<Self>) -> Expr<UInt<1>> {
+        fn wmode(this: Expr<Self>) -> Expr<Bool> {
             this.wmode
         }
     }
@@ -382,42 +345,31 @@ pub struct MemPort<T: PortType> {
     source_location: SourceLocation,
     port_kind: T::PortKindTy,
     port_index: usize,
-    addr_type: DynUIntType,
-    mem_element_type: Interned<dyn DynCanonicalType>,
+    addr_type: UInt,
+    mem_element_type: CanonicalType,
 }
 
 impl<T: PortType> fmt::Debug for MemPort<T> {
     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-        let Self {
-            mem_name,
-            source_location: _,
-            port_kind: _,
-            port_index: _,
-            addr_type,
-            mem_element_type,
-        } = self;
-        f.debug_struct("MemPort")
-            .field("mem_name", mem_name)
-            .field("port_name", &self.port_name())
-            .field("addr_type", addr_type)
-            .field("mem_element_type", mem_element_type)
-            .finish_non_exhaustive()
+        f.write_str("MemPort(")?;
+        self.mem_name.fmt(f)?;
+        f.write_str(".")?;
+        self.port_name().fmt(f)?;
+        f.write_str(": ")?;
+        match self.port_kind() {
+            PortKind::ReadOnly => f.write_str("ReadStruct<")?,
+            PortKind::WriteOnly => f.write_str("WriteStruct<")?,
+            PortKind::ReadWrite => f.write_str("ReadWriteStruct<")?,
         }
-}
-
-impl<T: PortType> ToExpr for MemPort<T> {
-    type Type = T::PortType;
-
-    fn ty(&self) -> Self::Type {
-        T::port_ty(self)
-    }
-
-    fn to_expr(&self) -> Expr<<Self::Type as Type>::Value> {
-        Expr::new_unchecked(self.expr_enum())
+        self.mem_element_type.fmt(f)?;
+        f.write_str(">)")
     }
 }
 
 impl<T: PortType> MemPort<T> {
+    pub fn ty(&self) -> T::Port {
+        T::port_ty(self)
+    }
     pub fn source_location(&self) -> SourceLocation {
         self.source_location
     }
@@ -436,10 +388,10 @@ impl<T: PortType> MemPort<T> {
             index: self.port_index,
         }
     }
-    pub fn mem_element_type(&self) -> Interned<dyn DynCanonicalType> {
+    pub fn mem_element_type(&self) -> CanonicalType {
         self.mem_element_type
     }
-    pub fn addr_type(&self) -> DynUIntType {
+    pub fn addr_type(&self) -> UInt {
         self.addr_type
     }
     pub fn canonical(&self) -> MemPort<DynPortType> {
@@ -463,7 +415,6 @@ impl<T: PortType> MemPort<T> {
     pub fn from_canonical(port: MemPort<DynPortType>) -> Self
     where
         T: PortStruct,
-        T::Type: BundleType<Value = T>,
     {
         let MemPort {
             mem_name,
@@ -488,8 +439,8 @@ impl<T: PortType> MemPort<T> {
         mem_name: ScopedNameId,
         source_location: SourceLocation,
         port_name: PortName,
-        addr_type: DynUIntType,
-        mem_element_type: Interned<dyn DynCanonicalType>,
+        addr_type: UInt,
+        mem_element_type: CanonicalType,
     ) -> Self {
         assert!(
             mem_element_type.is_storable(),
@@ -520,10 +471,10 @@ pub enum ReadUnderWrite {
 }
 
 #[derive(Copy, Clone, PartialEq, Eq, Hash)]
-struct MemImpl<T: ArrayTypeTrait, P> {
+struct MemImpl<Element: Type, Len: Size, P> {
     scoped_name: ScopedNameId,
     source_location: SourceLocation,
-    array_type: T,
+    array_type: ArrayType<Element, Len>,
     initial_value: Option<Interned<BitSlice>>,
     ports: P,
     read_latency: usize,
@@ -533,11 +484,11 @@ struct MemImpl<T: ArrayTypeTrait, P> {
     mem_annotations: Interned<[Annotation]>,
 }
 
-pub struct Mem<VA: ValueArrayOrSlice + ?Sized>(
-    Interned<MemImpl<ArrayType<VA>, Interned<[Interned<MemPort<DynPortType>>]>>>,
+pub struct Mem<Element: Type = CanonicalType, Len: Size = DynSize>(
+    Interned<MemImpl<Element, Len, Interned<[MemPort<DynPortType>]>>>,
 );
 
-struct PortsDebug<'a>(&'a [Interned<MemPort<DynPortType>>]);
+struct PortsDebug<'a>(&'a [MemPort<DynPortType>]);
 
 impl fmt::Debug for PortsDebug<'_> {
     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
@@ -551,7 +502,7 @@ impl fmt::Debug for PortsDebug<'_> {
     }
 }
 
-impl<VA: ValueArrayOrSlice + ?Sized> fmt::Debug for Mem<VA> {
+impl<Element: Type, Len: Size> fmt::Debug for Mem<Element, Len> {
     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         let MemImpl {
             scoped_name,
@@ -579,37 +530,37 @@ impl<VA: ValueArrayOrSlice + ?Sized> fmt::Debug for Mem<VA> {
     }
 }
 
-impl<VA: ValueArrayOrSlice + ?Sized> Hash for Mem<VA> {
+impl<Element: Type, Len: Size> Hash for Mem<Element, Len> {
     fn hash<H: Hasher>(&self, state: &mut H) {
         self.0.hash(state);
     }
 }
 
-impl<VA: ValueArrayOrSlice + ?Sized> Eq for Mem<VA> {}
+impl<Element: Type, Len: Size> Eq for Mem<Element, Len> {}
 
-impl<VA: ValueArrayOrSlice + ?Sized> PartialEq for Mem<VA> {
+impl<Element: Type, Len: Size> PartialEq for Mem<Element, Len> {
     fn eq(&self, other: &Self) -> bool {
         self.0 == other.0
     }
 }
 
-impl<VA: ValueArrayOrSlice + ?Sized> Copy for Mem<VA> {}
+impl<Element: Type, Len: Size> Copy for Mem<Element, Len> {}
 
-impl<VA: ValueArrayOrSlice + ?Sized> Clone for Mem<VA> {
+impl<Element: Type, Len: Size> Clone for Mem<Element, Len> {
     fn clone(&self) -> Self {
         *self
     }
 }
 
-impl<VA: ValueArrayOrSlice + ?Sized> Mem<VA> {
+impl<Element: Type, Len: Size> Mem<Element, Len> {
     #[allow(clippy::too_many_arguments)]
     #[track_caller]
     pub fn new_unchecked(
         scoped_name: ScopedNameId,
         source_location: SourceLocation,
-        array_type: ArrayType<VA>,
+        array_type: ArrayType<Element, Len>,
         initial_value: Option<Interned<BitSlice>>,
-        ports: Interned<[Interned<MemPort<DynPortType>>]>,
+        ports: Interned<[MemPort<DynPortType>]>,
         read_latency: usize,
         write_latency: NonZeroU32,
         read_under_write: ReadUnderWrite,
@@ -617,14 +568,14 @@ impl<VA: ValueArrayOrSlice + ?Sized> Mem<VA> {
         mem_annotations: Interned<[Annotation]>,
     ) -> Self {
         if let Some(initial_value) = initial_value {
-            MemBuilder::<VA>::check_initial_value_bit_slice(
+            MemBuilder::<Element, Len>::check_initial_value_bit_slice(
                 array_type.element(),
                 Some(array_type.len()),
                 initial_value,
             );
         }
         let addr_width = memory_addr_width(array_type.len());
-        let expected_mem_element_type = array_type.element().canonical_dyn();
+        let expected_mem_element_type = array_type.element().canonical();
         assert!(
             expected_mem_element_type.is_storable(),
             "memory element type must be a storable type"
@@ -637,7 +588,7 @@ impl<VA: ValueArrayOrSlice + ?Sized> Mem<VA> {
                 port_index,
                 addr_type,
                 mem_element_type,
-            } = **port;
+            } = *port;
             assert_eq!(mem_name, scoped_name, "memory name must match with ports");
             assert_eq!(
                 port_index, index,
@@ -659,7 +610,7 @@ impl<VA: ValueArrayOrSlice + ?Sized> Mem<VA> {
             };
             assert_eq!(
                 Some(port),
-                ports.get(port.port_index).map(|v| &**v),
+                ports.get(port.port_index),
                 "port on memory must match annotation's target base"
             );
         }
@@ -682,13 +633,13 @@ impl<VA: ValueArrayOrSlice + ?Sized> Mem<VA> {
     pub fn source_location(self) -> SourceLocation {
         self.0.source_location
     }
-    pub fn array_type(self) -> ArrayType<VA> {
+    pub fn array_type(self) -> ArrayType<Element, Len> {
         self.0.array_type.clone()
     }
     pub fn initial_value(self) -> Option<Interned<BitSlice>> {
         self.0.initial_value
     }
-    pub fn ports(self) -> Interned<[Interned<MemPort<DynPortType>>]> {
+    pub fn ports(self) -> Interned<[MemPort<DynPortType>]> {
         self.0.ports
     }
     pub fn read_latency(self) -> usize {
@@ -706,7 +657,7 @@ impl<VA: ValueArrayOrSlice + ?Sized> Mem<VA> {
     pub fn mem_annotations(self) -> Interned<[Annotation]> {
         self.0.mem_annotations
     }
-    pub fn canonical(self) -> Mem<[DynCanonicalValue]> {
+    pub fn canonical(self) -> Mem {
         let MemImpl {
             scoped_name,
             source_location,
@@ -719,7 +670,7 @@ impl<VA: ValueArrayOrSlice + ?Sized> Mem<VA> {
             port_annotations,
             mem_annotations,
         } = *self.0;
-        let array_type = array_type.canonical();
+        let array_type = array_type.as_dyn_array();
         Mem(Intern::intern_sized(MemImpl {
             scoped_name,
             source_location,
@@ -751,10 +702,10 @@ impl<T: fmt::Debug> fmt::Debug for MaybeSpecified<T> {
 pub(crate) struct MemBuilderTarget {
     pub(crate) scoped_name: ScopedNameId,
     pub(crate) source_location: SourceLocation,
-    pub(crate) mem_element_type: Interned<dyn DynCanonicalType>,
+    pub(crate) mem_element_type: CanonicalType,
     pub(crate) depth: Option<usize>,
     pub(crate) initial_value: Option<Interned<BitSlice>>,
-    pub(crate) ports: Vec<Interned<MemPort<DynPortType>>>,
+    pub(crate) ports: Vec<MemPort<DynPortType>>,
     pub(crate) read_latency: usize,
     pub(crate) write_latency: NonZeroU32,
     pub(crate) read_under_write: ReadUnderWrite,
@@ -763,11 +714,11 @@ pub(crate) struct MemBuilderTarget {
 }
 
 impl MemBuilderTarget {
-    pub(crate) fn make_memory(&self) -> Option<Mem<[DynCanonicalValue]>> {
+    pub(crate) fn make_memory(&self) -> Option<Mem> {
         Some(Mem::new_unchecked(
             self.scoped_name,
             self.source_location,
-            ArrayType::new_slice(self.mem_element_type, self.depth?),
+            ArrayType::new_dyn(self.mem_element_type, self.depth?),
             self.initial_value,
             Intern::intern(&self.ports),
             self.read_latency,
@@ -817,16 +768,18 @@ impl fmt::Debug for MemBuilderTarget {
     }
 }
 
-pub struct MemBuilder<VA: ValueArrayOrSlice + ?Sized> {
-    mem_element_type: VA::ElementType,
+pub struct MemBuilder<Element: Type, Len: Size = DynSize> {
+    mem_element_type: Element,
     target: Rc<RefCell<MemBuilderTarget>>,
+    _phantom: PhantomData<Len>,
 }
 
-impl<VA: ValueArrayOrSlice + ?Sized> fmt::Debug for MemBuilder<VA> {
+impl<Element: Type, Len: Size> fmt::Debug for MemBuilder<Element, Len> {
     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         let Self {
             mem_element_type,
             target,
+            _phantom: _,
         } = &self;
         target.borrow().debug_fmt("MemBuilder", mem_element_type, f)
     }
@@ -838,15 +791,16 @@ pub fn memory_addr_width(depth: usize) -> usize {
         .map_or(usize::BITS, usize::ilog2) as usize
 }
 
