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Jacob Lifshay 2024-06-10 23:09:13 -07:00
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# SPDX-License-Identifier: LGPL-3.0-or-later
# See Notices.txt for copyright information
[workspace]
resolver = "2"
members = ["crates/*"]

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### GNU LESSER GENERAL PUBLIC LICENSE
Version 3, 29 June 2007
Copyright (C) 2007 Free Software Foundation, Inc.
<https://fsf.org/>
Everyone is permitted to copy and distribute verbatim copies of this
license document, but changing it is not allowed.
This version of the GNU Lesser General Public License incorporates the
terms and conditions of version 3 of the GNU General Public License,
supplemented by the additional permissions listed below.
#### 0. Additional Definitions.
As used herein, "this License" refers to version 3 of the GNU Lesser
General Public License, and the "GNU GPL" refers to version 3 of the
GNU General Public License.
"The Library" refers to a covered work governed by this License, other
than an Application or a Combined Work as defined below.
An "Application" is any work that makes use of an interface provided
by the Library, but which is not otherwise based on the Library.
Defining a subclass of a class defined by the Library is deemed a mode
of using an interface provided by the Library.
A "Combined Work" is a work produced by combining or linking an
Application with the Library. The particular version of the Library
with which the Combined Work was made is also called the "Linked
Version".
The "Minimal Corresponding Source" for a Combined Work means the
Corresponding Source for the Combined Work, excluding any source code
for portions of the Combined Work that, considered in isolation, are
based on the Application, and not on the Linked Version.
The "Corresponding Application Code" for a Combined Work means the
object code and/or source code for the Application, including any data
and utility programs needed for reproducing the Combined Work from the
Application, but excluding the System Libraries of the Combined Work.
#### 1. Exception to Section 3 of the GNU GPL.
You may convey a covered work under sections 3 and 4 of this License
without being bound by section 3 of the GNU GPL.
#### 2. Conveying Modified Versions.
If you modify a copy of the Library, and, in your modifications, a
facility refers to a function or data to be supplied by an Application
that uses the facility (other than as an argument passed when the
facility is invoked), then you may convey a copy of the modified
version:
- a) under this License, provided that you make a good faith effort
to ensure that, in the event an Application does not supply the
function or data, the facility still operates, and performs
whatever part of its purpose remains meaningful, or
- b) under the GNU GPL, with none of the additional permissions of
this License applicable to that copy.
#### 3. Object Code Incorporating Material from Library Header Files.
The object code form of an Application may incorporate material from a
header file that is part of the Library. You may convey such object
code under terms of your choice, provided that, if the incorporated
material is not limited to numerical parameters, data structure
layouts and accessors, or small macros, inline functions and templates
(ten or fewer lines in length), you do both of the following:
- a) Give prominent notice with each copy of the object code that
the Library is used in it and that the Library and its use are
covered by this License.
- b) Accompany the object code with a copy of the GNU GPL and this
license document.
#### 4. Combined Works.
You may convey a Combined Work under terms of your choice that, taken
together, effectively do not restrict modification of the portions of
the Library contained in the Combined Work and reverse engineering for
debugging such modifications, if you also do each of the following:
- a) Give prominent notice with each copy of the Combined Work that
the Library is used in it and that the Library and its use are
covered by this License.
- b) Accompany the Combined Work with a copy of the GNU GPL and this
license document.
- c) For a Combined Work that displays copyright notices during
execution, include the copyright notice for the Library among
these notices, as well as a reference directing the user to the
copies of the GNU GPL and this license document.
- d) Do one of the following:
- 0) Convey the Minimal Corresponding Source under the terms of
this License, and the Corresponding Application Code in a form
suitable for, and under terms that permit, the user to
recombine or relink the Application with a modified version of
the Linked Version to produce a modified Combined Work, in the
manner specified by section 6 of the GNU GPL for conveying
Corresponding Source.
- 1) Use a suitable shared library mechanism for linking with
the Library. A suitable mechanism is one that (a) uses at run
time a copy of the Library already present on the user's
computer system, and (b) will operate properly with a modified
version of the Library that is interface-compatible with the
Linked Version.
- e) Provide Installation Information, but only if you would
otherwise be required to provide such information under section 6
of the GNU GPL, and only to the extent that such information is
necessary to install and execute a modified version of the
Combined Work produced by recombining or relinking the Application
with a modified version of the Linked Version. (If you use option
4d0, the Installation Information must accompany the Minimal
Corresponding Source and Corresponding Application Code. If you
use option 4d1, you must provide the Installation Information in
the manner specified by section 6 of the GNU GPL for conveying
Corresponding Source.)
#### 5. Combined Libraries.
You may place library facilities that are a work based on the Library
side by side in a single library together with other library
facilities that are not Applications and are not covered by this
License, and convey such a combined library under terms of your
choice, if you do both of the following:
- a) Accompany the combined library with a copy of the same work
based on the Library, uncombined with any other library
facilities, conveyed under the terms of this License.
- b) Give prominent notice with the combined library that part of it
is a work based on the Library, and explaining where to find the
accompanying uncombined form of the same work.
#### 6. Revised Versions of the GNU Lesser General Public License.
The Free Software Foundation may publish revised and/or new versions
of the GNU Lesser General Public License from time to time. Such new
versions will be similar in spirit to the present version, but may
differ in detail to address new problems or concerns.
Each version is given a distinguishing version number. If the Library
as you received it specifies that a certain numbered version of the
GNU Lesser General Public License "or any later version" applies to
it, you have the option of following the terms and conditions either
of that published version or of any later version published by the
Free Software Foundation. If the Library as you received it does not
specify a version number of the GNU Lesser General Public License, you
may choose any version of the GNU Lesser General Public License ever
published by the Free Software Foundation.
If the Library as you received it specifies that a proxy can decide
whether future versions of the GNU Lesser General Public License shall
apply, that proxy's public statement of acceptance of any version is
permanent authorization for you to choose that version for the
Library.

16
Notices.txt Normal file
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@ -0,0 +1,16 @@
Copyright 2024 Jacob Lifshay
This file is part of Fayalite.
Fayalite is free software: you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
Fayalite is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with Fayalite. If not, see <https://www.gnu.org/licenses/>.

18
crates/fayalite-proc-macros-impl/Cargo.toml Normal file
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# SPDX-License-Identifier: LGPL-3.0-or-later
# See Notices.txt for copyright information
[package]
name = "fayalite-proc-macros-impl"
version = "0.1.0"
edition = "2021"
workspace = "../.."
license = "LGPL-3.0-or-later"
[dependencies]
base16ct = "0.2.0"
num-bigint = "0.4.4"
prettyplease = "0.2.20"
proc-macro2 = "1.0.78"
quote = "1.0.35"
sha2 = "0.10.8"
syn = { version = "2.0.53", features = ["full", "fold", "visit", "extra-traits"] }
tempfile = "3.10.1"

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crates/fayalite-proc-macros-impl/build.rs Normal file
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// SPDX-License-Identifier: LGPL-3.0-or-later
// See Notices.txt for copyright information
// build.rs to make cargo set env!("OUT_DIR")
fn main() {}

248
crates/fayalite-proc-macros-impl/src/fold.rs Normal file
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// SPDX-License-Identifier: LGPL-3.0-or-later
// See Notices.txt for copyright information
pub(crate) trait DoFold<State: ?Sized + syn::fold::Fold> {
fn do_fold(self, state: &mut State) -> Self;
}
impl<T: DoFold<State>, State: ?Sized + syn::fold::Fold> DoFold<State> for Box<T> {
fn do_fold(mut self, state: &mut State) -> Self {
*self = T::do_fold(*self, state);
self
}
}
impl<T: DoFold<State>, State: ?Sized + syn::fold::Fold> DoFold<State> for Option<T> {
fn do_fold(self, state: &mut State) -> Self {
self.map(|v| T::do_fold(v, state))
}
}
impl<T: DoFold<State>, State: ?Sized + syn::fold::Fold> DoFold<State> for Vec<T> {
fn do_fold(self, state: &mut State) -> Self {
Vec::from_iter(self.into_iter().map(|v| T::do_fold(v, state)))
}
}
impl<T: DoFold<State>, P: DoFold<State>, State: ?Sized + syn::fold::Fold> DoFold<State>
for Punctuated<T, P>
{
fn do_fold(self, state: &mut State) -> Self {
Punctuated::from_iter(self.into_pairs().map(|v| {
let (v, p) = v.into_tuple().do_fold(state);
Pair::new(v, p)
}))
}
}
macro_rules! impl_fold_tuple {
($($var0:ident: $T0:ident, $($var:ident: $T:ident,)*)?) => {
$(impl_fold_tuple!($($var: $T,)*);)?
impl_fold_tuple!(@impl $($var0: $T0, $($var: $T,)*)?);
};
(@impl $($var:ident: $T:ident,)*) => {
impl<State: ?Sized + syn::fold::Fold, $($T: DoFold<State>,)*> DoFold<State> for ($($T,)*) {
#[allow(clippy::unused_unit)]
fn do_fold(self, state: &mut State) -> Self {
let _ = state;
let ($($var,)*) = self;
$(let $var = $var.do_fold(state);)*
($($var,)*)
}
}
};
}
impl_fold_tuple!(
v0: T0,
v1: T1,
v2: T2,
v3: T3,
v4: T4,
v5: T5,
v6: T6,
v7: T7,
v8: T8,
v9: T9,
v10: T10,
v11: T11,
);
macro_rules! no_op_fold {
($ty:ty) => {
impl<State: ?Sized + syn::fold::Fold> $crate::fold::DoFold<State> for $ty {
fn do_fold(self, _state: &mut State) -> Self {
self
}
}
};
}
pub(crate) use no_op_fold;
macro_rules! impl_fold {
(
struct $Struct:ident<$($T:ident,)*> $(where ($($where:tt)*))? {
$($field:ident: $field_ty:ty,)*
}
) => {
impl<State: ?Sized + syn::fold::Fold, $($T,)*> $crate::fold::DoFold<State> for $Struct<$($T,)*>
where
$($T: $crate::fold::DoFold<State>,)*
$($where)*
{
fn do_fold(self, state: &mut State) -> Self {
let _ = state;
let Self {
$($field,)*
} = self;
Self {
$($field: <$field_ty as $crate::fold::DoFold<State>>::do_fold($field, state),)*
}
}
}
};
(
struct $Struct:ident<$($T:ident,)*>(
$field0_ty:ty $(,)?
)
$(where ($($where:tt)*))?;
) => {
impl<State: ?Sized + syn::fold::Fold, $($T,)*> $crate::fold::DoFold<State> for $Struct<$($T,)*>
where
$($T: $crate::fold::DoFold<State>,)*
$($where)*
{
fn do_fold(self, state: &mut State) -> Self {
let _ = state;
let Self(
v0,
) = self;
Self(
<$field0_ty as $crate::fold::DoFold<State>>::do_fold(v0, state),
)
}
}
};
(
enum $Enum:ident<$($T:ident,)*> $(where ($($where:tt)*))? {
$($Variant:ident $({
$($brace_field:ident: $brace_field_ty:ty,)*
})?
$((
$($paren_field_ty:ty),* $(,)?
))?,)*
}
) => {
impl<State: ?Sized + syn::fold::Fold, $($T,)*> $crate::fold::DoFold<State> for $Enum<$($T,)*>
where
$($T: $crate::fold::DoFold<State>,)*
$($where)*
{
fn do_fold(self, state: &mut State) -> Self {
let _ = state;
$crate::fold::impl_fold! {
@enum_variants self, state => ()
$($Variant $({
$($brace_field: $brace_field_ty,)*
})?
$((
$($paren_field_ty,)*
))?,)*
}
}
}
};
(
@enum_variants $self:expr, $state:expr => ($($generated_arms:tt)*)
) => {
match $self {
$($generated_arms)*
}
};
(
@enum_variants $self:expr, $state:expr => ($($generated_arms:tt)*)
$Variant:ident {
$($field:tt: $field_ty:ty,)*
},
$($rest:tt)*
) => {
$crate::fold::impl_fold! {
@enum_variants $self, $state => (
$($generated_arms)*
Self::$Variant {
$($field,)*
} => Self::$Variant {
$($field: <$field_ty as $crate::fold::DoFold<State>>::do_fold($field, $state),)*
},
)
$($rest)*
}
};
(
@enum_variants $self:expr, $state:expr => ($($generated_arms:tt)*)
$Variant:ident(
$field0_ty:ty $(,)?