-impl<VA: ValueArrayOrSlice + ?Sized> MemBuilder<VA> {
+impl<Element: Type, Len: Size> MemBuilder<Element, Len> {
     #[track_caller]
     fn check_initial_value_bit_slice(
-        mem_element_type: &VA::ElementType,
+        mem_element_type: Element,
         depth: Option<usize>,
         initial_value: Interned<BitSlice>,
     ) -> Interned<BitSlice> {
+        let element_bit_width = mem_element_type.canonical().bit_width();
         if let Some(depth) = depth {
-            let expected_len = depth.checked_mul(mem_element_type.bit_width()).expect(
+            let expected_len = depth.checked_mul(element_bit_width).expect(
                 "memory must be small enough that its initializer bit length fits in usize",
             );
             assert_eq!(
@@ -858,7 +812,7 @@ impl<VA: ValueArrayOrSlice + ?Sized> MemBuilder<VA> {
         assert!(
             initial_value
                 .len()
-                .checked_rem(mem_element_type.bit_width())
+                .checked_rem(element_bit_width)
                 .unwrap_or(initial_value.len())
                 == 0,
             "Mem's initializer bit length must be a multiple of the element type's bit width",
@@ -867,14 +821,14 @@ impl<VA: ValueArrayOrSlice + ?Sized> MemBuilder<VA> {
     }
     #[track_caller]
     fn check_initial_value_expr(
-        mem_element_type: &VA::ElementType,
+        mem_element_type: &Element,
         depth: Option<usize>,
-        initial_value: Expr<Array<[DynCanonicalValue]>>,
+        initial_value: Expr<Array>,
     ) -> Interned<BitSlice> {
-        let initial_value_ty = initial_value.canonical_type();
+        let initial_value_ty = Expr::ty(initial_value);
         assert_eq!(
             *mem_element_type,
-            <VA::ElementType as DynType>::from_dyn_canonical_type(*initial_value_ty.element()),
+            Element::from_canonical(initial_value_ty.element()),
             "Mem's element type must match initializer's element type",
         );
         if let Some(depth) = depth {
@@ -889,7 +843,7 @@ impl<VA: ValueArrayOrSlice + ?Sized> MemBuilder<VA> {
         };
         debug_assert_eq!(
             retval.len(),
-            initial_value_ty.bit_width(),
+            initial_value_ty.type_properties().bit_width,
             "initial value produced wrong literal bits length"
         );
         retval
@@ -898,9 +852,9 @@ impl<VA: ValueArrayOrSlice + ?Sized> MemBuilder<VA> {
     pub(crate) fn new(
         scoped_name: ScopedNameId,
         source_location: SourceLocation,
-        mem_element_type: VA::ElementType,
+        mem_element_type: Element,
     ) -> (Self, Rc<RefCell<MemBuilderTarget>>) {
-        let canonical_mem_element_type = mem_element_type.canonical_dyn();
+        let canonical_mem_element_type = mem_element_type.canonical();
         assert!(
             canonical_mem_element_type.is_storable(),
             "memory element type must be a storable type"
@@ -909,7 +863,7 @@ impl<VA: ValueArrayOrSlice + ?Sized> MemBuilder<VA> {
             scoped_name,
             source_location,
             mem_element_type: canonical_mem_element_type,
-            depth: VA::FIXED_LEN_TYPE.map(VA::len_from_len_type),
+            depth: Len::KNOWN_VALUE,
             initial_value: None,
             ports: vec![],
             read_latency: 0,
@@ -922,6 +876,7 @@ impl<VA: ValueArrayOrSlice + ?Sized> MemBuilder<VA> {
             Self {
                 mem_element_type,
                 target: Rc::clone(&target),
+                _phantom: PhantomData,
             },
             target,
         )
@@ -931,19 +886,19 @@ impl<VA: ValueArrayOrSlice + ?Sized> MemBuilder<VA> {
         &mut self,
         source_location: SourceLocation,
         port_kind: PortKind,
-    ) -> Interned<MemPort<DynPortType>> {
+    ) -> MemPort<DynPortType> {
         let mut target = self.target.borrow_mut();
         let Some(depth) = target.depth else {
             panic!("MemBuilder::depth must be called before adding ports");
         };
-        let port = Intern::intern_sized(MemPort {
+        let port = MemPort {
             mem_name: target.scoped_name,
             source_location,
             port_kind,
             port_index: target.ports.len(),
-            addr_type: DynUIntType::new(memory_addr_width(depth)),
+            addr_type: UInt::new(memory_addr_width(depth)),
             mem_element_type: target.mem_element_type,
-        });
+        };
         target.ports.push(port);
         port
     }
@@ -952,50 +907,53 @@ impl<VA: ValueArrayOrSlice + ?Sized> MemBuilder<VA> {
         &mut self,
         source_location: SourceLocation,
         kind: PortKind,
-    ) -> Expr<DynBundle> {
-        Expr::new_unchecked(ExprEnum::MemPort(self.new_port_impl(source_location, kind)))
+    ) -> Expr<Bundle> {
+        self.new_port_impl(source_location, kind).to_expr()
     }
     #[track_caller]
-    pub fn new_port(&mut self, kind: PortKind) -> Expr<DynBundle> {
+    pub fn new_port(&mut self, kind: PortKind) -> Expr<Bundle> {
         self.new_port_with_loc(SourceLocation::caller(), kind)
     }
     #[track_caller]
     pub fn new_read_port_with_loc(
         &mut self,
         source_location: SourceLocation,
-    ) -> Expr<ReadStruct<VA::Element>> {
-        Expr::new_unchecked(ExprEnum::MemPort(
-            self.new_port_impl(source_location, PortKind::ReadOnly),
-        ))
+    ) -> Expr<ReadStruct<Element, DynSize>> {
+        Expr::from_bundle(
+            self.new_port_impl(source_location, PortKind::ReadOnly)
+                .to_expr(),
+        )
     }
     #[track_caller]
-    pub fn new_read_port(&mut self) -> Expr<ReadStruct<VA::Element>> {
+    pub fn new_read_port(&mut self) -> Expr<ReadStruct<Element, DynSize>> {
         self.new_read_port_with_loc(SourceLocation::caller())
     }
     #[track_caller]
     pub fn new_write_port_with_loc(
         &mut self,
         source_location: SourceLocation,
-    ) -> Expr<WriteStruct<VA::Element>> {
-        Expr::new_unchecked(ExprEnum::MemPort(
-            self.new_port_impl(source_location, PortKind::WriteOnly),
-        ))
+    ) -> Expr<WriteStruct<Element, DynSize>> {
+        Expr::from_bundle(
+            self.new_port_impl(source_location, PortKind::WriteOnly)
+                .to_expr(),
+        )
     }
     #[track_caller]
-    pub fn new_write_port(&mut self) -> Expr<WriteStruct<VA::Element>> {
+    pub fn new_write_port(&mut self) -> Expr<WriteStruct<Element, DynSize>> {
         self.new_write_port_with_loc(SourceLocation::caller())
     }
     #[track_caller]
     pub fn new_rw_port_with_loc(
         &mut self,
         source_location: SourceLocation,
-    ) -> Expr<ReadWriteStruct<VA::Element>> {
-        Expr::new_unchecked(ExprEnum::MemPort(
-            self.new_port_impl(source_location, PortKind::ReadWrite),
-        ))
+    ) -> Expr<ReadWriteStruct<Element, DynSize>> {
+        Expr::from_bundle(
+            self.new_port_impl(source_location, PortKind::ReadWrite)
+                .to_expr(),
+        )
     }
     #[track_caller]
-    pub fn new_rw_port(&mut self) -> Expr<ReadWriteStruct<VA::Element>> {
+    pub fn new_rw_port(&mut self) -> Expr<ReadWriteStruct<Element, DynSize>> {
         self.new_rw_port_with_loc(SourceLocation::caller())
     }
     pub fn scoped_name(&self) -> ScopedNameId {
@@ -1004,7 +962,7 @@ impl<VA: ValueArrayOrSlice + ?Sized> MemBuilder<VA> {
     pub fn source_location(&self) -> SourceLocation {
         self.target.borrow().source_location
     }
-    pub fn get_mem_element_type(&self) -> &VA::ElementType {
+    pub fn get_mem_element_type(&self) -> &Element {
         &self.mem_element_type
     }
     #[allow(clippy::result_unit_err)]
@@ -1027,28 +985,28 @@ impl<VA: ValueArrayOrSlice + ?Sized> MemBuilder<VA> {
         target.depth = Some(depth);
     }
     #[allow(clippy::result_unit_err)]
-    pub fn get_array_type(&self) -> Result<ArrayType<VA>, ()> {
-        Ok(ArrayType::new_with_len(
+    pub fn get_array_type(&self) -> Result<ArrayType<Element, Len>, ()> {
+        Ok(ArrayType::new(
             self.mem_element_type.clone(),
-            self.get_depth()?,
+            Len::from_usize(self.get_depth()?),
         ))
     }
     pub fn get_initial_value(&self) -> Option<Interned<BitSlice>> {
         self.target.borrow().initial_value
     }
     #[track_caller]
-    pub fn initial_value(&mut self, initial_value: impl ToExpr<Type = ArrayType<VA>>) {
+    pub fn initial_value(&mut self, initial_value: impl ToExpr<Type = ArrayType<Element, Len>>) {
         let mut target = self.target.borrow_mut();
         if target.initial_value.is_some() {
             panic!("can't set Mem's initial value more than once");
         }
-        let initial_value = initial_value.to_expr().canonical();
+        let initial_value = Expr::as_dyn_array(initial_value.to_expr());
         target.initial_value = Some(Self::check_initial_value_expr(
             &self.mem_element_type,
             target.depth,
             initial_value,
         ));
-        target.depth = Some(initial_value.ty().len());
+        target.depth = Some(Expr::ty(initial_value).len());
     }
     #[track_caller]
     pub fn initial_value_bit_slice(&mut self, initial_value: Interned<BitSlice>) {
@@ -1057,11 +1015,11 @@ impl<VA: ValueArrayOrSlice + ?Sized> MemBuilder<VA> {
             panic!("can't set Mem's initial value more than once");
         }
         target.initial_value = Some(Self::check_initial_value_bit_slice(
-            &self.mem_element_type,
+            self.mem_element_type,
             target.depth,
             initial_value,
         ));
-        let element_bit_width = self.mem_element_type.bit_width();
+        let element_bit_width = self.mem_element_type.canonical().bit_width();
         if element_bit_width != 0 {
             target.depth = Some(initial_value.len() / element_bit_width);
         }

crates/fayalite/src/module/transform/simplify_enums.rs

@@ -2,10 +2,14 @@
 // See Notices.txt for copyright information
 use crate::{
     array::{Array, ArrayType},
-    bundle::{BundleType, BundleValue, DynBundle, DynBundleType},
-    enum_::{DynEnum, DynEnumType, EnumType, EnumValue, VariantType},
-    expr::{ops, Expr, ExprEnum, ToExpr},
-    int::{DynUInt, DynUIntType, IntCmp},
+    bundle::{Bundle, BundleType},
+    enum_::{Enum, EnumType, EnumVariant},
+    expr::{
+        ops::{self, EnumLiteral},
+        CastBitsTo, CastToBits, Expr, ExprEnum, ToExpr,
+    },
+    hdl,
+    int::{DynSize, IntCmp, Size, UInt, UIntType},
     intern::{Intern, Interned},
     memory::{DynPortType, Mem, MemPort},
     module::{
@@ -13,7 +17,7 @@ use crate::{
         Block, Module, NameIdGen, ScopedNameId, Stmt, StmtConnect, StmtIf, StmtMatch, StmtWire,
     },
     source_location::SourceLocation,
-    ty::{DynCanonicalType, DynCanonicalValue, Type, TypeEnum, Value, ValueEnum},
+    ty::{CanonicalType, Type},
     wire::Wire,
 };
 use core::fmt;
@@ -21,7 +25,7 @@ use hashbrown::HashMap;
 
 #[derive(Debug)]
 pub enum SimplifyEnumsError {
-    EnumIsNotCastableFromBits { enum_type: DynEnumType },
+    EnumIsNotCastableFromBits { enum_type: Enum },
 }
 
 impl fmt::Display for SimplifyEnumsError {
@@ -37,26 +41,23 @@ impl fmt::Display for SimplifyEnumsError {
 
 impl std::error::Error for SimplifyEnumsError {}
 
-#[derive(Value, Clone, Eq, PartialEq, Hash, Debug)]
-struct TagAndBody<T> {
+#[hdl]
+struct TagAndBody<T, BodyWidth: Size> {
     tag: T,
-    body: DynUInt,
+    body: UIntType<BodyWidth>,
 }
 
-type TagAndBodyType<T> = <TagAndBody<T> as ToExpr>::Type;
-
 #[derive(Clone, Debug)]
 enum EnumTypeState {
-    TagEnumAndBody(TagAndBodyType<DynEnum>),
-    TagUIntAndBody(TagAndBodyType<DynUInt>),
-    UInt(DynUIntType),
+    TagEnumAndBody(TagAndBody<Enum, DynSize>),
+    TagUIntAndBody(TagAndBody<UInt, DynSize>),
+    UInt(UInt),
     Unchanged,
 }
 
 struct State {
-    enum_types: HashMap<DynEnumType, EnumTypeState>,
-    replacement_mem_ports:
-        HashMap<Interned<MemPort<DynPortType>>, Interned<Wire<Interned<dyn DynCanonicalType>>>>,
+    enum_types: HashMap<Enum, EnumTypeState>,
+    replacement_mem_ports: HashMap<MemPort<DynPortType>, Wire<CanonicalType>>,
     kind: SimplifyEnumsKind,
     name_id_gen: NameIdGen,
 }
@@ -64,12 +65,12 @@ struct State {
 impl State {
     fn get_or_make_enum_type_state(
         &mut self,
-        enum_type: DynEnumType,
+        enum_type: Enum,
     ) -> Result<EnumTypeState, SimplifyEnumsError> {
         if let Some(retval) = self.enum_types.get(&enum_type) {
             return Ok(retval.clone());
         }
-        if !enum_type.is_castable_from_bits() {
+        if !enum_type.type_properties().is_castable_from_bits {
             return Err(SimplifyEnumsError::EnumIsNotCastableFromBits { enum_type });
         }
         let has_body = enum_type
@@ -78,29 +79,29 @@ impl State {
             .any(|variant| variant.ty.is_some());
         let retval = match (self.kind, has_body) {
             (SimplifyEnumsKind::SimplifyToEnumsWithNoBody, true) => {
-                EnumTypeState::TagEnumAndBody(TagAndBodyType::<DynEnum> {
-                    tag: DynEnumType::new(Interned::from_iter(enum_type.variants().iter().map(
-                        |v| VariantType {
+                EnumTypeState::TagEnumAndBody(TagAndBody {
+                    tag: Enum::new(Interned::from_iter(enum_type.variants().iter().map(|v| {
+                        EnumVariant {
                             name: v.name,
                             ty: None,
-                        },
-                    ))),
-                    body: DynUIntType::new(
-                        enum_type.bit_width() - enum_type.discriminant_bit_width(),
+                        }
+                    }))),
+                    body: UInt::new_dyn(
+                        enum_type.type_properties().bit_width - enum_type.discriminant_bit_width(),
                     ),
                 })
             }
             (SimplifyEnumsKind::SimplifyToEnumsWithNoBody, false) => EnumTypeState::Unchanged,
             (SimplifyEnumsKind::ReplaceWithBundleOfUInts, _) => {
-                EnumTypeState::TagUIntAndBody(TagAndBodyType::<DynUInt> {
-                    tag: DynUIntType::new(enum_type.discriminant_bit_width()),
-                    body: DynUIntType::new(
-                        enum_type.bit_width() - enum_type.discriminant_bit_width(),
+                EnumTypeState::TagUIntAndBody(TagAndBody {
+                    tag: UInt::new_dyn(enum_type.discriminant_bit_width()),
+                    body: UInt::new_dyn(
+                        enum_type.type_properties().bit_width - enum_type.discriminant_bit_width(),
                     ),
                 })
             }
             (SimplifyEnumsKind::ReplaceWithUInt, _) => {
-                EnumTypeState::UInt(DynUIntType::new(enum_type.bit_width()))
+                EnumTypeState::UInt(UInt::new_dyn(enum_type.type_properties().bit_width))
             }
         };
         self.enum_types.insert(enum_type, retval.clone());
@@ -108,21 +109,14 @@ impl State {
     }
 }
 