),
$($rest:tt)*
) => {
$crate::fold::impl_fold! {
@enum_variants $self, $state => (
$($generated_arms)*
Self::$Variant(v0) => Self::$Variant(
<$field0_ty as $crate::fold::DoFold<State>>::do_fold(v0, $state),
),
)
$($rest)*
}
};
}
pub(crate) use impl_fold;
use syn::punctuated::{Pair, Punctuated};
macro_rules! forward_fold {
($ty:ty => $fn:ident) => {
impl<State: syn::fold::Fold + ?Sized> DoFold<State> for $ty {
fn do_fold(self, state: &mut State) -> Self {
<State as syn::fold::Fold>::$fn(state, self)
}
}
};
}
forward_fold!(syn::Attribute => fold_attribute);
forward_fold!(syn::AttrStyle => fold_attr_style);
forward_fold!(syn::Expr => fold_expr);
forward_fold!(syn::ExprArray => fold_expr_array);
forward_fold!(syn::ExprCall => fold_expr_call);
forward_fold!(syn::ExprIf => fold_expr_if);
forward_fold!(syn::ExprMatch => fold_expr_match);
forward_fold!(syn::ExprPath => fold_expr_path);
forward_fold!(syn::ExprStruct => fold_expr_struct);
forward_fold!(syn::ExprTuple => fold_expr_tuple);
forward_fold!(syn::Ident => fold_ident);
forward_fold!(syn::Member => fold_member);
forward_fold!(syn::Path => fold_path);
forward_fold!(syn::Type => fold_type);
forward_fold!(syn::TypePath => fold_type_path);
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::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![enum]);
no_op_fold!(syn::Token![extern]);
no_op_fold!(syn::Token![let]);
no_op_fold!(syn::Token![mut]);
no_op_fold!(syn::Token![struct]);
no_op_fold!(syn::Token![where]);

624
crates/fayalite-proc-macros-impl/src/lib.rs Normal file
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@ -0,0 +1,624 @@
// SPDX-License-Identifier: LGPL-3.0-or-later
// See Notices.txt for copyright information
#![cfg_attr(test, recursion_limit = "512")]
use proc_macro2::{Span, TokenStream};
use quote::{quote, ToTokens};
use std::io::{ErrorKind, Write};
use syn::{
bracketed, parenthesized,
parse::{Parse, ParseStream, Parser},
parse_quote, AttrStyle, Attribute, Error, Item, Token,
};
mod fold;
mod module;
mod value_derive_common;
mod value_derive_enum;
mod value_derive_struct;
mod kw {
pub(crate) use syn::token::{
Enum as enum_, Extern as extern_, Struct as struct_, Where as where_,
};
macro_rules! custom_keyword {
($kw:ident) => {
syn::custom_keyword!($kw);
impl quote::IdentFragment for $kw {
fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
f.write_str(stringify!($kw))
}
fn span(&self) -> Option<proc_macro2::Span> {
Some(self.span)
}
}
crate::fold::no_op_fold!($kw);
};
}
custom_keyword!(clock_domain);
custom_keyword!(connect_inexact);
custom_keyword!(fixed_type);
custom_keyword!(flip);
custom_keyword!(hdl);
custom_keyword!(input);
custom_keyword!(instance);
custom_keyword!(m);
custom_keyword!(memory);
custom_keyword!(memory_array);
custom_keyword!(memory_with_init);
custom_keyword!(no_reset);
custom_keyword!(outline_generated);
custom_keyword!(output);
custom_keyword!(reg_builder);
custom_keyword!(reset);
custom_keyword!(reset_default);
custom_keyword!(skip);
custom_keyword!(target);
custom_keyword!(wire);
}
type Pound = Token![#]; // work around https://github.com/rust-lang/rust/issues/50676
#[derive(Clone, Debug)]
pub(crate) struct HdlAttr<T> {
pub(crate) pound_token: Pound,
pub(crate) style: AttrStyle,
pub(crate) bracket_token: syn::token::Bracket,
pub(crate) hdl: kw::hdl,
pub(crate) paren_token: Option<syn::token::Paren>,
pub(crate) body: T,
}
crate::fold::impl_fold! {
struct HdlAttr<T,> {
pound_token: Pound,
style: AttrStyle,
bracket_token: syn::token::Bracket,
hdl: kw::hdl,
paren_token: Option<syn::token::Paren>,
body: T,
}
}
#[allow(dead_code)]
impl<T> HdlAttr<T> {
pub(crate) fn split_body(self) -> (HdlAttr<()>, T) {
let Self {
pound_token,
style,
bracket_token,
hdl,
paren_token,
body,
} = self;
(
HdlAttr {
pound_token,
style,
bracket_token,
hdl,
paren_token,
body: (),
},
body,
)
}
pub(crate) fn replace_body<T2>(self, body: T2) -> HdlAttr<T2> {
let Self {
pound_token,
style,
bracket_token,
hdl,
paren_token,
body: _,
} = self;
HdlAttr {
pound_token,
style,
bracket_token,
hdl,
paren_token,
body,
}
}
pub(crate) fn as_ref(&self) -> HdlAttr<&T> {
let Self {
pound_token,
style,
bracket_token,
hdl,
paren_token,
ref body,
} = *self;
HdlAttr {
pound_token,
style,
bracket_token,
hdl,
paren_token,
body,
}
}
pub(crate) fn try_map<R, E, F: FnOnce(T) -> Result<R, E>>(self, f: F) -> Result<HdlAttr<R>, E> {
let Self {
pound_token,
style,
bracket_token,
hdl,
paren_token,
body,
} = self;
Ok(HdlAttr {
pound_token,
style,
bracket_token,
hdl,
paren_token,
body: f(body)?,
})
}
pub(crate) fn map<R, F: FnOnce(T) -> R>(self, f: F) -> HdlAttr<R> {
let Self {
pound_token,
style,
bracket_token,
hdl,
paren_token,
body,
} = self;
HdlAttr {
pound_token,
style,
bracket_token,
hdl,
paren_token,
body: f(body),
}
}
fn to_attr(&self) -> Attribute
where
T: ToTokens,
{
parse_quote! { #self }
}
}
impl<T: Default> Default for HdlAttr<T> {
fn default() -> Self {
T::default().into()
}
}
impl<T> From<T> for HdlAttr<T> {
fn from(body: T) -> Self {
HdlAttr {
pound_token: Default::default(),
style: AttrStyle::Outer,
bracket_token: Default::default(),