-fn value_to_uint<T: Value>(value: Option<&T>, target_ty: DynUIntType) -> DynUInt {
-    let Some(value) = value else {
-        return DynUInt::with_type(target_ty, 0u8);
-    };
-    DynUInt::from_bit_slice(&value.to_bits())
-}
-
 fn connect_port(
     stmts: &mut Vec<Stmt>,
-    lhs: Expr<DynCanonicalValue>,
-    rhs: Expr<DynCanonicalValue>,
+    lhs: Expr<CanonicalType>,
+    rhs: Expr<CanonicalType>,
     source_location: SourceLocation,
 ) {
-    println!("connect_port: lhs={lhs:?} rhs={rhs:?}");
-    if lhs.canonical_type() == rhs.canonical_type() {
+    println!("connect_port:\nlhs={lhs:?}\nrhs={rhs:?}");
+    if Expr::ty(lhs) == Expr::ty(rhs) {
         stmts.push(
             dbg!(StmtConnect {
                 lhs,
@@ -133,55 +127,53 @@ fn connect_port(
         );
         return;
     }
-    match (
-        lhs.canonical_type().type_enum(),
-        rhs.canonical_type().type_enum(),
-    ) {
-        (TypeEnum::BundleType(lhs_type), TypeEnum::UInt(_)) => {
-            let lhs = lhs.with_type::<DynBundle>();
+    match (Expr::ty(lhs), Expr::ty(rhs)) {
+        (CanonicalType::Bundle(lhs_type), CanonicalType::UInt(_) | CanonicalType::Bool(_)) => {
+            let lhs = Expr::<Bundle>::from_canonical(lhs);
             for field in lhs_type.fields() {
                 assert!(!field.flipped);
-                connect_port(stmts, lhs.field(&field.name), rhs, source_location);
+                connect_port(stmts, Expr::field(lhs, &field.name), rhs, source_location);
             }
         }
-        (TypeEnum::UInt(_), TypeEnum::BundleType(rhs_type)) => {
-            let rhs = rhs.with_type::<DynBundle>();
+        (CanonicalType::UInt(_) | CanonicalType::Bool(_), CanonicalType::Bundle(rhs_type)) => {
+            let rhs = Expr::<Bundle>::from_canonical(rhs);
             for field in rhs_type.fields() {
                 assert!(!field.flipped);
-                connect_port(stmts, lhs, rhs.field(&field.name), source_location);
+                connect_port(stmts, lhs, Expr::field(rhs, &field.name), source_location);
             }
         }
-        (TypeEnum::BundleType(lhs_type), TypeEnum::BundleType(_)) => {
-            let lhs = lhs.with_type::<DynBundle>();
-            let rhs = rhs.with_type::<DynBundle>();
+        (CanonicalType::Bundle(lhs_type), CanonicalType::Bundle(_)) => {
+            let lhs = Expr::<Bundle>::from_canonical(lhs);
+            let rhs = Expr::<Bundle>::from_canonical(rhs);
             for field in lhs_type.fields() {
                 let (lhs_field, rhs_field) = if field.flipped {
-                    (rhs.field(&field.name), lhs.field(&field.name))
+                    (Expr::field(rhs, &field.name), Expr::field(lhs, &field.name))
                 } else {
-                    (lhs.field(&field.name), rhs.field(&field.name))
+                    (Expr::field(lhs, &field.name), Expr::field(rhs, &field.name))
                 };
                 connect_port(stmts, lhs_field, rhs_field, source_location);
             }
         }
-        (TypeEnum::ArrayType(lhs_type), TypeEnum::ArrayType(_)) => {
-            let lhs = lhs.with_type::<Array<[DynCanonicalValue]>>();
-            let rhs = rhs.with_type::<Array<[DynCanonicalValue]>>();
+        (CanonicalType::Array(lhs_type), CanonicalType::Array(_)) => {
+            let lhs = Expr::<Array>::from_canonical(lhs);
+            let rhs = Expr::<Array>::from_canonical(rhs);
             for index in 0..lhs_type.len() {
                 connect_port(stmts, lhs[index], rhs[index], source_location);
             }
         }
-        (TypeEnum::BundleType(_), _)
-        | (TypeEnum::EnumType(_), _)
-        | (TypeEnum::ArrayType(_), _)
-        | (TypeEnum::UInt(_), _)
-        | (TypeEnum::SInt(_), _)
-        | (TypeEnum::Clock(_), _)
-        | (TypeEnum::AsyncReset(_), _)
-        | (TypeEnum::SyncReset(_), _)
-        | (TypeEnum::Reset(_), _) => unreachable!(
+        (CanonicalType::Bundle(_), _)
+        | (CanonicalType::Enum(_), _)
+        | (CanonicalType::Array(_), _)
+        | (CanonicalType::UInt(_), _)
+        | (CanonicalType::SInt(_), _)
+        | (CanonicalType::Bool(_), _)
+        | (CanonicalType::Clock(_), _)
+        | (CanonicalType::AsyncReset(_), _)
+        | (CanonicalType::SyncReset(_), _)
+        | (CanonicalType::Reset(_), _) => unreachable!(
             "trying to connect memory ports:\n{:?}\n{:?}",
-            lhs.canonical_type().type_enum(),
-            rhs.canonical_type().type_enum(),
+            Expr::ty(lhs),
+            Expr::ty(rhs),
         ),
     }
 }
@@ -189,18 +181,11 @@ fn connect_port(
 impl Folder for State {
     type Error = SimplifyEnumsError;
 
-    fn fold_dyn_enum(&mut self, _v: DynEnum) -> Result<DynEnum, Self::Error> {
+    fn fold_enum(&mut self, _v: Enum) -> Result<Enum, Self::Error> {
         unreachable!()
     }
 
-    fn fold_dyn_enum_type(&mut self, _v: DynEnumType) -> Result<DynEnumType, Self::Error> {
-        unreachable!()
-    }
-
-    fn fold_module<T: BundleValue>(&mut self, v: Module<T>) -> Result<Module<T>, Self::Error>
-    where
-        T::Type: BundleType<Value = T>,
-    {
+    fn fold_module<T: BundleType>(&mut self, v: Module<T>) -> Result<Module<T>, Self::Error> {
         let old_name_id_gen =
             std::mem::replace(&mut self.name_id_gen, NameIdGen::for_module(v.canonical()));
         let retval = Fold::default_fold(v, self);
@@ -211,98 +196,86 @@ impl Folder for State {
     fn fold_expr_enum(&mut self, op: ExprEnum) -> Result<ExprEnum, Self::Error> {
         match op {
             ExprEnum::EnumLiteral(op) => Ok(match self.get_or_make_enum_type_state(op.ty())? {
-                EnumTypeState::TagEnumAndBody(TagAndBodyType::<DynEnum> { tag, body }) => {
-                    TagAndBodyType::<DynEnum>::builder()
-                        .field_tag(DynEnum::new_by_index(tag, op.variant_index(), None))
+                EnumTypeState::TagEnumAndBody(TagAndBody { tag, body }) => *Expr::expr_enum(
+                    <TagAndBody<Enum, DynSize> as BundleType>::Builder::default()
+                        .field_tag(EnumLiteral::new_by_index(tag, op.variant_index(), None))
                         .field_body(match op.variant_value() {
                             Some(variant_value) => variant_value.fold(self)?.cast_to_bits(),
-                            None => DynUInt::with_type(body, 0u8).to_expr(),
+                            None => body.zero().to_expr(),
                         })
-                        .build()
-                        .expr_enum()
-                }
-                EnumTypeState::TagUIntAndBody(TagAndBodyType::<DynUInt> { tag, body }) => {
-                    TagAndBodyType::<DynUInt>::builder()
-                        .field_tag(DynUInt::with_type(tag, op.variant_index()))
-                        .field_body(match op.variant_value() {
-                            Some(variant_value) => variant_value.fold(self)?.cast_to_bits(),
-                            None => DynUInt::with_type(body, 0u8).to_expr(),
-                        })
-                        .build()
-                        .expr_enum()
-                }
-                EnumTypeState::UInt(_) => TagAndBodyType::<DynUInt>::builder()
-                    .field_tag(DynUInt::with_type(
-                        DynUIntType::new(op.ty().discriminant_bit_width()),
-                        op.variant_index(),
-                    ))
-                    .field_body(match op.variant_value() {
-                        Some(variant_value) => variant_value.fold(self)?.cast_to_bits(),
-                        None => DynUInt::with_type(
-                            DynUIntType::new(
-                                op.ty().bit_width() - op.ty().discriminant_bit_width(),
+                        .to_expr(),
                 ),
-                            0u8,
+                EnumTypeState::TagUIntAndBody(TagAndBody { tag, body }) => *Expr::expr_enum(
+                    <TagAndBody<UInt, DynSize> as BundleType>::Builder::default()
+                        .field_tag(tag.from_int_wrapping(op.variant_index()))
+                        .field_body(match op.variant_value() {
+                            Some(variant_value) => variant_value.fold(self)?.cast_to_bits(),
+                            None => body.zero().to_expr(),
+                        })
+                        .to_expr(),
+                ),
+                EnumTypeState::UInt(_) => *Expr::expr_enum(
+                    <TagAndBody<UInt, DynSize> as BundleType>::Builder::default()
+                        .field_tag(
+                            UIntType::new(op.ty().discriminant_bit_width())
+                                .from_int_wrapping(op.variant_index()),
                         )
+                        .field_body(match op.variant_value() {
+                            Some(variant_value) => variant_value.fold(self)?.cast_to_bits(),
+                            None => UIntType::new(
+                                op.ty().type_properties().bit_width
+                                    - op.ty().discriminant_bit_width(),
+                            )
+                            .zero()
                             .to_expr(),
                         })
-                    .build()
-                    .cast_to_bits()
-                    .expr_enum(),
-                EnumTypeState::Unchanged => ExprEnum::EnumLiteral(
-                    ops::EnumLiteral::new_unchecked(
-                        op.variant_value().map(|v| v.fold(self)).transpose()?,
-                        op.variant_index(),
-                        op.ty(),
-                    )
-                    .intern_sized(),
+                        .cast_to_bits(),
                 ),
+                EnumTypeState::Unchanged => ExprEnum::EnumLiteral(ops::EnumLiteral::new_by_index(
+                    op.ty(),
+                    op.variant_index(),
+                    op.variant_value().map(|v| v.fold(self)).transpose()?,
+                )),
             }),
-            ExprEnum::VariantAccess(op) => {
-                Ok(match self.get_or_make_enum_type_state(op.base().ty())? {
+            ExprEnum::VariantAccess(op) => Ok(
+                match self.get_or_make_enum_type_state(Expr::ty(op.base()))? {
                     EnumTypeState::TagEnumAndBody(_) | EnumTypeState::TagUIntAndBody(_) => {
-                        match op.variant_type().ty {
-                            Some(_) => op
-                                .base()
-                                .expr_enum()
-                                .fold(self)?
-                                .to_expr()
-                                .with_type::<TagAndBody<DynCanonicalValue>>()
-                                .body[..op.ty().bit_width()]
-                                .cast_bits_to::<DynCanonicalValue>(op.ty())
-                                .expr_enum(),
-                            None => ().to_expr().expr_enum(),
+                        match op.variant_type() {
+                            Some(variant_type) => *Expr::expr_enum(
+                                Expr::<TagAndBody<CanonicalType, DynSize>>::from_canonical(
+                                    (*Expr::expr_enum(op.base())).fold(self)?.to_expr(),
+                                )
+                                .body[..variant_type.bit_width()]
+                                    .cast_bits_to(variant_type),
+                            ),
+                            None => *Expr::expr_enum(().to_expr()),
                         }
                     }
-                    EnumTypeState::UInt(_) => match op.variant_type().ty {
-                        Some(_) => {
-                            let base_int = op
-                                .base()
-                                .expr_enum()
-                                .fold(self)?
-                                .to_expr()
-                                .with_type::<DynUInt>();
+                    EnumTypeState::UInt(_) => match op.variant_type() {
+                        Some(variant_type) => {
+                            let base_int = Expr::<UInt>::from_canonical(
+                                (*Expr::expr_enum(op.base())).fold(self)?.to_expr(),
+                            );
                             dbg!(base_int);
-                            let base_ty = op.base().ty();
-                            let ty_bit_width = op.ty().bit_width();
-                            base_int[base_ty.discriminant_bit_width()..][..ty_bit_width]
-                                .cast_bits_to::<DynCanonicalValue>(op.ty())
-                                .expr_enum()
+                            let base_ty = Expr::ty(op.base());
+                            let variant_type_bit_width = variant_type.bit_width();
+                            *Expr::expr_enum(
+                                base_int[base_ty.discriminant_bit_width()..]
+                                    [..variant_type_bit_width]
+                                    .cast_bits_to(variant_type),
+                            )
                         }
-                        None => ().to_expr().expr_enum(),
+                        None => *Expr::expr_enum(().to_expr()),
                     },
-                    EnumTypeState::Unchanged => match op.variant_type().ty {
-                        Some(_) => ExprEnum::VariantAccess(
-                            ops::VariantAccess::new_unchecked(
+                    EnumTypeState::Unchanged => match op.variant_type() {
+                        Some(_) => ExprEnum::VariantAccess(ops::VariantAccess::new_by_index(
                             op.base().fold(self)?,
                             op.variant_index(),
-                            )
-                            .intern_sized(),
-                        ),
-                        None => ().to_expr().expr_enum(),
+                        )),
+                        None => *Expr::expr_enum(().to_expr()),
                     },
-                })
-            }
+                },
+            ),
             ExprEnum::MemPort(mem_port) => Ok(
                 if let Some(&wire) = self.replacement_mem_ports.get(&mem_port) {
                     ExprEnum::Wire(wire)
@@ -310,24 +283,34 @@ impl Folder for State {
                     ExprEnum::MemPort(mem_port.fold(self)?)
                 },
             ),
-            ExprEnum::Literal(_)
-            | ExprEnum::ArrayLiteral(_)
+            ExprEnum::UIntLiteral(_)
+            | ExprEnum::SIntLiteral(_)
+            | ExprEnum::BoolLiteral(_)
             | ExprEnum::BundleLiteral(_)
+            | ExprEnum::ArrayLiteral(_)
             | ExprEnum::NotU(_)
             | ExprEnum::NotS(_)
+            | ExprEnum::NotB(_)
             | ExprEnum::Neg(_)
             | ExprEnum::BitAndU(_)
             | ExprEnum::BitAndS(_)
+            | ExprEnum::BitAndB(_)
             | ExprEnum::BitOrU(_)
             | ExprEnum::BitOrS(_)
+            | ExprEnum::BitOrB(_)
             | ExprEnum::BitXorU(_)
             | ExprEnum::BitXorS(_)
+            | ExprEnum::BitXorB(_)
             | ExprEnum::AddU(_)
             | ExprEnum::AddS(_)
             | ExprEnum::SubU(_)
             | ExprEnum::SubS(_)
             | ExprEnum::MulU(_)
             | ExprEnum::MulS(_)
+            | ExprEnum::DivU(_)
+            | ExprEnum::DivS(_)
+            | ExprEnum::RemU(_)
+            | ExprEnum::RemS(_)
             | ExprEnum::DynShlU(_)
             | ExprEnum::DynShlS(_)
             | ExprEnum::DynShrU(_)
@@ -336,41 +319,68 @@ impl Folder for State {
             | ExprEnum::FixedShlS(_)
             | ExprEnum::FixedShrU(_)
             | ExprEnum::FixedShrS(_)
+            | ExprEnum::CmpLtB(_)
+            | ExprEnum::CmpLeB(_)
+            | ExprEnum::CmpGtB(_)
+            | ExprEnum::CmpGeB(_)
+            | ExprEnum::CmpEqB(_)
+            | ExprEnum::CmpNeB(_)
             | ExprEnum::CmpLtU(_)
-            | ExprEnum::CmpLtS(_)
             | ExprEnum::CmpLeU(_)
-            | ExprEnum::CmpLeS(_)
             | ExprEnum::CmpGtU(_)
-            | ExprEnum::CmpGtS(_)
             | ExprEnum::CmpGeU(_)
-            | ExprEnum::CmpGeS(_)
             | ExprEnum::CmpEqU(_)
-            | ExprEnum::CmpEqS(_)
             | ExprEnum::CmpNeU(_)
+            | ExprEnum::CmpLtS(_)
+            | ExprEnum::CmpLeS(_)
+            | ExprEnum::CmpGtS(_)
+            | ExprEnum::CmpGeS(_)
+            | ExprEnum::CmpEqS(_)
             | ExprEnum::CmpNeS(_)
             | ExprEnum::CastUIntToUInt(_)
             | ExprEnum::CastUIntToSInt(_)
             | ExprEnum::CastSIntToUInt(_)
             | ExprEnum::CastSIntToSInt(_)
-            | ExprEnum::SliceUInt(_)
-            | ExprEnum::SliceSInt(_)
-            | ExprEnum::ReduceBitAnd(_)
-            | ExprEnum::ReduceBitOr(_)
-            | ExprEnum::ReduceBitXor(_)
+            | ExprEnum::CastBoolToUInt(_)
+            | ExprEnum::CastBoolToSInt(_)
+            | ExprEnum::CastUIntToBool(_)
+            | ExprEnum::CastSIntToBool(_)
+            | ExprEnum::CastBoolToSyncReset(_)
+            | ExprEnum::CastUIntToSyncReset(_)
+            | ExprEnum::CastSIntToSyncReset(_)
+            | ExprEnum::CastBoolToAsyncReset(_)
+            | ExprEnum::CastUIntToAsyncReset(_)
+            | ExprEnum::CastSIntToAsyncReset(_)
+            | ExprEnum::CastSyncResetToBool(_)
+            | ExprEnum::CastSyncResetToUInt(_)
+            | ExprEnum::CastSyncResetToSInt(_)
+            | ExprEnum::CastSyncResetToReset(_)
+            | ExprEnum::CastAsyncResetToBool(_)
+            | ExprEnum::CastAsyncResetToUInt(_)
+            | ExprEnum::CastAsyncResetToSInt(_)
+            | ExprEnum::CastAsyncResetToReset(_)
+            | ExprEnum::CastResetToBool(_)
+            | ExprEnum::CastResetToUInt(_)
+            | ExprEnum::CastResetToSInt(_)
+            | ExprEnum::CastBoolToClock(_)
+            | ExprEnum::CastUIntToClock(_)
+            | ExprEnum::CastSIntToClock(_)
+            | ExprEnum::CastClockToBool(_)
+            | ExprEnum::CastClockToUInt(_)
+            | ExprEnum::CastClockToSInt(_)
             | ExprEnum::FieldAccess(_)
             | ExprEnum::ArrayIndex(_)
             | ExprEnum::DynArrayIndex(_)
+            | ExprEnum::ReduceBitAndU(_)
+            | ExprEnum::ReduceBitAndS(_)
+            | ExprEnum::ReduceBitOrU(_)
+            | ExprEnum::ReduceBitOrS(_)
+            | ExprEnum::ReduceBitXorU(_)
+            | ExprEnum::ReduceBitXorS(_)
+            | ExprEnum::SliceUInt(_)
+            | ExprEnum::SliceSInt(_)
             | ExprEnum::CastToBits(_)
             | ExprEnum::CastBitsTo(_)
-            | ExprEnum::CastBitToClock(_)
-            | ExprEnum::CastBitToSyncReset(_)
-            | ExprEnum::CastBitToAsyncReset(_)
-            | ExprEnum::CastSyncResetToReset(_)
-            | ExprEnum::CastAsyncResetToReset(_)
-            | ExprEnum::CastClockToBit(_)
-            | ExprEnum::CastSyncResetToBit(_)
-            | ExprEnum::CastAsyncResetToBit(_)
-            | ExprEnum::CastResetToBit(_)
             | ExprEnum::ModuleIO(_)
             | ExprEnum::Instance(_)
             | ExprEnum::Wire(_)
@@ -382,7 +392,7 @@ impl Folder for State {
         let mut memories = vec![];
         let mut stmts = vec![];
         for memory in block.memories {
-            let old_element_ty = *memory.array_type().element();
+            let old_element_ty = memory.array_type().element();
             let new_element_ty = memory.array_type().element().fold(self)?;
             if new_element_ty != old_element_ty {
                 let mut new_ports = vec![];
@@ -394,7 +404,7 @@ impl Folder for State {
                         port.addr_type(),
                         new_element_ty,
                     );
-                    new_ports.push(new_port.intern());
+                    new_ports.push(new_port);
                     let new_port_ty = new_port.ty();
                     let mut wire_ty_fields = Vec::from_iter(new_port_ty.fields());
                     if let Some(wmask_name) = new_port.port_kind().wmask_name() {
@@ -404,7 +414,7 @@ impl Folder for State {
                             .unwrap();
                         wire_ty_fields[index].ty = port.ty().fields()[index].ty;
                     }
-                    let wire_ty = DynBundleType::new(Intern::intern_owned(wire_ty_fields));
+                    let wire_ty = Bundle::new(Intern::intern_owned(wire_ty_fields));
                     if wire_ty == new_port_ty {
                         continue;
                     }
@@ -419,23 +429,22 @@ impl Folder for State {
                     stmts.push(
                         StmtWire {
                             annotations: Default::default(),
-                            wire: wire.to_dyn_canonical_wire(),
+                            wire: wire.canonical(),
                         }
                         .into(),
                     );
                     connect_port(
                         &mut stmts,
-                        new_port.to_expr().to_canonical_dyn(),
-                        wire.to_expr().to_canonical_dyn(),
+                        Expr::canonical(new_port.to_expr()),
+                        Expr::canonical(wire.to_expr()),
                         port.source_location(),
                     );
-                    self.replacement_mem_ports
-                        .insert(port, wire.to_dyn_canonical_wire().intern_sized());
+                    self.replacement_mem_ports.insert(port, wire.canonical());
                 }
                 memories.push(Mem::new_unchecked(
                     memory.scoped_name(),
                     memory.source_location(),
-                    ArrayType::new_slice(new_element_ty, memory.array_type().len()),
+                    ArrayType::new_dyn(new_element_ty, memory.array_type().len()),
                     memory.initial_value(),
                     Intern::intern_owned(new_ports),
                     memory.read_latency(),
@@ -458,7 +467,7 @@ impl Folder for State {
     fn fold_stmt(&mut self, stmt: Stmt) -> Result<Stmt, Self::Error> {
         fn match_int_tag(
             state: &mut State,
-            int_tag_expr: Expr<DynUInt>,
+            int_tag_expr: Expr<UInt>,
             source_location: SourceLocation,
             blocks: Interned<[Block]>,
         ) -> Result<StmtIf, SimplifyEnumsError> {
@@ -473,16 +482,15 @@ impl Folder for State {
                 });
             };
             let mut retval = StmtIf {
-                cond: int_tag_expr.cmp_eq(DynUInt::with_type(
-                    int_tag_expr.ty(),
-                    next_to_last_variant_index,
-                )),
+                cond: int_tag_expr
+                    .cmp_eq(Expr::ty(int_tag_expr).from_int_wrapping(next_to_last_variant_index)),
                 source_location,
                 blocks: [next_to_last_block.fold(state)?, last_block.fold(state)?],
             };
             for (variant_index, block) in blocks_iter.rev() {
                 retval = StmtIf {
-                    cond: int_tag_expr.cmp_eq(DynUInt::with_type(int_tag_expr.ty(), variant_index)),
+                    cond: int_tag_expr
+                        .cmp_eq(Expr::ty(int_tag_expr).from_int_wrapping(variant_index)),
                     source_location,
                     blocks: [
                         block.fold(state)?,
@@ -500,33 +508,27 @@ impl Folder for State {
                 expr,
                 source_location,
                 blocks,
-            }) => match self.get_or_make_enum_type_state(expr.ty())? {
+            }) => match self.get_or_make_enum_type_state(Expr::ty(expr))? {
                 EnumTypeState::TagEnumAndBody(_) => Ok(StmtMatch {
-                    expr: expr
-                        .expr_enum()
-                        .fold(self)?
-                        .to_expr()
-                        .with_type::<TagAndBody<DynEnum>>()
+                    expr: Expr::<TagAndBody<Enum, DynSize>>::from_canonical(
+                        Expr::canonical(expr).fold(self)?,
+                    )
                     .tag,
                     source_location,
                     blocks: blocks.fold(self)?,
                 }
                 .into()),
                 EnumTypeState::TagUIntAndBody(_) => {
-                    let int_tag_expr = expr
-                        .expr_enum()
-                        .fold(self)?
-                        .to_expr()
-                        .with_type::<TagAndBody<DynUInt>>()
+                    let int_tag_expr = Expr::<TagAndBody<UInt, DynSize>>::from_canonical(
+                        Expr::canonical(expr).fold(self)?,
+                    )
                     .tag;
                     Ok(match_int_tag(self, int_tag_expr, source_location, blocks)?.into())
                 }
                 EnumTypeState::UInt(_) => {
-                    let int_tag_expr = expr
-                        .expr_enum()
-                        .fold(self)?
-                        .to_expr()
-                        .with_type::<DynUInt>()[..expr.ty().discriminant_bit_width()];
+                    let int_tag_expr =
+                        Expr::<UInt>::from_canonical(Expr::canonical(expr).fold(self)?)
+                            [..Expr::ty(expr).discriminant_bit_width()];
                     Ok(match_int_tag(self, int_tag_expr, source_location, blocks)?.into())
                 }
                 EnumTypeState::Unchanged => Ok(StmtMatch {
@@ -544,92 +546,49 @@ impl Folder for State {
         unreachable!()
     }
 
-    fn fold_type_enum(&mut self, type_enum: TypeEnum) -> Result<TypeEnum, Self::Error> {
-        match type_enum {
-            TypeEnum::EnumType(enum_type) => {
+    fn fold_canonical_type(
+        &mut self,
+        canonical_type: CanonicalType,
+    ) -> Result<CanonicalType, Self::Error> {
+        match canonical_type {
+            CanonicalType::Enum(enum_type) => {
                 Ok(match self.get_or_make_enum_type_state(enum_type)? {
-                    EnumTypeState::TagEnumAndBody(ty) => TypeEnum::BundleType(ty.canonical()),
-                    EnumTypeState::TagUIntAndBody(ty) => TypeEnum::BundleType(ty.canonical()),
-                    EnumTypeState::UInt(ty) => TypeEnum::UInt(ty),
-                    EnumTypeState::Unchanged => TypeEnum::EnumType(enum_type),
+                    EnumTypeState::TagEnumAndBody(ty) => ty.canonical(),
+                    EnumTypeState::TagUIntAndBody(ty) => ty.canonical(),
+                    EnumTypeState::UInt(ty) => ty.canonical(),
+                    EnumTypeState::Unchanged => enum_type.canonical(),
                 })
             }
-            TypeEnum::BundleType(_)
-            | TypeEnum::ArrayType(_)
-            | TypeEnum::UInt(_)
-            | TypeEnum::SInt(_)
-            | TypeEnum::Clock(_)
-            | TypeEnum::AsyncReset(_)
-            | TypeEnum::SyncReset(_)
-            | TypeEnum::Reset(_) => type_enum.default_fold(self),
+            CanonicalType::Bundle(_)
+            | CanonicalType::Array(_)
+            | CanonicalType::UInt(_)
+            | CanonicalType::SInt(_)
+            | CanonicalType::Bool(_)
+            | CanonicalType::Clock(_)
+            | CanonicalType::AsyncReset(_)
+            | CanonicalType::SyncReset(_)
+            | CanonicalType::Reset(_) => canonical_type.default_fold(self),
         }
     }
 
-    fn fold_value_enum(&mut self, value_enum: ValueEnum) -> Result<ValueEnum, Self::Error> {
-        match value_enum {
-            ValueEnum::Enum(enum_value) => {
-                Ok(match self.get_or_make_enum_type_state(enum_value.ty())? {
-                    EnumTypeState::TagEnumAndBody(TagAndBodyType::<DynEnum> {
-                        tag: tag_ty,
-                        body: body_ty,
-                    }) => ValueEnum::Bundle(
-                        TagAndBody {
-                            tag: DynEnum::new_by_index(tag_ty, enum_value.variant_index(), None),
-                            body: value_to_uint(enum_value.variant_value().as_ref(), body_ty),
-                        }
-                        .to_canonical(),
-                    ),
-                    EnumTypeState::TagUIntAndBody(TagAndBodyType::<DynUInt> {
-                        tag: tag_ty,
-                        body: body_ty,
-                    }) => ValueEnum::Bundle(
-                        TagAndBody {
-                            tag: DynUInt::with_type(tag_ty, enum_value.variant_index()),
-                            body: value_to_uint(enum_value.variant_value().as_ref(), body_ty),
-                        }
-                        .to_canonical(),
-                    ),
-                    EnumTypeState::UInt(target_ty) => {
-                        ValueEnum::UInt(value_to_uint(Some(&enum_value), target_ty))
-                    }
-                    EnumTypeState::Unchanged => ValueEnum::Enum(enum_value),
-                })
-            }
-            ValueEnum::Bundle(_)
-            | ValueEnum::Array(_)
-            | ValueEnum::UInt(_)
-            | ValueEnum::SInt(_)
-            | ValueEnum::Clock(_)
-            | ValueEnum::AsyncReset(_)
-            | ValueEnum::SyncReset(_)
-            | ValueEnum::Reset(_) => value_enum.default_fold(self),
-        }
-    }
-
-    fn fold_variant_type<T>(&mut self, _v: VariantType<T>) -> Result<VariantType<T>, Self::Error> {
+    fn fold_enum_variant(&mut self, _v: EnumVariant) -> Result<EnumVariant, Self::Error> {
         unreachable!()
     }
 
-    fn fold_enum_literal<EnumTy>(
+    fn fold_enum_literal<T: EnumType>(
         &mut self,
-        _v: ops::EnumLiteral<EnumTy>,
-    ) -> Result<ops::EnumLiteral<EnumTy>, Self::Error>
+        _v: ops::EnumLiteral<T>,
+    ) -> Result<ops::EnumLiteral<T>, Self::Error>
     where
-        EnumTy: EnumType,
-        EnumTy::Value: EnumValue<Type = EnumTy>,
+        T: Fold<Self>,
     {
         unreachable!()
     }
 
-    fn fold_variant_access<T, VariantTy>(
+    fn fold_variant_access<VariantType: Type>(
         &mut self,
-        _v: ops::VariantAccess<T, VariantTy>,
-    ) -> Result<ops::VariantAccess<T, VariantTy>, Self::Error>
-    where
-        T: EnumType,
-        T::Value: EnumValue,
-        VariantTy: Type,
-    {
+        _v: ops::VariantAccess<VariantType>,
+    ) -> Result<ops::VariantAccess<VariantType>, Self::Error> {
         unreachable!()
     }
 }
@@ -642,9 +601,9 @@ pub enum SimplifyEnumsKind {
 }
 
 pub fn simplify_enums(
-    module: Interned<Module<DynBundle>>,
+    module: Interned<Module<Bundle>>,
     kind: SimplifyEnumsKind,
-) -> Result<Interned<Module<DynBundle>>, SimplifyEnumsError> {
+) -> Result<Interned<Module<Bundle>>, SimplifyEnumsError> {
     module.fold(&mut State {
         enum_types: HashMap::new(),
         replacement_mem_ports: HashMap::new(),

crates/fayalite/src/module/transform/simplify_memories.rs

@@ -2,10 +2,10 @@
 // See Notices.txt for copyright information
 use crate::{
     annotations::TargetedAnnotation,
-    array::{Array, ArrayType, ValueArrayOrSlice},
-    bundle::{BundleType, BundleValue, DynBundle},
-    expr::{Expr, ExprEnum, ToExpr},
-    int::{DynSInt, DynSIntType, DynUInt, DynUIntType},
+    array::Array,
+    bundle::{Bundle, BundleType},
+    expr::{CastBitsTo, CastToBits, Expr, ExprEnum, ToExpr},
+    int::{Bool, SInt, Size, UInt},
     intern::{Intern, Interned},
     memory::{Mem, MemPort, PortType},
     module::{
@@ -13,7 +13,7 @@ use crate::{
         Block, Module, NameId, NameIdGen, ScopedNameId, Stmt, StmtConnect, StmtWire,
     },
     source_location::SourceLocation,
-    ty::{DynCanonicalValue, DynType, Type, TypeEnum},
+    ty::{CanonicalType, Type},
     util::MakeMutSlice,
     wire::Wire,
 };
@@ -28,26 +28,31 @@ use std::{
 