hdl: Default::default(),
paren_token: Default::default(),
body,
}
}
}
impl<T: ToTokens> ToTokens for HdlAttr<T> {
fn to_tokens(&self, tokens: &mut TokenStream) {
self.pound_token.to_tokens(tokens);
match self.style {
AttrStyle::Inner(style) => style.to_tokens(tokens),
AttrStyle::Outer => {}
};
self.bracket_token.surround(tokens, |tokens| {
self.hdl.to_tokens(tokens);
match self.paren_token {
Some(paren_token) => {
paren_token.surround(tokens, |tokens| self.body.to_tokens(tokens))
}
None => {
let body = self.body.to_token_stream();
if !body.is_empty() {
syn::token::Paren(self.hdl.span)
.surround(tokens, |tokens| tokens.extend([body]));
}
}
}
});
}
}
fn is_hdl_attr(attr: &Attribute) -> bool {
attr.path().is_ident("hdl")
}
impl<T: Parse> HdlAttr<T> {
fn parse_and_take_attr(attrs: &mut Vec<Attribute>) -> syn::Result<Option<Self>> {
let mut retval = None;
let mut errors = Errors::new();
attrs.retain(|attr| {
if is_hdl_attr(attr) {
if retval.is_some() {
errors.push(Error::new_spanned(attr, "more than one #[hdl] attribute"));
}
errors.unwrap_or_default(Self::parse_attr(attr).map(|v| retval = Some(v)));
false
} else {
true
}
});
errors.finish()?;
Ok(retval)
}
fn parse_and_leave_attr(attrs: &[Attribute]) -> syn::Result<Option<Self>> {
let mut retval = None;
let mut errors = Errors::new();
for attr in attrs {
if is_hdl_attr(attr) {
if retval.is_some() {
errors.push(Error::new_spanned(attr, "more than one #[hdl] attribute"));
}
errors.unwrap_or_default(Self::parse_attr(attr).map(|v| retval = Some(v)));
}
}
errors.finish()?;
Ok(retval)
}
fn parse_attr(attr: &Attribute) -> syn::Result<Self> {
match attr.style {
AttrStyle::Outer => Parser::parse2(Self::parse_outer, attr.to_token_stream()),
AttrStyle::Inner(_) => Parser::parse2(Self::parse_inner, attr.to_token_stream()),
}
}
fn parse_starting_with_brackets(
pound_token: Token![#],
style: AttrStyle,
input: ParseStream,
) -> syn::Result<Self> {
let bracket_content;
let bracket_token = bracketed!(bracket_content in input);
let hdl = bracket_content.parse()?;
let paren_content;
let body;
let paren_token;
if bracket_content.is_empty() {
body = match syn::parse2(TokenStream::default()) {
Ok(body) => body,
Err(_) => {
parenthesized!(paren_content in bracket_content);
unreachable!();
}
};
paren_token = None;
} else {
paren_token = Some(parenthesized!(paren_content in bracket_content));
body = paren_content.parse()?;
}
Ok(Self {
pound_token,
style,
bracket_token,
hdl,
paren_token,
body,
})
}
fn parse_inner(input: ParseStream) -> syn::Result<Self> {
let pound_token = input.parse()?;
let style = AttrStyle::Inner(input.parse()?);
Self::parse_starting_with_brackets(pound_token, style, input)
}
fn parse_outer(input: ParseStream) -> syn::Result<Self> {
let pound_token = input.parse()?;
let style = AttrStyle::Outer;
Self::parse_starting_with_brackets(pound_token, style, input)
}
}
pub(crate) struct Errors {
error: Option<Error>,
finished: bool,
}
impl Drop for Errors {
fn drop(&mut self) {
if !std::thread::panicking() {
assert!(self.finished, "didn't run finish");
}
}
}
impl Errors {
pub(crate) fn new() -> Self {
Self {
error: None,
finished: false,
}
}
pub(crate) fn push(&mut self, e: Error) -> &mut Self {
match self.error {
Some(ref mut old) => old.combine(e),
None => self.error = Some(e),
}
self
}
pub(crate) fn push_result(&mut self, e: syn::Result<()>) -> &mut Self {
self.ok(e);
self
}
pub(crate) fn error(
&mut self,
tokens: impl ToTokens,
message: impl std::fmt::Display,
) -> &mut Self {
self.push(Error::new_spanned(tokens, message));
self
}
pub(crate) fn ok<T>(&mut self, v: syn::Result<T>) -> Option<T> {
match v {
Ok(v) => Some(v),
Err(e) => {
self.push(e);
None
}
}
}
pub(crate) fn unwrap_or_else<T>(
&mut self,
v: syn::Result<T>,
fallback: impl FnOnce() -> T,
) -> T {
match v {
Ok(v) => v,
Err(e) => {
self.push(e);
fallback()
}
}
}
pub(crate) fn unwrap_or<T>(&mut self, v: syn::Result<T>, fallback: T) -> T {
self.unwrap_or_else(v, || fallback)
}
pub(crate) fn unwrap_or_default<T: Default>(&mut self, v: syn::Result<T>) -> T {
self.unwrap_or_else(v, T::default)
}
pub(crate) fn finish(&mut self) -> syn::Result<()> {
self.finished = true;
match self.error.take() {
Some(e) => Err(e),
None => Ok(()),
}
}
}
impl Default for Errors {
fn default() -> Self {
Self::new()
}
}
macro_rules! impl_extra_traits_for_options {
(
#[no_ident_fragment]
$enum_vis:vis enum $option_enum_name:ident {
$($Variant:ident($key:ident),)*
}
) => {
impl Copy for $option_enum_name {}
};
(
$enum_vis:vis enum $option_enum_name:ident {
$($Variant:ident($key:ident),)*
}
) => {
impl Copy for $option_enum_name {}
impl quote::IdentFragment for $option_enum_name {
fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
let _ = f;
match *self {
$(Self::$Variant(ref v) => quote::IdentFragment::fmt(&v.0, f),)*
}
}
fn span(&self) -> Option<proc_macro2::Span> {
match *self {
$(Self::$Variant(ref v) => quote::IdentFragment::span(&v.0),)*
}
}
}
impl $option_enum_name {
#[allow(dead_code)]
$enum_vis fn span(&self) -> proc_macro2::Span {
quote::IdentFragment::span(self).unwrap()
}
}
};
(
$(#[no_ident_fragment])?