 #[derive(Copy, Clone, PartialEq, Eq, Hash, Debug)]
 enum SingleType {
-    UInt(DynUIntType),
-    SInt(DynSIntType),
-    UIntArray(ArrayType<[DynUInt]>),
-    SIntArray(ArrayType<[DynSInt]>),
+    UInt(UInt),
+    SInt(SInt),
+    Bool(Bool),
+    UIntArray(Array<UInt>),
+    SIntArray(Array<SInt>),
+    BoolArray(Array<Bool>),
 }
 
 impl SingleType {
-    fn is_array_type(self, array_type: ArrayType<[DynCanonicalValue]>) -> bool {
+    fn is_array_type(self, array_type: Array) -> bool {
         match self {
-            SingleType::UInt(_) | SingleType::SInt(_) => false,
-            SingleType::UIntArray(ty) => ty.canonical() == array_type,
-            SingleType::SIntArray(ty) => ty.canonical() == array_type,
+            SingleType::UInt(_) | SingleType::SInt(_) | SingleType::Bool(_) => false,
+            SingleType::UIntArray(ty) => ty.as_dyn_array() == array_type,
+            SingleType::SIntArray(ty) => ty.as_dyn_array() == array_type,
+            SingleType::BoolArray(ty) => ty.as_dyn_array() == array_type,
         }
     }
     fn array_len(self) -> usize {
         match self {
             SingleType::UInt(_ty) => 1,
             SingleType::SInt(_ty) => 1,
+            SingleType::Bool(_ty) => 1,
             SingleType::UIntArray(ty) => ty.len(),
             SingleType::SIntArray(ty) => ty.len(),
+            SingleType::BoolArray(ty) => ty.len(),
         }
     }
 }
@@ -58,7 +63,7 @@ enum MemSplit {
         fields: Rc<[MemSplit]>,
     },
     Single {
-        output_mem: Option<Mem<[DynCanonicalValue]>>,
+        output_mem: Option<Mem>,
         element_type: SingleType,
         unchanged_element_type: bool,
     },
@@ -83,17 +88,17 @@ impl MemSplit {
             MemSplit::Array { elements: _ } => self,
         }
     }
-    fn new(element_type: TypeEnum) -> Self {
+    fn new(element_type: CanonicalType) -> Self {
         match element_type {
-            TypeEnum::BundleType(bundle_ty) => MemSplit::Bundle {
+            CanonicalType::Bundle(bundle_ty) => MemSplit::Bundle {
                 fields: bundle_ty
                     .fields()
                     .into_iter()
-                    .map(|field| Self::new(field.ty.type_enum()).mark_changed_element_type())
+                    .map(|field| Self::new(field.ty).mark_changed_element_type())
                     .collect(),
             },
-            TypeEnum::ArrayType(ty) => {
-                let element = MemSplit::new(ty.element().type_enum());
+            CanonicalType::Array(ty) => {
+                let element = MemSplit::new(ty.element());
                 if let Self::Single {
                     output_mem: _,
                     element_type,
@@ -103,7 +108,7 @@ impl MemSplit {
                     match element_type {
                         SingleType::UInt(element_type) => Self::Single {
                             output_mem: None,
-                            element_type: SingleType::UIntArray(ArrayType::new_slice(
+                            element_type: SingleType::UIntArray(Array::new_dyn(
                                 element_type,
                                 ty.len(),
                             )),
@@ -111,7 +116,15 @@ impl MemSplit {
                         },
                         SingleType::SInt(element_type) => Self::Single {
                             output_mem: None,
-                            element_type: SingleType::SIntArray(ArrayType::new_slice(
+                            element_type: SingleType::SIntArray(Array::new_dyn(
+                                element_type,
+                                ty.len(),
+                            )),
+                            unchanged_element_type,
+                        },
+                        SingleType::Bool(element_type) => Self::Single {
+                            output_mem: None,
+                            element_type: SingleType::BoolArray(Array::new_dyn(
                                 element_type,
                                 ty.len(),
                             )),
@@ -119,8 +132,8 @@ impl MemSplit {
                         },
                         SingleType::UIntArray(element_type) => Self::Single {
                             output_mem: None,
-                            element_type: SingleType::UIntArray(ArrayType::new_slice(
-                                *element_type.element(),
+                            element_type: SingleType::UIntArray(Array::new_dyn(
+                                element_type.element(),
                                 ty.len()
                                     .checked_mul(element_type.len())
                                     .expect("memory element type can't be too big"),
@@ -129,8 +142,18 @@ impl MemSplit {
                         },
                         SingleType::SIntArray(element_type) => Self::Single {
                             output_mem: None,
-                            element_type: SingleType::SIntArray(ArrayType::new_slice(
-                                *element_type.element(),
+                            element_type: SingleType::SIntArray(Array::new_dyn(
+                                element_type.element(),
+                                ty.len()
+                                    .checked_mul(element_type.len())
+                                    .expect("memory element type can't be too big"),
+                            )),
+                            unchanged_element_type: false,
+                        },
+                        SingleType::BoolArray(element_type) => Self::Single {
+                            output_mem: None,
+                            element_type: SingleType::BoolArray(Array::new_dyn(
+                                element_type.element(),
                                 ty.len()
                                     .checked_mul(element_type.len())
                                     .expect("memory element type can't be too big"),
@@ -145,25 +168,30 @@ impl MemSplit {
                     }
                 }
             }
-            TypeEnum::UInt(ty) => Self::Single {
+            CanonicalType::UInt(ty) => Self::Single {
                 output_mem: None,
                 element_type: SingleType::UInt(ty),
                 unchanged_element_type: true,
             },
-            TypeEnum::SInt(ty) => Self::Single {
+            CanonicalType::SInt(ty) => Self::Single {
                 output_mem: None,
                 element_type: SingleType::SInt(ty),
                 unchanged_element_type: true,
             },
-            TypeEnum::EnumType(ty) => Self::Single {
+            CanonicalType::Bool(ty) => Self::Single {
                 output_mem: None,
-                element_type: SingleType::UInt(DynUIntType::new(ty.bit_width())),
+                element_type: SingleType::Bool(ty),
+                unchanged_element_type: true,
+            },
+            CanonicalType::Enum(ty) => Self::Single {
+                output_mem: None,
+                element_type: SingleType::UInt(UInt::new_dyn(ty.type_properties().bit_width)),
                 unchanged_element_type: false,
             },
-            TypeEnum::Clock(_)
-            | TypeEnum::AsyncReset(_)
-            | TypeEnum::SyncReset(_)
-            | TypeEnum::Reset(_) => unreachable!("memory element type is a storable type"),
+            CanonicalType::Clock(_)
+            | CanonicalType::AsyncReset(_)
+            | CanonicalType::SyncReset(_)
+            | CanonicalType::Reset(_) => unreachable!("memory element type is a storable type"),
         }
     }
 }
@@ -173,9 +201,9 @@ struct MemState {
 }
 
 struct SplitState<'a> {
-    wire_rdata: Box<[Option<Expr<DynCanonicalValue>>]>,
-    wire_wdata: Box<[Option<Expr<DynCanonicalValue>>]>,
-    wire_wmask: Box<[Option<Expr<DynCanonicalValue>>]>,
+    wire_rdata: Box<[Option<Expr<CanonicalType>>]>,
+    wire_wdata: Box<[Option<Expr<CanonicalType>>]>,
+    wire_wmask: Box<[Option<Expr<CanonicalType>>]>,
     initial_value: Option<Box<[&'a BitSlice]>>,
 }
 
@@ -223,7 +251,7 @@ impl<'a> SplitStateStack<'a> {
     }
     fn push_map(
         &mut self,
-        mut wire_map: impl FnMut(Expr<DynCanonicalValue>) -> Expr<DynCanonicalValue>,
+        mut wire_map: impl FnMut(Expr<CanonicalType>) -> Expr<CanonicalType>,
         mut initial_value_element_map: impl FnMut(&BitSlice) -> &BitSlice,
     ) {
         let top_index = self.top_index + 1;
@@ -260,10 +288,10 @@ impl<'a> SplitStateStack<'a> {
 
 struct SplitMemState<'a, 'b> {
     module_state: &'a mut ModuleState,
-    input_mem: Mem<[DynCanonicalValue]>,
-    output_mems: &'a mut Vec<Mem<[DynCanonicalValue]>>,
+    input_mem: Mem,
+    output_mems: &'a mut Vec<Mem>,
     output_stmts: &'a mut Vec<Stmt>,
-    element_type: TypeEnum,
+    element_type: CanonicalType,
     split: &'a mut MemSplit,
     mem_name_path: &'a mut String,
     split_state_stack: &'a mut SplitStateStack<'b>,
@@ -275,7 +303,7 @@ impl SplitMemState<'_, '_> {
         let outer_mem_name_path_len = self.mem_name_path.len();
         match self.split {
             MemSplit::Bundle { fields } => {
-                let TypeEnum::BundleType(bundle_type) = self.element_type else {
+                let CanonicalType::Bundle(bundle_type) = self.element_type else {
                     unreachable!();
                 };
                 for ((field, field_offset), split) in bundle_type
@@ -289,7 +317,9 @@ impl SplitMemState<'_, '_> {
                     self.mem_name_path.push_str(&field.name);
                     let field_ty_bit_width = field.ty.bit_width();
                     self.split_state_stack.push_map(
-                        |e: Expr<DynCanonicalValue>| e.with_type::<DynBundle>().field(&field.name),
+                        |e: Expr<CanonicalType>| {
+                            Expr::field(Expr::<Bundle>::from_canonical(e), &field.name)
+                        },
                         |initial_value_element| {
                             &initial_value_element[field_offset..][..field_ty_bit_width]
                         },
@@ -299,7 +329,7 @@ impl SplitMemState<'_, '_> {
                         input_mem: self.input_mem,
                         output_mems: self.output_mems,
                         output_stmts: self.output_stmts,
-                        element_type: field.ty.type_enum(),
+                        element_type: field.ty,
                         split,
                         mem_name_path: self.mem_name_path,
                         split_state_stack: self.split_state_stack,
@@ -328,7 +358,7 @@ impl SplitMemState<'_, '_> {
                     .zip(self.mem_state.replacement_ports.iter())
                 {
                     let port_expr = port.to_expr();
-                    let wire_expr = Expr::<DynBundle>::new_unchecked(*wire);
+                    let wire_expr = Expr::<Bundle>::from_canonical(wire.to_expr());
                     for name in [
                         Some("addr"),
                         Some("clk"),
@@ -340,8 +370,8 @@ impl SplitMemState<'_, '_> {
                         };
                         self.output_stmts.push(
                             StmtConnect {
-                                lhs: port_expr.field(name),
-                                rhs: wire_expr.field(name),
+                                lhs: Expr::field(port_expr, name),
+                                rhs: Expr::field(wire_expr, name),
                                 source_location: port.source_location(),
                             }
                             .into(),
@@ -352,18 +382,16 @@ impl SplitMemState<'_, '_> {
                 self.output_mems.push(new_mem);
             }
             MemSplit::Array { elements } => {
-                let TypeEnum::ArrayType(array_type) = self.element_type else {
+                let CanonicalType::Array(array_type) = self.element_type else {
                     unreachable!();
                 };
-                let element_type = array_type.element().type_enum();
-                let element_bit_width = array_type.element().bit_width();
+                let element_type = array_type.element();
+                let element_bit_width = element_type.bit_width();
                 for (index, split) in elements.make_mut_slice().iter_mut().enumerate() {
                     self.mem_name_path.truncate(outer_mem_name_path_len);
                     write!(self.mem_name_path, "_{index}").unwrap();
                     self.split_state_stack.push_map(
-                        |e: Expr<DynCanonicalValue>| {
-                            e.with_type::<Array<[DynCanonicalValue]>>()[index]
-                        },
+                        |e| Expr::<Array>::from_canonical(e)[index],
                         |initial_value_element| {
                             &initial_value_element[index * element_bit_width..][..element_bit_width]
                         },
@@ -388,7 +416,7 @@ impl SplitMemState<'_, '_> {
 }
 