$enum_vis:vis enum $option_enum_name:ident {
$($Variant:ident($key:ident $(, $value:ty)?),)*
}
) => {};
}
pub(crate) use impl_extra_traits_for_options;
macro_rules! options {
(
#[options = $options_name:ident]
$(#[$($enum_meta:tt)*])*
$enum_vis:vis enum $option_enum_name:ident {
$($Variant:ident($key:ident $(, $value:ty)?),)*
}
) => {
crate::options! {
$(#[$($enum_meta)*])*
$enum_vis enum $option_enum_name {
$($Variant($key $(, $value)?),)*
}
}
#[derive(Clone, Debug, Default)]
$enum_vis struct $options_name {
$($enum_vis $key: Option<(crate::kw::$key, $(syn::token::Paren, $value)?)>,)*
}
crate::fold::impl_fold! {
struct $options_name<> {
$($key: Option<(crate::kw::$key, $(syn::token::Paren, $value)?)>,)*
}
}
impl syn::parse::Parse for $options_name {
fn parse(input: syn::parse::ParseStream) -> syn::Result<Self> {
#![allow(unused_mut, unused_variables, unreachable_code)]
let mut retval = Self::default();
while !input.is_empty() {
let old_input = input.fork();
match input.parse::<$option_enum_name>()? {
$($option_enum_name::$Variant(v) => {
if retval.$key.replace(v).is_some() {
return Err(old_input.error(concat!("duplicate ", stringify!($key), " option")));
}
})*
}
if input.is_empty() {
break;
}
input.parse::<syn::Token![,]>()?;
}
Ok(retval)
}
}
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;
$(if let Some(v) = &self.$key {
separator.to_tokens(tokens);
separator = Some(Default::default());
v.0.to_tokens(tokens);
$(v.1.surround(tokens, |tokens| <$value as quote::ToTokens>::to_tokens(&v.2, tokens));)?
})*
}
}
};
(
$(#[$($enum_meta:tt)*])*
$enum_vis:vis enum $option_enum_name:ident {
$($Variant:ident($key:ident $(, $value:ty)?),)*
}
) => {
#[derive(Clone, Debug)]
$enum_vis enum $option_enum_name {
$($Variant((crate::kw::$key, $(syn::token::Paren, $value)?)),)*
}
crate::impl_extra_traits_for_options! {
$(#[$($enum_meta)*])*
$enum_vis enum $option_enum_name {
$($Variant($key $(, $value)?),)*
}
}
crate::fold::impl_fold! {
enum $option_enum_name<> {
$($Variant((crate::kw::$key, $(syn::token::Paren, $value)?)),)*
}
}
impl syn::parse::Parse for $option_enum_name {
fn parse(input: syn::parse::ParseStream) -> syn::Result<Self> {
let lookahead = input.lookahead1();
$(
if lookahead.peek(crate::kw::$key) {
#[allow(unused_variables)]
let paren_content: syn::parse::ParseBuffer;
return Ok($option_enum_name::$Variant((
input.parse()?,
$(
syn::parenthesized!(paren_content in input),
paren_content.parse::<$value>()?,
)?
)));
}
)*
Err(lookahead.error())
}
}
impl quote::ToTokens for $option_enum_name {
fn to_tokens(&self, tokens: &mut proc_macro2::TokenStream) {
let _ = tokens;
match *self {
$($option_enum_name::$Variant(ref v) => {
v.0.to_tokens(tokens);
$(
let value: &$value = &v.2;
v.1.surround(tokens, |tokens| value.to_tokens(tokens));
)?
})*
}
}
}
};
}
pub(crate) use options;
pub(crate) fn outline_generated(contents: TokenStream, prefix: &str) -> TokenStream {
let out_dir = env!("OUT_DIR");
let mut file = tempfile::Builder::new()
.prefix(prefix)
.rand_bytes(6)
.suffix(".tmp.rs")
.tempfile_in(out_dir)
.unwrap();
let contents = prettyplease::unparse(&parse_quote! { #contents });
let hash = <sha2::Sha256 as sha2::Digest>::digest(&contents);
let hash = base16ct::HexDisplay(&hash[..5]);
file.write_all(contents.as_bytes()).unwrap();
let dest_file = std::path::Path::new(out_dir).join(format!("{prefix}{hash:x}.rs"));
// don't write if it already exists so cargo doesn't try to recompile constantly.
match file.persist_noclobber(&dest_file) {
Err(e) if e.error.kind() == ErrorKind::AlreadyExists => {}
e => {
e.unwrap();
}
}
eprintln!("generated {}", dest_file.display());
let dest_file = dest_file.to_str().unwrap();
quote! {
include!(#dest_file);
}
}
pub fn 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 })?;
let mut contents = func.generate();
if options.body.outline_generated.is_some() {
contents = outline_generated(contents, "module-");
}
Ok(contents)
}
pub fn value_derive(item: TokenStream) -> syn::Result<TokenStream> {
let item = syn::parse2::<Item>(item)?;
match item {
Item::Enum(item) => value_derive_enum::value_derive_enum(item),
Item::Struct(item) => value_derive_struct::value_derive_struct(item),
_ => Err(syn::Error::new(
Span::call_site(),
"derive(Value) can only be used on structs or enums",
)),
}
}

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// SPDX-License-Identifier: LGPL-3.0-or-later
// See Notices.txt for copyright information
use crate::{
is_hdl_attr,
module::transform_body::{HdlLet, HdlLetKindIO},
options, Errors, HdlAttr,
};
use proc_macro2::TokenStream;
use quote::{format_ident, quote, quote_spanned, ToTokens};
use syn::{
parse::{Parse, ParseStream},
parse_quote,
visit::{visit_pat, Visit},
Attribute, Block, Error, FnArg, Ident, ItemFn, ItemStruct, ReturnType, Signature, Visibility,
};
mod transform_body;
options! {
#[options = ConfigOptions]
#[no_ident_fragment]
pub(crate) enum ConfigOption {
OutlineGenerated(outline_generated),
Extern(extern_),
}
}
options! {
pub(crate) enum ModuleIOKind {
Input(input),
Output(output),
}
}
pub(crate) fn check_name_conflicts_with_module_builder(name: &Ident) -> syn::Result<()> {
if name == "m" {