 struct ModuleState {
-    output_module: Option<Interned<Module<DynBundle>>>,
+    output_module: Option<Interned<Module<Bundle>>>,
     name_id_gen: NameIdGen,
     memories: HashMap<ScopedNameId, MemState>,
 }
@@ -397,18 +425,18 @@ impl ModuleState {
     #[allow(clippy::too_many_arguments)]
     fn connect_split_mem_port_arrays(
         output_stmts: &mut Vec<Stmt>,
-        input_array_types: &[ArrayType<[DynCanonicalValue]>],
+        input_array_types: &[Array],
         memory_element_array_range_start: usize,
         memory_element_array_range_len: usize,
-        wire_rdata: Option<Expr<DynCanonicalValue>>,
-        wire_wdata: Option<Expr<DynCanonicalValue>>,
-        wire_wmask: Option<Expr<DynCanonicalValue>>,
-        port_rdata: Option<Expr<Array<[DynCanonicalValue]>>>,
-        port_wdata: Option<Expr<Array<[DynCanonicalValue]>>>,
-        port_wmask: Option<Expr<Array<[DynCanonicalValue]>>>,
-        connect_rdata: impl Copy + Fn(&mut Vec<Stmt>, Expr<DynCanonicalValue>, Expr<DynCanonicalValue>),
-        connect_wdata: impl Copy + Fn(&mut Vec<Stmt>, Expr<DynCanonicalValue>, Expr<DynCanonicalValue>),
-        connect_wmask: impl Copy + Fn(&mut Vec<Stmt>, Expr<DynCanonicalValue>, Expr<DynCanonicalValue>),
+        wire_rdata: Option<Expr<CanonicalType>>,
+        wire_wdata: Option<Expr<CanonicalType>>,
+        wire_wmask: Option<Expr<CanonicalType>>,
+        port_rdata: Option<Expr<Array>>,
+        port_wdata: Option<Expr<Array>>,
+        port_wmask: Option<Expr<Array>>,
+        connect_rdata: impl Copy + Fn(&mut Vec<Stmt>, Expr<CanonicalType>, Expr<CanonicalType>),
+        connect_wdata: impl Copy + Fn(&mut Vec<Stmt>, Expr<CanonicalType>, Expr<CanonicalType>),
+        connect_wmask: impl Copy + Fn(&mut Vec<Stmt>, Expr<CanonicalType>, Expr<CanonicalType>),
     ) {
         let Some((input_array_type, input_array_types_rest)) = input_array_types.split_first()
         else {
@@ -430,8 +458,7 @@ impl ModuleState {
         assert_eq!(memory_element_array_range_len % input_array_type.len(), 0);
         let chunk_size = memory_element_array_range_len / input_array_type.len();
         for index in 0..input_array_type.len() {
-            let map =
-                |e: Expr<DynCanonicalValue>| e.with_type::<Array<[DynCanonicalValue]>>()[index];
+            let map = |e| Expr::<Array>::from_canonical(e)[index];
             let wire_rdata = wire_rdata.map(map);
             let wire_wdata = wire_wdata.map(map);
             let wire_wmask = wire_wmask.map(map);
@@ -456,20 +483,20 @@ impl ModuleState {
     fn connect_split_mem_port(
         &mut self,
         output_stmts: &mut Vec<Stmt>,
-        mut input_element_type: TypeEnum,
+        mut input_element_type: CanonicalType,
         single_type: SingleType,
         source_location: SourceLocation,
-        wire_rdata: Option<Expr<DynCanonicalValue>>,
-        wire_wdata: Option<Expr<DynCanonicalValue>>,
-        wire_wmask: Option<Expr<DynCanonicalValue>>,
-        port_rdata: Option<Expr<DynCanonicalValue>>,
-        port_wdata: Option<Expr<DynCanonicalValue>>,
-        port_wmask: Option<Expr<DynCanonicalValue>>,
+        wire_rdata: Option<Expr<CanonicalType>>,
+        wire_wdata: Option<Expr<CanonicalType>>,
+        wire_wmask: Option<Expr<CanonicalType>>,
+        port_rdata: Option<Expr<CanonicalType>>,
+        port_wdata: Option<Expr<CanonicalType>>,
+        port_wmask: Option<Expr<CanonicalType>>,
     ) {
         let mut input_array_types = vec![];
         let connect_read = |output_stmts: &mut Vec<Stmt>,
-                            wire_read: Expr<DynCanonicalValue>,
-                            port_read: Expr<DynCanonicalValue>| {
+                            wire_read: Expr<CanonicalType>,
+                            port_read: Expr<CanonicalType>| {
             output_stmts.push(
                 StmtConnect {
                     lhs: wire_read,
@@ -480,8 +507,8 @@ impl ModuleState {
             );
         };
         let connect_write = |output_stmts: &mut Vec<Stmt>,
-                             wire_write: Expr<DynCanonicalValue>,
-                             port_write: Expr<DynCanonicalValue>| {
+                             wire_write: Expr<CanonicalType>,
+                             port_write: Expr<CanonicalType>| {
             output_stmts.push(
                 StmtConnect {
                     lhs: port_write,
@@ -491,32 +518,29 @@ impl ModuleState {
                 .into(),
             );
         };
-        let connect_read_enum =
-            |output_stmts: &mut Vec<Stmt>,
-             wire_read: Expr<DynCanonicalValue>,
-             port_read: Expr<DynCanonicalValue>| {
+        let connect_read_enum = |output_stmts: &mut Vec<Stmt>,
+                                 wire_read: Expr<CanonicalType>,
+                                 port_read: Expr<CanonicalType>| {
             connect_read(
                 output_stmts,
                 wire_read,
-                    port_read
-                        .with_type::<DynUInt>()
-                        .cast_bits_to(wire_read.ty()),
+                Expr::<UInt>::from_canonical(port_read).cast_bits_to(Expr::ty(wire_read)),
             );
         };
         let connect_write_enum =
             |output_stmts: &mut Vec<Stmt>,
-             wire_write: Expr<DynCanonicalValue>,
-             port_write: Expr<DynCanonicalValue>| {
+             wire_write: Expr<CanonicalType>,
+             port_write: Expr<CanonicalType>| {
                 connect_write(
                     output_stmts,
-                    wire_write.cast_to_bits().to_canonical_dyn(),
+                    Expr::canonical(wire_write.cast_to_bits()),
                     port_write,
                 );
             };
         loop {
             match input_element_type {
-                TypeEnum::BundleType(_) => unreachable!("bundle types are always split"),
-                TypeEnum::EnumType(_)
+                CanonicalType::Bundle(_) => unreachable!("bundle types are always split"),
+                CanonicalType::Enum(_)
                     if input_array_types
                         .first()
                         .map(|&v| single_type.is_array_type(v))
@@ -532,7 +556,7 @@ impl ModuleState {
                         connect_write(output_stmts, wire_wmask, port_wmask);
                     }
                 }
-                TypeEnum::EnumType(_) => Self::connect_split_mem_port_arrays(
+                CanonicalType::Enum(_) => Self::connect_split_mem_port_arrays(
                     output_stmts,
                     &input_array_types,
                     0,
@@ -540,25 +564,19 @@ impl ModuleState {
                     wire_rdata,
                     wire_wdata,
                     wire_wmask,
-                    port_rdata.map(|e: Expr<DynCanonicalValue>| {
-                        e.with_type::<Array<[DynCanonicalValue]>>()
-                    }),
-                    port_wdata.map(|e: Expr<DynCanonicalValue>| {
-                        e.with_type::<Array<[DynCanonicalValue]>>()
-                    }),
-                    port_wmask.map(|e: Expr<DynCanonicalValue>| {
-                        e.with_type::<Array<[DynCanonicalValue]>>()
-                    }),
+                    port_rdata.map(Expr::from_canonical),
+                    port_wdata.map(Expr::from_canonical),
+                    port_wmask.map(Expr::from_canonical),
                     connect_read_enum,
                     connect_write_enum,
                     connect_write_enum,
                 ),
-                TypeEnum::ArrayType(array_type) => {
+                CanonicalType::Array(array_type) => {
                     input_array_types.push(array_type);
-                    input_element_type = array_type.element().type_enum();
+                    input_element_type = array_type.element();
                     continue;
                 }
-                TypeEnum::UInt(_) | TypeEnum::SInt(_)
+                CanonicalType::UInt(_) | CanonicalType::SInt(_) | CanonicalType::Bool(_)
                     if input_array_types
                         .first()
                         .map(|&v| single_type.is_array_type(v))
@@ -574,7 +592,8 @@ impl ModuleState {
                         connect_write(output_stmts, wire_wmask, port_wmask);
                     }
                 }
-                TypeEnum::UInt(_) | TypeEnum::SInt(_) => Self::connect_split_mem_port_arrays(
+                CanonicalType::UInt(_) | CanonicalType::SInt(_) | CanonicalType::Bool(_) => {
+                    Self::connect_split_mem_port_arrays(
                         output_stmts,
                         &input_array_types,
                         0,
@@ -582,51 +601,47 @@ impl ModuleState {
                         wire_rdata,
                         wire_wdata,
                         wire_wmask,
-                    port_rdata.map(|e: Expr<DynCanonicalValue>| {
-                        e.with_type::<Array<[DynCanonicalValue]>>()
-                    }),
-                    port_wdata.map(|e: Expr<DynCanonicalValue>| {
-                        e.with_type::<Array<[DynCanonicalValue]>>()
-                    }),
-                    port_wmask.map(|e: Expr<DynCanonicalValue>| {
-                        e.with_type::<Array<[DynCanonicalValue]>>()
-                    }),
+                        port_rdata.map(Expr::from_canonical),
+                        port_wdata.map(Expr::from_canonical),
+                        port_wmask.map(Expr::from_canonical),
                         connect_read,
                         connect_write,
                         connect_write,
-                ),
-                TypeEnum::Clock(_)
-                | TypeEnum::AsyncReset(_)
-                | TypeEnum::SyncReset(_)
-                | TypeEnum::Reset(_) => unreachable!("memory element type is a storable type"),
+                    )
+                }
+                CanonicalType::Clock(_)
+                | CanonicalType::AsyncReset(_)
+                | CanonicalType::SyncReset(_)
+                | CanonicalType::Reset(_) => unreachable!("memory element type is a storable type"),
             }
             break;
         }
     }
     fn create_split_mem(
         &mut self,
-        input_mem: Mem<[DynCanonicalValue]>,
+        input_mem: Mem,
         output_stmts: &mut Vec<Stmt>,
-        input_element_type: TypeEnum,
+        input_element_type: CanonicalType,
         single_type: SingleType,
         mem_name_path: &str,
         split_state: &SplitState<'_>,
-    ) -> Mem<[DynCanonicalValue]> {
+    ) -> Mem {
         let mem_name = self.name_id_gen.gen(Intern::intern_owned(format!(
             "{}{mem_name_path}",
             input_mem.scoped_name().1 .0
         )));
         let mem_name = ScopedNameId(input_mem.scoped_name().0, mem_name);
         let output_element_type = match single_type {
-            SingleType::UInt(ty) => ty.canonical_dyn(),
-            SingleType::SInt(ty) => ty.canonical_dyn(),
-            SingleType::UIntArray(ty) => ty.canonical_dyn(),
-            SingleType::SIntArray(ty) => ty.canonical_dyn(),
+            SingleType::UInt(ty) => ty.canonical(),
+            SingleType::SInt(ty) => ty.canonical(),
+            SingleType::Bool(ty) => ty.canonical(),
+            SingleType::UIntArray(ty) => ty.canonical(),
+            SingleType::SIntArray(ty) => ty.canonical(),
+            SingleType::BoolArray(ty) => ty.canonical(),
         };
-        let output_array_type =
-            ArrayType::new_slice(output_element_type, input_mem.array_type().len());
+        let output_array_type = Array::new_dyn(output_element_type, input_mem.array_type().len());
         let initial_value = split_state.initial_value.as_ref().map(|initial_value| {
-            let mut bits = BitVec::with_capacity(output_array_type.bit_width());
+            let mut bits = BitVec::with_capacity(output_array_type.type_properties().bit_width);
             for element in initial_value.iter() {
                 bits.extend_from_bitslice(element);
             }
@@ -643,7 +658,6 @@ impl ModuleState {
                     port.addr_type(),
                     output_element_type,
                 )
-                .intern_sized()
             })
             .collect();
         let output_mem = Mem::new_unchecked(
@@ -676,15 +690,15 @@ impl ModuleState {
             let port_rdata = port
                 .port_kind()
                 .rdata_name()
-                .map(|name| port_expr.field(name));
+                .map(|name| Expr::field(port_expr, name));
             let port_wdata = port
                 .port_kind()
                 .wdata_name()
-                .map(|name| port_expr.field(name));
+                .map(|name| Expr::field(port_expr, name));
             let port_wmask = port
                 .port_kind()
                 .wmask_name()
-                .map(|name| port_expr.field(name));
+                .map(|name| Expr::field(port_expr, name));
             self.connect_split_mem_port(
                 output_stmts,
                 input_element_type,
@@ -702,11 +716,11 @@ impl ModuleState {
     }
     fn process_mem(
         &mut self,
-        input_mem: Mem<[DynCanonicalValue]>,
-        output_mems: &mut Vec<Mem<[DynCanonicalValue]>>,
+        input_mem: Mem,
+        output_mems: &mut Vec<Mem>,
         output_stmts: &mut Vec<Stmt>,
     ) {
-        let element_type = input_mem.array_type().element().type_enum();
+        let element_type = input_mem.array_type().element();
         let mut split = MemSplit::new(element_type);
         let mem_state = match split {
             MemSplit::Single {
@@ -748,7 +762,7 @@ impl ModuleState {
                         port_ty,
                     );
                     let wire_expr = wire.to_expr();
-                    let canonical_wire = wire.to_dyn_canonical_wire();
+                    let canonical_wire = wire.canonical();
                     output_stmts.push(
                         StmtWire {
                             annotations: Default::default(),
@@ -756,21 +770,21 @@ impl ModuleState {
                         }
                         .into(),
                     );
-                    replacement_ports.push(ExprEnum::Wire(canonical_wire.intern_sized()));
+                    replacement_ports.push(ExprEnum::Wire(canonical_wire));
                     wire_port_rdata.push(
                         port.port_kind()
                             .rdata_name()
-                            .map(|name| wire_expr.field(name)),
+                            .map(|name| Expr::field(wire_expr, name)),
                     );
                     wire_port_wdata.push(
                         port.port_kind()
                             .wdata_name()
-                            .map(|name| wire_expr.field(name)),
+                            .map(|name| Expr::field(wire_expr, name)),
                     );
                     wire_port_wmask.push(
                         port.port_kind()
                             .wmask_name()
-                            .map(|name| wire_expr.field(name)),
+                            .map(|name| Expr::field(wire_expr, name)),
                     );
                 }
                 let mem_state = MemState {
@@ -815,8 +829,8 @@ impl ModuleState {
 
 #[derive(Default)]
 struct State {
-    modules: HashMap<Interned<Module<DynBundle>>, ModuleState>,
-    current_module: Option<Interned<Module<DynBundle>>>,
+    modules: HashMap<Interned<Module<Bundle>>, ModuleState>,
+    current_module: Option<Interned<Module<Bundle>>>,
 }
 
 impl State {
@@ -828,11 +842,11 @@ impl State {
 
 struct PushedState<'a> {
     state: &'a mut State,
-    old_module: Option<Interned<Module<DynBundle>>>,
+    old_module: Option<Interned<Module<Bundle>>>,
 }
 
 impl<'a> PushedState<'a> {
-    fn push_module(state: &'a mut State, module: Interned<Module<DynBundle>>) -> Self {
+    fn push_module(state: &'a mut State, module: Interned<Module<Bundle>>) -> Self {
         let old_module = state.current_module.replace(module);
         Self { state, old_module }
     }
@@ -860,10 +874,7 @@ impl DerefMut for PushedState<'_> {
 impl Folder for State {
     type Error = Infallible;
 
-    fn fold_module<T: BundleValue>(&mut self, v: Module<T>) -> Result<Module<T>, Self::Error>
-    where
-        T::Type: BundleType<Value = T>,
-    {
+    fn fold_module<T: BundleType>(&mut self, v: Module<T>) -> Result<Module<T>, Self::Error> {
         let module: Interned<_> = v.canonical().intern_sized();
         if let Some(module_state) = self.modules.get(&module) {
             return Ok(Module::from_canonical(
@@ -886,10 +897,10 @@ impl Folder for State {
         Ok(Module::from_canonical(*module))
     }
 
-    fn fold_mem<VA: ValueArrayOrSlice + ?Sized>(
+    fn fold_mem<Element: Type, Len: Size>(
         &mut self,
-        _v: Mem<VA>,
-    ) -> Result<Mem<VA>, Self::Error> {
+        _v: Mem<Element, Len>,
+    ) -> Result<Mem<Element, Len>, Self::Error> {
         unreachable!()
     }
 
@@ -933,7 +944,7 @@ impl Folder for State {
     }
 }
 
-pub fn simplify_memories(module: Interned<Module<DynBundle>>) -> Interned<Module<DynBundle>> {
+pub fn simplify_memories(module: Interned<Module<Bundle>>) -> Interned<Module<Bundle>> {
     module
         .fold(&mut State::default())
         .unwrap_or_else(|v| match v {})

crates/fayalite/src/module/transform/visit.rs

@@ -3,18 +3,19 @@
 #![allow(clippy::multiple_bound_locations)]
 use crate::{
     annotations::{Annotation, CustomFirrtlAnnotation, TargetedAnnotation},
-    array::{Array, ArrayType, ArrayTypeTrait, ValueArrayOrSlice},
-    bundle::{BundleType, BundleValue, DynBundle, DynBundleType, FieldType},
-    clock::{Clock, ClockType},
-    enum_::{DynEnum, DynEnumType, EnumType, EnumValue, VariantType},
+    array::ArrayType,
+    bundle::{Bundle, BundleField, BundleType},
+    clock::Clock,
+    enum_::{Enum, EnumType, EnumVariant},
     expr::{
-        ops, Expr, ExprEnum, Literal, Target, TargetBase, TargetChild, TargetPathArrayElement,
-        TargetPathBundleField, TargetPathDynArrayElement, TargetPathElement, ToExpr,
+        ops,
+        target::{
+            Target, TargetBase, TargetChild, TargetPathArrayElement, TargetPathBundleField,
+            TargetPathDynArrayElement, TargetPathElement,
         },
-    int::{
-        DynInt, DynIntType, DynSInt, DynSIntType, DynUInt, DynUIntType, StaticOrDynIntType, IntType,
-        IntTypeTrait,
+        Expr, ExprEnum,
     },
+    int::{Bool, SIntType, SIntValue, Size, UIntType, UIntValue},
     intern::{Intern, Interned},
     memory::{Mem, MemPort, PortKind, PortName, PortType, ReadUnderWrite},
     module::{
@@ -24,10 +25,9 @@ use crate::{
         StmtMatch, StmtReg, StmtWire,
     },
     reg::Reg,
-    reset::{AsyncReset, AsyncResetType, Reset, ResetType, SyncReset, SyncResetType},
+    reset::{AsyncReset, Reset, SyncReset},
     source_location::SourceLocation,
-    ty::{DynCanonicalType, DynCanonicalValue, DynType, Type, TypeEnum, Value, ValueEnum},
-    util::{ConstBool, GenericConstBool},
+    ty::{CanonicalType, Type},
     wire::Wire,
 };
 use num_bigint::{BigInt, BigUint};
@@ -473,7 +473,4 @@ impl<T: ?Sized + Visit<State>, State: ?Sized + Visitor> Visit<State> for &'_ mut
     }
 }
 