Err(Error::new_spanned(
name,
"name conflicts with implicit `m: &mut ModuleBuilder<_>`",
))
} else {
Ok(())
}
}
pub(crate) struct CheckNameConflictsWithModuleBuilderVisitor<'a> {
pub(crate) errors: &'a mut Errors,
}
impl Visit<'_> for CheckNameConflictsWithModuleBuilderVisitor<'_> {
// TODO: change this to only check for identifiers defining new variables
fn visit_ident(&mut self, node: &Ident) {
self.errors
.push_result(check_name_conflicts_with_module_builder(node));
}
}
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 {
attrs: Vec<Attribute>,
config_options: HdlAttr<ConfigOptions>,
module_kind: ModuleKind,
vis: Visibility,
sig: Signature,
block: Box<Block>,
io: Vec<ModuleIO>,
}
#[derive(Clone, Copy, PartialEq, Eq, Debug, Hash)]
pub(crate) enum ModuleKind {
Extern,
Normal,
}
impl Parse for ModuleFn {
fn parse(input: ParseStream) -> syn::Result<Self> {
let ItemFn {
mut attrs,
vis,
mut sig,
block,
} = input.parse()?;
let Signature {
ref constness,
ref asyncness,
ref unsafety,
ref abi,
fn_token: _,
ident: _,
ref generics,
paren_token: _,
ref mut inputs,
ref variadic,
ref output,
} = sig;
let mut errors = Errors::new();
let config_options = errors
.unwrap_or_default(HdlAttr::parse_and_take_attr(&mut attrs))
.unwrap_or_default();
let ConfigOptions {
outline_generated: _,
extern_,
} = config_options.body;
let module_kind = match extern_ {
Some(_) => ModuleKind::Extern,
None => ModuleKind::Normal,
};
for fn_arg in inputs {
match fn_arg {
FnArg::Receiver(_) => {
errors.push(syn::Error::new_spanned(fn_arg, "self not allowed here"));
}
FnArg::Typed(fn_arg) => {
visit_pat(
&mut CheckNameConflictsWithModuleBuilderVisitor {
errors: &mut errors,
},
&fn_arg.pat,
);
}
}
}
if let Some(constness) = constness {
errors.push(syn::Error::new_spanned(constness, "const not allowed here"));
}
if let Some(asyncness) = asyncness {
errors.push(syn::Error::new_spanned(asyncness, "async not allowed here"));
}
if let Some(unsafety) = unsafety {
errors.push(syn::Error::new_spanned(unsafety, "unsafe not allowed here"));
}
if let Some(abi) = abi {
errors.push(syn::Error::new_spanned(abi, "extern not allowed here"));
}
if !generics.params.is_empty() {
errors.push(syn::Error::new_spanned(
&generics.params,
"generics are not supported yet",
));
}
if let Some(variadic) = variadic {
errors.push(syn::Error::new_spanned(variadic, "... not allowed here"));
}
if !matches!(output, ReturnType::Default) {
errors.push(syn::Error::new_spanned(
output,
"return type not allowed here",
));
}
let body_results = errors.ok(transform_body::transform_body(module_kind, block));
errors.finish()?;
let (block, io) = body_results.unwrap();
Ok(Self {
attrs,
config_options,
module_kind,
vis,
sig,
block,
io,
})
}
}
impl ModuleFn {
pub(crate) fn generate(self) -> TokenStream {
let Self {
attrs,
config_options,
module_kind,
vis,
sig,
block,
io,
} = self;
let ConfigOptions {
outline_generated: _,
extern_: _,
} = config_options.body;
let mut outer_sig = sig.clone();
let mut body_sig = sig;
let param_names =
Vec::from_iter(outer_sig.inputs.iter_mut().enumerate().map(|(index, arg)| {
let FnArg::Typed(arg) = arg else {
unreachable!("already checked");
};
let name = if let syn::Pat::Ident(pat) = &*arg.pat {
pat.ident.clone()
} else {
format_ident!("__param{}", index)
};
*arg.pat = syn::Pat::Ident(syn::PatIdent {
attrs: vec![],
by_ref: None,
mutability: None,
ident: name.clone(),
subpat: None,
});
name
}));
let module_kind_ty = match module_kind {
ModuleKind::Extern => quote! { ::fayalite::module::ExternModule },
ModuleKind::Normal => quote! { ::fayalite::module::NormalModule },
};
let fn_name = &outer_sig.ident;
body_sig.ident = parse_quote! {__body};
body_sig.inputs.insert(
0,
parse_quote! {m: &mut ::fayalite::module::ModuleBuilder<#fn_name, #module_kind_ty>},
);
let body_fn = ItemFn {
attrs: vec![],
vis: Visibility::Inherited,
sig: body_sig,
block,
};
outer_sig.output =
parse_quote! {-> ::fayalite::intern::Interned<::fayalite::module::Module<#fn_name>>};
let io_flips = io
.iter()
.map(|io| match io.kind.kind {
ModuleIOKind::Input((input,)) => quote_spanned! {input.span=>
#[hdl(flip)]
},
ModuleIOKind::Output(_) => quote! {},
})
.collect::<Vec<_>>();
let io_types = io.iter().map(|io| &io.kind.ty).collect::<Vec<_>>();
let io_names = io.iter().map(|io| &io.name).collect::<Vec<_>>();
let fn_name_str = fn_name.to_string();
let block = parse_quote! {{
#body_fn
::fayalite::module::ModuleBuilder::run(#fn_name_str, |m| __body(m, #(#param_names,)*))
}};
let fixed_type = io.iter().all(|io| io.kind.ty_expr.is_none());
let struct_options = if fixed_type {
quote! { #[hdl(fixed_type)] }
} 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
#vis struct #fn_name {
#(
#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,
sig: outer_sig,
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
}
}

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// SPDX-License-Identifier: LGPL-3.0-or-later
// See Notices.txt for copyright information
use crate::{module::transform_body::Visitor, options, Errors, HdlAttr};
use proc_macro2::{Span, TokenStream};
use quote::{format_ident, quote_spanned, ToTokens, TokenStreamExt};
use syn::{
parse::Nothing,
parse_quote, parse_quote_spanned,
punctuated::{Pair, Punctuated},
spanned::Spanned,
token::{Brace, Paren},
Attribute, Expr, ExprArray, ExprCall, ExprGroup, ExprPath, ExprStruct, ExprTuple, 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,
pub(crate) variant: Option<(TypePath, Ident)>,
}
#[derive(Debug, Copy, Clone)]
pub(crate) struct SingleSegmentVariant {
pub(crate) name: &'static str,
pub(crate) make_type_path: fn(Span, &PathArguments) -> Path,
}
impl StructOrEnumPath {
pub(crate) const SINGLE_SEGMENT_VARIANTS: &'static [SingleSegmentVariant] = {
fn make_option_type_path(span: Span, arguments: &PathArguments) -> Path {
let arguments = if arguments.is_none() {
quote_spanned! {span=>
<_>
}
} else {
arguments.to_token_stream()
};
parse_quote_spanned! {span=>
::fayalite::__std::option::Option #arguments
}
}
fn make_result_type_path(span: Span, arguments: &PathArguments) -> Path {
let arguments = if arguments.is_none() {
quote_spanned! {span=>
<_, _>
}
} else {
arguments.to_token_stream()
};
parse_quote_spanned! {span=>
::fayalite::__std::result::Result #arguments
}
}
&[
SingleSegmentVariant {
name: "Some",
make_type_path: make_option_type_path,
},
SingleSegmentVariant {
name: "None",
make_type_path: make_option_type_path,
},
SingleSegmentVariant {
name: "Ok",
make_type_path: make_result_type_path,
},
SingleSegmentVariant {
name: "Err",
make_type_path: make_result_type_path,
},
]
};
pub(crate) fn new(
errors: &mut Errors,
path: TypePath,
options: &AggregateLiteralOptions,
) -> Result<Self, ()> {
let Path {
leading_colon,
segments,
} = &path.path;
let qself_position = path.qself.as_ref().map(|qself| qself.position).unwrap_or(0);
let variant_name = if qself_position < segments.len() {
Some(segments.last().unwrap().ident.clone())
} else {
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 {
name,
make_type_path,
} in Self::SINGLE_SEGMENT_VARIANTS
{
if ident == name {
break 'guess_enum_type Some(Some(TypePath {
qself: None,
path: make_type_path(ident.span(), arguments),
}));
}
}
}
if segments.len() == qself_position + 2
&& segments[qself_position + 1].arguments.is_none()
&& (path.qself.is_some()
|| segments[qself_position].ident.to_string().as_bytes()[0]
.is_ascii_uppercase())
{
let mut ty = path.clone();
ty.path.segments.pop();
ty.path.segments.pop_punct();
break 'guess_enum_type Some(Some(ty));
}
None
};
if let Some(enum_type) = enum_type {
let ty = if let Some(enum_type) = enum_type {
enum_type
} else {
if qself_position >= segments.len() {
errors.error(path, "#[hdl]: can't figure out enum's type");
return Err(());
}
let mut ty = path.clone();
ty.path.segments.pop();
ty.path.segments.pop_punct();
ty
};
let Some(variant_name) = variant_name else {
errors.error(path, "#[hdl]: can't figure out enum's variant name");
return Err(());
};
Ok(Self {
ty,
variant: Some((path, variant_name)),
})
} else {
Ok(Self {
ty: path,
variant: None,
})
}
}
}
#[derive(Copy, Clone, Debug)]
pub(crate) enum BraceOrParen {
Brace(Brace),
Paren(Paren),
}
impl BraceOrParen {
pub(crate) fn surround(self, tokens: &mut TokenStream, f: impl FnOnce(&mut TokenStream)) {
match self {
BraceOrParen::Brace(v) => v.surround(tokens, f),
BraceOrParen::Paren(v) => v.surround(tokens, f),
}
}
}
#[derive(Debug, Clone)]
pub(crate) struct StructOrEnumLiteralField {
pub(crate) attrs: Vec<Attribute>,
pub(crate) member: Member,
pub(crate) colon_token: Option<Token![:]>,
pub(crate) expr: Expr,
}
#[derive(Debug, Clone)]
pub(crate) struct StructOrEnumLiteral {
pub(crate) attrs: Vec<Attribute>,
pub(crate) path: TypePath,
pub(crate) brace_or_paren: BraceOrParen,
pub(crate) fields: Punctuated<StructOrEnumLiteralField, Token![,]>,
pub(crate) dot2_token: Option<Token![..]>,
pub(crate) rest: Option<Box<Expr>>,
}
impl StructOrEnumLiteral {
pub(crate) fn map_field_exprs(self, mut f: impl FnMut(Expr) -> Expr) -> Self {
self.map_fields(|mut field| {
field.expr = f(field.expr);
field
})
}
pub(crate) fn map_fields(
self,
mut f: impl FnMut(StructOrEnumLiteralField) -> StructOrEnumLiteralField,
) -> Self {
let Self {
attrs,
path,
brace_or_paren,
fields,
dot2_token,
rest,
} = self;
let fields = Punctuated::from_iter(fields.into_pairs().map(|p| {
let (field, comma) = p.into_tuple();
Pair::new(f(field), comma)
}));
Self {
attrs,
path,
brace_or_paren,
fields,
dot2_token,
rest,
}
}
}
impl From<ExprStruct> for StructOrEnumLiteral {
fn from(value: ExprStruct) -> Self {
let ExprStruct {
attrs,
qself,
path,
brace_token,
fields,
dot2_token,
rest,
} = value;
Self {
attrs,
path: TypePath { qself, path },
brace_or_paren: BraceOrParen::Brace(brace_token),
fields: Punctuated::from_iter(fields.into_pairs().map(|v| {
let (
FieldValue {
attrs,
member,
colon_token,
expr,
},
comma,
) = v.into_tuple();
Pair::new(
StructOrEnumLiteralField {
attrs,
member,
colon_token,
expr,
},
comma,
)
})),
dot2_token,
rest,
}
}
}
fn expr_to_member(expr: &Expr) -> Option<Member> {
syn::parse2(expr.to_token_stream()).ok()
}
impl ToTokens for StructOrEnumLiteral {
fn to_tokens(&self, tokens: &mut TokenStream) {
let Self {
attrs,
path,
brace_or_paren,
fields,
dot2_token,
rest,
} = self;
tokens.append_all(attrs);
path.to_tokens(tokens);