-type InternedDynType = Interned<dyn DynType>;
-type InternedDynCanonicalType = Interned<dyn DynCanonicalType>;
-
 include!(concat!(env!("OUT_DIR"), "/visit.rs"));

crates/fayalite/src/prelude.rs

@@ -0,0 +1,22 @@
+pub use crate::{
+    annotations::Annotation,
+    array::{Array, ArrayType},
+    cli::Cli,
+    clock::{Clock, ClockDomain, ToClock},
+    enum_::{HdlNone, HdlOption, HdlSome},
+    expr::{CastBitsTo, CastTo, CastToBits, Expr, ReduceBits, ToExpr},
+    hdl, hdl_module,
+    int::{Bool, DynSize, IntCmp, KnownSize, SInt, SIntType, Size, UInt, UIntType},
+    memory::{Mem, MemBuilder, ReadUnderWrite},
+    module::{
+        annotate, connect, connect_any, instance, memory, memory_array, memory_with_init,
+        reg_builder, wire, Instance, Module, ModuleBuilder,
+    },
+    reg::Reg,
+    reset::{AsyncReset, Reset, SyncReset, ToAsyncReset, ToReset, ToSyncReset},
+    source_location::SourceLocation,
+    ty::{AsMask, CanonicalType, Type},
+    util::{ConstUsize, GenericConstUsize},
+    wire::Wire,
+    __,
+};

crates/fayalite/src/reg.rs

@@ -2,21 +2,21 @@
 // See Notices.txt for copyright information
 use crate::{
     clock::ClockDomain,
-    expr::{Expr, ExprTrait, Flow, ToExpr},
+    expr::{Expr, Flow},
     intern::Interned,
     module::{NameId, ScopedNameId},
     source_location::SourceLocation,
-    ty::{DynCanonicalType, DynType, Type},
+    ty::{CanonicalType, Type},
 };
 use std::fmt;
 
-#[derive(Clone, Eq, PartialEq, Hash)]
+#[derive(Copy, Clone, Eq, PartialEq, Hash)]
 pub struct Reg<T: Type> {
     name: ScopedNameId,
     source_location: SourceLocation,
     ty: T,
     clock_domain: Expr<ClockDomain>,
-    init: Option<Expr<T::Value>>,
+    init: Option<Expr<T>>,
 }
 
 impl<T: Type + fmt::Debug> fmt::Debug for Reg<T> {
@@ -37,20 +37,8 @@ impl<T: Type + fmt::Debug> fmt::Debug for Reg<T> {
     }
 }
 
-impl<T: Type> ToExpr for Reg<T> {
-    type Type = T;
-
-    fn ty(&self) -> Self::Type {
-        self.ty.clone()
-    }
-
-    fn to_expr(&self) -> Expr<<Self::Type as Type>::Value> {
-        Expr::new_unchecked(self.expr_enum())
-    }
-}
-
 impl<T: Type> Reg<T> {
-    pub fn canonical(&self) -> Reg<T::CanonicalType> {
+    pub fn canonical(&self) -> Reg<CanonicalType> {
         let Self {
             name,
             source_location,
@@ -66,49 +54,20 @@ impl<T: Type> Reg<T> {
             init: init.map(Expr::canonical),
         }
     }
-    pub fn to_dyn_reg(&self) -> Reg<Interned<dyn DynType>> {
-        let Self {
-            name,
-            source_location,
-            ref ty,
-            clock_domain,
-            init,
-        } = *self;
-        Reg {
-            name,
-            source_location,
-            ty: ty.to_dyn(),
-            clock_domain,
-            init: init.map(Expr::to_dyn),
-        }
-    }
-    pub fn to_dyn_canonical_reg(&self) -> Reg<Interned<dyn DynCanonicalType>> {
-        let Self {
-            name,
-            source_location,
-            ref ty,
-            clock_domain,
-            init,
-        } = *self;
-        Reg {
-            name,
-            source_location,
-            ty: ty.canonical_dyn(),
-            clock_domain,
-            init: init.map(Expr::to_canonical_dyn),
-        }
-    }
     #[track_caller]
     pub fn new_unchecked(
         scoped_name: ScopedNameId,
         source_location: SourceLocation,
         ty: T,
         clock_domain: Expr<ClockDomain>,
-        init: Option<Expr<T::Value>>,
+        init: Option<Expr<T>>,
     ) -> Self {
-        assert!(ty.is_storable(), "register type must be a storable type");
+        assert!(
+            ty.canonical().is_storable(),
+            "register type must be a storable type"
+        );
         if let Some(init) = init {
-            assert_eq!(ty, init.ty(), "register's type must match init type");
+            assert_eq!(ty, Expr::ty(init), "register's type must match init type");
         }
         Self {
             name: scoped_name,
@@ -118,6 +77,9 @@ impl<T: Type> Reg<T> {
             init,
         }
     }
+    pub fn ty(&self) -> T {
+        self.ty
+    }
     pub fn source_location(&self) -> SourceLocation {
         self.source_location
     }
@@ -139,7 +101,7 @@ impl<T: Type> Reg<T> {
     pub fn clock_domain(&self) -> Expr<ClockDomain> {
         self.clock_domain
     }
-    pub fn init(&self) -> Option<Expr<T::Value>> {
+    pub fn init(&self) -> Option<Expr<T>> {
         self.init
     }
     pub fn flow(&self) -> Flow {

crates/fayalite/src/reset.rs

@@ -2,358 +2,119 @@
 // See Notices.txt for copyright information
 use crate::{
     expr::{Expr, ToExpr},
-    int::{UInt, UIntType},
-    intern::Interned,
+    int::Bool,
     source_location::SourceLocation,
-    ty::{
-        impl_match_values_as_self, CanonicalType, CanonicalTypeKind, CanonicalValue, Connect,
-        DynCanonicalType, StaticType, Type, TypeEnum, Value, ValueEnum,
-    },
-    util::interned_bit,
+    ty::{impl_match_variant_as_self, CanonicalType, StaticType, Type, TypeProperties},
 };
-use bitvec::slice::BitSlice;
 
-pub trait ResetTypeTrait: CanonicalType + StaticType<MaskType = UIntType<1>> {}
-
-#[derive(Copy, Clone, Eq, PartialEq, Hash, Debug, Default)]
-pub struct AsyncResetType;
-
-impl AsyncResetType {
-    pub const fn new() -> Self {
-        Self
-    }
+mod sealed {
+    pub trait ResetTypeSealed {}
 }
 
-impl Type for AsyncResetType {
-    type Value = AsyncReset;
-    type CanonicalType = AsyncResetType;
-    type CanonicalValue = AsyncReset;
-    type MaskType = UIntType<1>;
-    type MaskValue = UInt<1>;
+pub trait ResetType: StaticType<MaskType = Bool> + sealed::ResetTypeSealed {}
 
-    impl_match_values_as_self!();
+macro_rules! reset_type {
+    ($name:ident, $Trait:ident::$trait_fn:ident, $is_castable_from_bits:literal) => {
+        #[derive(Copy, Clone, Eq, PartialEq, Hash, Debug, Default)]
+        pub struct $name;
+
+        impl Type for $name {
+            type BaseType = $name;
+            type MaskType = Bool;
+
+            impl_match_variant_as_self!();
 
             fn mask_type(&self) -> Self::MaskType {
-        UIntType::new()
+                Bool
             }
 
-    fn canonical(&self) -> Self::CanonicalType {
-        *self
+            fn canonical(&self) -> CanonicalType {
+                CanonicalType::$name(*self)
             }
 
-    fn source_location(&self) -> SourceLocation {
+            fn source_location() -> SourceLocation {
                 SourceLocation::builtin()
             }
 
-    fn type_enum(&self) -> TypeEnum {
-        TypeEnum::AsyncReset(*self)
+            fn from_canonical(canonical_type: CanonicalType) -> Self {
+                let CanonicalType::$name(retval) = canonical_type else {
+                    panic!("expected {}", stringify!($name));
+                };
+                retval
+            }
         }
 
-    fn from_canonical_type(t: Self::CanonicalType) -> Self {
-        t
+        impl $name {
+            pub fn type_properties(self) -> TypeProperties {
+                Self::TYPE_PROPERTIES
+            }
+            pub fn can_connect(self, _rhs: Self) -> bool {
+                true
+            }
         }
 
-    fn as_dyn_canonical_type_impl(this: &Self) -> Option<&dyn DynCanonicalType> {
-        Some(this)
-    }
-}
-
-impl Connect<Self> for AsyncResetType {}
-
-impl CanonicalType for AsyncResetType {
-    const CANONICAL_TYPE_KIND: CanonicalTypeKind = CanonicalTypeKind::AsyncReset;
-}
-
-impl StaticType for AsyncResetType {
-    fn static_type() -> Self {
-        Self
-    }
-}
-
-impl ResetTypeTrait for AsyncResetType {}
-
-#[derive(Copy, Clone, Eq, PartialEq, Hash, Debug)]
-pub struct AsyncReset(pub bool);
-
-impl ToExpr for AsyncReset {
-    type Type = AsyncResetType;
-
-    fn ty(&self) -> Self::Type {
-        AsyncResetType
+        impl StaticType for $name {
+            const TYPE: Self = Self;
+            const MASK_TYPE: Self::MaskType = Bool;
+            const TYPE_PROPERTIES: TypeProperties = TypeProperties {
+                is_passive: true,
+                is_storable: false,
+                is_castable_from_bits: $is_castable_from_bits,
+                bit_width: 1,
+            };
+            const MASK_TYPE_PROPERTIES: TypeProperties = Bool::TYPE_PROPERTIES;
         }
 
-    fn to_expr(&self) -> Expr<Self> {
-        Expr::from_value(self)
-    }
-}
+        impl sealed::ResetTypeSealed for $name {}
 
-impl Value for AsyncReset {
-    fn to_canonical(&self) -> <Self::Type as Type>::CanonicalValue {
-        *self
-    }
-    fn to_bits_impl(this: &Self) -> Interned<BitSlice> {
-        interned_bit(this.0)
-    }
-}
+        impl ResetType for $name {}
 
-impl CanonicalValue for AsyncReset {
-    fn value_enum_impl(this: &Self) -> ValueEnum {
-        ValueEnum::AsyncReset(*this)
-    }
-    fn to_bits_impl(this: &Self) -> Interned<BitSlice> {
-        interned_bit(this.0)
-    }
-}
-
-#[derive(Copy, Clone, Eq, PartialEq, Hash, Debug, Default)]
-pub struct SyncResetType;
-
-impl SyncResetType {
-    pub const fn new() -> Self {
-        Self
-    }
-}
-
-impl Type for SyncResetType {
-    type CanonicalType = SyncResetType;
-    type Value = SyncReset;
-    type CanonicalValue = SyncReset;
-    type MaskType = UIntType<1>;
-    type MaskValue = UInt<1>;
-
-    impl_match_values_as_self!();
-
-    fn mask_type(&self) -> Self::MaskType {
-        UIntType::new()
-    }
-
-    fn canonical(&self) -> Self::CanonicalType {
-        *self
-    }
-
-    fn source_location(&self) -> SourceLocation {
-        SourceLocation::builtin()
-    }
-
-    fn type_enum(&self) -> TypeEnum {
-        TypeEnum::SyncReset(*self)
-    }
-
-    fn from_canonical_type(t: Self::CanonicalType) -> Self {
-        t
-    }
-
-    fn as_dyn_canonical_type_impl(this: &Self) -> Option<&dyn DynCanonicalType> {
-        Some(this)
-    }
-}
-
-impl Connect<Self> for SyncResetType {}
-
-impl CanonicalType for SyncResetType {
-    const CANONICAL_TYPE_KIND: CanonicalTypeKind = CanonicalTypeKind::SyncReset;
-}
-
-impl StaticType for SyncResetType {
-    fn static_type() -> Self {
-        Self
-    }
-}
-
-impl ResetTypeTrait for SyncResetType {}
-
-#[derive(Copy, Clone, Eq, PartialEq, Hash, Debug, Default)]
-pub struct SyncReset(pub bool);
-
-impl ToExpr for SyncReset {
-    type Type = SyncResetType;
-
-    fn ty(&self) -> Self::Type {
-        SyncResetType
-    }
-
-    fn to_expr(&self) -> Expr<Self> {
-        Expr::from_value(self)
-    }
-}
-
-impl Value for SyncReset {
-    fn to_canonical(&self) -> <Self::Type as Type>::CanonicalValue {
-        *self
-    }
-    fn to_bits_impl(this: &Self) -> Interned<BitSlice> {
-        interned_bit(this.0)
-    }
-}
-
-impl CanonicalValue for SyncReset {
-    fn value_enum_impl(this: &Self) -> ValueEnum {
-        ValueEnum::SyncReset(*this)
-    }
-    fn to_bits_impl(this: &Self) -> Interned<BitSlice> {
-        interned_bit(this.0)
-    }
-}
-
-#[derive(Copy, Clone, Debug, Eq, PartialEq, Hash, Default)]
-pub struct ResetType;
-
-impl ResetType {
-    pub const fn new() -> Self {
-        Self
-    }
-}
-
-impl Type for ResetType {
-    type Value = Reset;
-    type CanonicalType = ResetType;
-    type CanonicalValue = Reset;
-    type MaskType = UIntType<1>;
-    type MaskValue = UInt<1>;
-
-    impl_match_values_as_self!();
-
-    fn mask_type(&self) -> Self::MaskType {
-        UIntType::new()
-    }
-
-    fn canonical(&self) -> Self::CanonicalType {
-        *self
-    }
-
-    fn source_location(&self) -> SourceLocation {
-        SourceLocation::builtin()
-    }
-
-    fn type_enum(&self) -> TypeEnum {
-        TypeEnum::Reset(*self)
-    }
-
-    fn from_canonical_type(t: Self::CanonicalType) -> Self {
-        t
-    }
-
-    fn as_dyn_canonical_type_impl(this: &Self) -> Option<&dyn DynCanonicalType> {
-        Some(this)
-    }
-}
-
-impl Connect<Self> for ResetType {}
-
-impl CanonicalType for ResetType {
-    const CANONICAL_TYPE_KIND: CanonicalTypeKind = CanonicalTypeKind::Reset;
-}
-
-impl StaticType for ResetType {
-    fn static_type() -> Self {
-        Self
-    }
-}
-
-impl ResetTypeTrait for ResetType {}
-
-#[derive(Copy, Clone, Debug, Eq, PartialEq, Hash)]
-pub enum Reset {}
-
-impl ToExpr for Reset {
-    type Type = ResetType;
-
-    fn ty(&self) -> Self::Type {
-        match *self {}
-    }
-
-    fn to_expr(&self) -> Expr<Self> {
-        Expr::from_value(self)
-    }
-}
-
-impl Value for Reset {
-    fn to_canonical(&self) -> <Self::Type as Type>::CanonicalValue {
-        *self
-    }
-    fn to_bits_impl(this: &Self) -> Interned<BitSlice> {
-        match *this {}
-    }
-}
-
-impl CanonicalValue for Reset {
-    fn value_enum_impl(this: &Self) -> ValueEnum {
-        ValueEnum::Reset(*this)
-    }
-    fn to_bits_impl(this: &Self) -> Interned<BitSlice> {
-        match *this {}
-    }
-}
-
-macro_rules! make_to_reset {
-    (
-        $(#[from_value($from_value_ty:ty)])*
-        $vis:vis trait $Trait:ident {
-            fn $fn:ident(&self) -> Expr<$T:ty>;
-        }
-    ) => {
-        $vis trait $Trait {
-            fn $fn(&self) -> Expr<$T>;
+        pub trait $Trait {
+            fn $trait_fn(&self) -> Expr<$name>;
         }
 
         impl<T: ?Sized + $Trait> $Trait for &'_ T {
-            fn $fn(&self) -> Expr<$T> {
-                (**self).$fn()
+            fn $trait_fn(&self) -> Expr<$name> {
+                (**self).$trait_fn()
             }
         }
 
         impl<T: ?Sized + $Trait> $Trait for &'_ mut T {
-            fn $fn(&self) -> Expr<$T> {
-                (**self).$fn()
+            fn $trait_fn(&self) -> Expr<$name> {
+                (**self).$trait_fn()
             }
         }
 
         impl<T: ?Sized + $Trait> $Trait for Box<T> {
-            fn $fn(&self) -> Expr<$T> {
-                (**self).$fn()
+            fn $trait_fn(&self) -> Expr<$name> {
+                (**self).$trait_fn()
             }
         }
 
-        impl $Trait for Expr<$T> {
-            fn $fn(&self) -> Expr<$T> {
+        impl $Trait for Expr<$name> {
+            fn $trait_fn(&self) -> Expr<$name> {
                 *self
             }
         }
-
-        impl $Trait for $T {
-            fn $fn(&self) -> Expr<$T> {
-                self.to_expr()
-            }
-        }
-
-        $(impl $Trait for $from_value_ty {
-            fn $fn(&self) -> Expr<$T> {
-                self.to_expr().$fn()
-            }
-        })*
     };
 }
 
-make_to_reset! {
-    #[from_value(SyncReset)]
-    #[from_value(AsyncReset)]
-    pub trait ToReset {
-        fn to_reset(&self) -> Expr<Reset>;
+reset_type!(AsyncReset, ToAsyncReset::to_async_reset, true);
+reset_type!(SyncReset, ToSyncReset::to_sync_reset, true);
+reset_type!(
+    Reset,
+    ToReset::to_reset,
+    false // Reset is not castable from bits because we don't know if it's async or sync
+);
+
+impl ToSyncReset for bool {
+    fn to_sync_reset(&self) -> Expr<SyncReset> {
+        self.to_expr().to_sync_reset()
     }
 }
 
-make_to_reset! {
-    #[from_value(bool)]
-    #[from_value(UInt<1>)]
-    pub trait ToAsyncReset {
-        fn to_async_reset(&self) -> Expr<AsyncReset>;
-    }
-}
-
-make_to_reset! {
-    #[from_value(bool)]
-    #[from_value(UInt<1>)]
-    pub trait ToSyncReset {
-        fn to_sync_reset(&self) -> Expr<SyncReset>;
+impl ToAsyncReset for bool {
+    fn to_async_reset(&self) -> Expr<AsyncReset> {
+        self.to_expr().to_async_reset()
     }
 }

crates/fayalite/src/util.rs

@@ -3,10 +3,14 @@
 
 mod const_bool;
 mod const_cmp;
+mod const_usize;
 mod misc;
+mod scoped_ref;
 
 #[doc(inline)]
 pub use const_bool::{ConstBool, ConstBoolDispatch, ConstBoolDispatchTag, GenericConstBool};
+#[doc(inline)]
+pub use const_usize::{ConstUsize, GenericConstUsize};
 
 #[doc(inline)]
 pub use const_cmp::{
@@ -14,6 +18,9 @@ pub use const_cmp::{
     const_usize_cmp,
 };
 
+#[doc(inline)]
+pub use scoped_ref::ScopedRef;
+
 #[doc(inline)]
 pub use misc::{
     interned_bit, iter_eq_by, BitSliceWriteWithBase, DebugAsDisplay, DebugAsRawString, MakeMutSlice,

crates/fayalite/src/util/const_usize.rs

@@ -0,0 +1,29 @@
+// SPDX-License-Identifier: LGPL-3.0-or-later
+// See Notices.txt for copyright information
+use std::{fmt::Debug, hash::Hash};
+
+mod sealed {
+    pub trait Sealed {}
+}
+
+/// the only implementation is `ConstUsize<Self::VALUE>`
+pub trait GenericConstUsize:
+    sealed::Sealed + Copy + Ord + Hash + Default + Debug + 'static + Send + Sync
+{
+    const VALUE: usize;
+}
+
+#[derive(Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Hash, Default)]
+pub struct ConstUsize<const VALUE: usize>;
+
+impl<const VALUE: usize> Debug for ConstUsize<VALUE> {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        f.debug_tuple("ConstUsize").field(&Self::VALUE).finish()
+    }
+}
+
+impl<const VALUE: usize> sealed::Sealed for ConstUsize<VALUE> {}
+
+impl<const VALUE: usize> GenericConstUsize for ConstUsize<VALUE> {
+    const VALUE: usize = VALUE;
+}

crates/fayalite/src/util/scoped_ref.rs

@@ -0,0 +1,106 @@
+mod safety_boundary {
+    use std::{cell::Cell, ptr::NonNull};
+
+    pub(super) struct Impl<T: ?Sized>(Cell<Option<NonNull<T>>>);
+
+    impl<T: ?Sized> Impl<T> {
+        #[inline]
+        pub(super) const fn new() -> Self {
+            Self(Cell::new(None))
+        }
+        #[inline]
+        pub(super) const fn opt_static_ref(v: Option<&'static T>) -> Self {
+            Self(Cell::new(if let Some(v) = v {
+                // SAFETY: v is a valid reference for lifetime 'static
+                unsafe { Some(NonNull::new_unchecked(v as *const T as *mut T)) }
+            } else {
+                None
+            }))
+        }
+        /// set `self` to `value` for the duration of the `f()` call.
+        #[inline]
+        pub(super) fn set_opt<F: FnOnce() -> R, R>(&self, value: Option<&T>, f: F) -> R {
+            struct ResetOnDrop<'a, T: ?Sized> {
+                this: &'a Impl<T>,
+                old: Option<NonNull<T>>,
+            }
+            impl<T: ?Sized> Drop for ResetOnDrop<'_, T> {
+                fn drop(&mut self) {
+                    self.this.0.set(self.old);
+                }
+            }
+            // reset to old value before exiting this function ensuring `self`
+            // is not set to `value` when its lifetime is expired
+            let _reset_on_drop = ResetOnDrop {
+                this: self,
+                old: self.0.replace(value.map(NonNull::from)),
+            };
+            f()
+        }
+        #[inline]
+        pub(super) fn get_ptr(&self) -> Option<NonNull<T>> {
+            self.0.get()
+        }
+        /// get the reference in `self` for the duration of the `f(...)` call.
+        #[inline]
+        pub(super) fn with_opt<F: for<'a> FnOnce(Option<&'a T>) -> R, R>(&self, f: F) -> R {
+            // SAFETY:
+            // `self.0` is only `Some` when inside some `set_opt` call or when set
+            // to some `&'static T`, which ensures that the pointer is live and valid.
+            //
+            // the reference we give away has its lifetime scoped to this
+            // function call which ensures that it won't escape
+            unsafe { f(self.0.get().map(|v| &*v.as_ptr())) }
+        }
+    }
+}
+
+/// holds a `Cell<Option<&'scoped T>>` where `'scoped` is erased. This is useful for holding references in TLS.
+pub struct ScopedRef<T: ?Sized>(safety_boundary::Impl<T>);
+
+impl<T: ?Sized> ScopedRef<T> {
+    /// create a new empty [`ScopedRef`]
+    #[inline]
+    pub const fn new() -> Self {
+        Self(safety_boundary::Impl::new())
+    }
+    #[inline]
+    pub const fn opt_static_ref(v: Option<&'static T>) -> Self {
+        Self(safety_boundary::Impl::opt_static_ref(v))
+    }
+    #[inline]
+    pub const fn static_ref(v: &'static T) -> Self {
+        Self::opt_static_ref(Some(v))
+    }
+    /// set `self` to `value` for the duration of the `f()` call.
+    #[inline]
+    pub fn set_opt<F: FnOnce() -> R, R>(&self, value: Option<&T>, f: F) -> R {
+        self.0.set_opt(value, f)
+    }
+    /// set `self` to `value` for the duration of the `f()` call.
+    #[inline]
+    pub fn set<F: FnOnce() -> R, R>(&self, value: &T, f: F) -> R {
+        self.0.set_opt(Some(value), f)
+    }
+    #[inline]
+    pub fn is_some(&self) -> bool {
+        self.0.get_ptr().is_some()
+    }
+    #[inline]
+    pub fn is_none(&self) -> bool {
+        self.0.get_ptr().is_none()
+    }
+    /// get the reference in `self` for the duration of the `f(...)` call. panics if no reference is set.
+    #[inline]
+    pub fn with<F: FnOnce(&T) -> R, R>(&self, f: F) -> R {
+        self.0.with_opt(
+            #[inline]
+            |v| f(v.expect("called ScopedRef::with on an empty ScopedRef")),
+        )
+    }
+    /// get the reference in `self` for the duration of the `f(...)` call.
+    #[inline]
+    pub fn with_opt<F: FnOnce(Option<&T>) -> R, R>(&self, f: F) -> R {
+        self.0.with_opt(f)
+    }
+}

crates/fayalite/src/wire.rs

@@ -1,15 +1,15 @@
 // SPDX-License-Identifier: LGPL-3.0-or-later
 // See Notices.txt for copyright information
 use crate::{
-    expr::{Expr, ExprTrait, Flow, ToExpr},
+    expr::Flow,
     intern::Interned,
     module::{NameId, ScopedNameId},
     source_location::SourceLocation,
-    ty::{DynCanonicalType, DynType, Type},
+    ty::{CanonicalType, Type},
 };
 use std::fmt;
 
-#[derive(Clone, Eq, PartialEq, Hash)]
+#[derive(Copy, Clone, Eq, PartialEq, Hash)]
 pub struct Wire<T: Type> {
     name: ScopedNameId,
     source_location: SourceLocation,
@@ -18,27 +18,14 @@ pub struct Wire<T: Type> {
 
 impl<T: Type + fmt::Debug> fmt::Debug for Wire<T> {
     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-        f.debug_struct("Wire")
-            .field("name", &self.name)
-            .field("ty", &self.ty)
-            .finish_non_exhaustive()
-    }
-}
-
-impl<T: Type> ToExpr for Wire<T> {
-    type Type = T;
-
-    fn ty(&self) -> Self::Type {
-        self.ty.clone()
-    }
-
-    fn to_expr(&self) -> Expr<<Self::Type as Type>::Value> {
-        Expr::new_unchecked(self.expr_enum())
+        write!(f, "Wire({:?}: ", self.name)?;
+        self.ty.fmt(f)?;
+        f.write_str(")")
     }
 }
 
 impl<T: Type> Wire<T> {
-    pub fn canonical(&self) -> Wire<T::CanonicalType> {
+    pub fn canonical(&self) -> Wire<CanonicalType> {
         let Self {
             name,
             source_location,
@@ -50,29 +37,8 @@ impl<T: Type> Wire<T> {
             ty: ty.canonical(),
         }
     }
-    pub fn to_dyn_wire(&self) -> Wire<Interned<dyn DynType>> {
-        let Self {
-            name,
-            source_location,
-            ref ty,
-        } = *self;
-        Wire {
-            name,
-            source_location,
-            ty: ty.to_dyn(),
-        }
-    }
-    pub fn to_dyn_canonical_wire(&self) -> Wire<Interned<dyn DynCanonicalType>> {
-        let Self {
-            name,
-            source_location,
-            ref ty,
-        } = *self;
-        Wire {
-            name,
-            source_location,
-            ty: ty.canonical_dyn(),
-        }
+    pub fn ty(&self) -> T {
+        self.ty
     }
     pub fn new_unchecked(
         scoped_name: ScopedNameId,

crates/fayalite/tests/hdl_types.rs

@@ -0,0 +1,26 @@
+// SPDX-License-Identifier: LGPL-3.0-or-later
+// See Notices.txt for copyright information
+use fayalite::{
+    array::ArrayType,
+    hdl,
+    int::{IntType, Size, UInt},
+};
+
+#[hdl(outline_generated)]
+pub struct S<T: IntType, Len: Size> {
+    pub a: T,
+    b: UInt<3>,
+    pub(crate) c: ArrayType<UInt<1>, Len>,
+}
+
+#[hdl(outline_generated)]
+pub enum E<T> {
+    A,
+    B(UInt<3>),
+    C(T),
+}
+
+#[hdl(outline_generated)]
+pub struct S2<T = ()> {
+    pub v: E<T>,
+}

crates/fayalite/tests/ui/hdl_types.rs

@@ -1,8 +1,8 @@
 // SPDX-License-Identifier: LGPL-3.0-or-later
 // See Notices.txt for copyright information
-use fayalite::ty::Value;
+use fayalite::hdl;
 
-#[derive(Value)]
+#[hdl]
 union U {
     a: (),
 }

crates/fayalite/tests/ui/hdl_types.stderr

@@ -0,0 +1,7 @@
+error: top-level #[hdl] can only be used on structs or enums
+ --> tests/ui/hdl_types.rs:5:1
+  |
+5 | #[hdl]
+  | ^^^^^^
+  |
+  = note: this error originates in the attribute macro `hdl` (in Nightly builds, run with -Z macro-backtrace for more info)

crates/fayalite/tests/ui/value_derive.stderr

@@ -1,7 +0,0 @@
-error: derive(Value) can only be used on structs or enums
- --> tests/ui/value_derive.rs:5:10
-  |
-5 | #[derive(Value)]
-  |          ^^^^^
-  |
-  = note: this error originates in the derive macro `Value` (in Nightly builds, run with -Z macro-backtrace for more info)

crates/fayalite/tests/value_derive.rs

@@ -1,32 +0,0 @@
-// SPDX-License-Identifier: LGPL-3.0-or-later
-// See Notices.txt for copyright information
-use fayalite::{
-    int::UInt,
-    ty::{StaticValue, Value},
-};
-
-#[derive(Value, Clone, Hash, PartialEq, Eq, Debug)]
-#[hdl(outline_generated)]
-pub struct S<T> {
-    pub a: T,
-    b: UInt<3>,
-}
-
-#[derive(Value, Clone, Hash, PartialEq, Eq, Debug)]
-#[hdl(outline_generated)]
-pub enum E<T> {
-    A,
-    B {},
-    C(),
-    D(UInt<3>),
-    E { a: UInt<3> },
-    F(UInt<3>, UInt<3>),
-    G(T),
-    H(T, UInt<1>),
-}
-
-#[derive(Value, Clone, Hash, PartialEq, Eq, Debug)]
-#[hdl(outline_generated, static, where(T: StaticValue))]
-pub struct S2<T> {
-    pub v: E<T>,
-}