brace_or_paren.surround(tokens, |tokens| {
match brace_or_paren {
BraceOrParen::Brace(_) => {
for (
StructOrEnumLiteralField {
attrs,
member,
mut colon_token,
expr,
},
comma,
) in fields.pairs().map(|v| v.into_tuple())
{
tokens.append_all(attrs);
if Some(member) != expr_to_member(expr).as_ref() {
colon_token = Some(<Token![:]>::default());
}
member.to_tokens(tokens);
colon_token.to_tokens(tokens);
expr.to_tokens(tokens);
comma.to_tokens(tokens);
}
}
BraceOrParen::Paren(_) => {
for (
StructOrEnumLiteralField {
attrs,
member: _,
colon_token: _,
expr,
},
comma,
) in fields.pairs().map(|v| v.into_tuple())
{
tokens.append_all(attrs);
expr.to_tokens(tokens);
comma.to_tokens(tokens);
}
}
}
if let Some(rest) = rest {
dot2_token.unwrap_or_default().to_tokens(tokens);
rest.to_tokens(tokens);
}
});
}
}
impl Visitor {
pub(crate) fn process_hdl_array(
&mut self,
hdl_attr: HdlAttr<Nothing>,
mut expr_array: ExprArray,
) -> Expr {
self.require_normal_module(hdl_attr);
for elem in &mut expr_array.elems {
*elem = parse_quote_spanned! {elem.span()=>
::fayalite::expr::ToExpr::to_expr(&(#elem))
};
}
parse_quote! {::fayalite::expr::ToExpr::to_expr(&#expr_array)}
}
pub(crate) fn process_struct_enum(
&mut self,
hdl_attr: HdlAttr<AggregateLiteralOptions>,
mut literal: StructOrEnumLiteral,
) -> Expr {
let span = hdl_attr.hdl.span;
if let Some(rest) = literal.rest.take() {
self.errors
.error(rest, "#[hdl] struct functional update syntax not supported");
}
let mut next_var = 0usize;
let mut new_var = || -> Ident {
let retval = format_ident!("__v{}", next_var, span = span);
next_var += 1;
retval
};
let infallible_var = new_var();
let retval_var = new_var();
let mut lets = vec![];
let mut build_steps = vec![];
let literal = literal.map_field_exprs(|expr| {
let field_var = new_var();
lets.push(quote_spanned! {span=>
let #field_var = ::fayalite::expr::ToExpr::to_expr(&#expr);
});
parse_quote! { #field_var }
});
let Ok(StructOrEnumPath { ty, variant }) =
StructOrEnumPath::new(&mut self.errors, literal.path.clone(), &hdl_attr.body)
else {
return parse_quote_spanned! {span=>
{}
};
};
for StructOrEnumLiteralField {
attrs: _,
member,
colon_token: _,
expr,
} in literal.fields.iter()
{
let field_fn = format_ident!("field_{}", member);
build_steps.push(quote_spanned! {span=>
let #retval_var = #retval_var.#field_fn(#expr);
});
}
let check_literal = literal.map_field_exprs(|expr| {
parse_quote_spanned! {span=>
::fayalite::expr::value_from_expr_type(#expr, #infallible_var)
}
});
let make_expr_fn = if let Some((_variant_path, variant_ident)) = &variant {
let variant_fn = format_ident!("variant_{}", variant_ident);
build_steps.push(quote_spanned! {span=>
let #retval_var = #retval_var.#variant_fn();
});
quote_spanned! {span=>
::fayalite::expr::make_enum_expr
}
} else {
build_steps.push(quote_spanned! {span=>
let #retval_var = #retval_var.build();
});
quote_spanned! {span=>
::fayalite::expr::make_bundle_expr
}
};
let variant_or_type =
variant.map_or_else(|| ty.clone(), |(variant_path, _variant_ident)| variant_path);
parse_quote_spanned! {span=>
{
#(#lets)*
#make_expr_fn::<#ty>(|#infallible_var| {
let #retval_var = #check_literal;
match #retval_var {
#variant_or_type { .. } => #retval_var,
#[allow(unreachable_patterns)]
_ => match #infallible_var {},
}
}, |#retval_var| {
#(#build_steps)*
#retval_var
})
}
}
}
pub(crate) fn process_hdl_struct(
&mut self,
hdl_attr: HdlAttr<AggregateLiteralOptions>,
expr_struct: ExprStruct,
) -> Expr {
self.require_normal_module(&hdl_attr);
self.process_struct_enum(hdl_attr, expr_struct.into())
}
pub(crate) fn process_hdl_tuple(
&mut self,
hdl_attr: HdlAttr<Nothing>,
expr_tuple: ExprTuple,
) -> Expr {
self.require_normal_module(hdl_attr);
parse_quote_spanned! {expr_tuple.span()=>
::fayalite::expr::ToExpr::to_expr(&#expr_tuple)
}
}
pub(crate) fn process_hdl_path(
&mut self,
hdl_attr: HdlAttr<Nothing>,
expr_path: ExprPath,
) -> Expr {
self.require_normal_module(hdl_attr);
parse_quote_spanned! {expr_path.span()=>
::fayalite::expr::ToExpr::to_expr(&#expr_path)
}
}
pub(crate) fn process_hdl_call(
&mut self,
hdl_attr: HdlAttr<AggregateLiteralOptions>,
expr_call: ExprCall,
) -> Expr {
self.require_normal_module(&hdl_attr);
let ExprCall {
attrs: mut literal_attrs,
func,
paren_token,
args,
} = expr_call;
let mut path_expr = *func;
let path = loop {
break match path_expr {
Expr::Group(ExprGroup {
attrs,
group_token: _,
expr,
}) => {
literal_attrs.extend(attrs);
path_expr = *expr;
continue;
}
Expr::Path(ExprPath { attrs, qself, path }) => {
literal_attrs.extend(attrs);
TypePath { qself, path }
}
_ => {
self.errors.error(&path_expr, "missing tuple struct's name");
return parse_quote_spanned! {path_expr.span()=>
{}
};
}
};
};
let fields = Punctuated::from_iter(args.into_pairs().enumerate().map(|(index, p)| {
let (expr, comma) = p.into_tuple();
let mut index = Index::from(index);
index.span = hdl_attr.hdl.span;
Pair::new(
StructOrEnumLiteralField {
attrs: vec![],
member: Member::Unnamed(index),
colon_token: None,
expr,
},
comma,
)
}));
self.process_struct_enum(
hdl_attr,
StructOrEnumLiteral {
attrs: literal_attrs,
path,
brace_or_paren: BraceOrParen::Paren(paren_token),
fields,
dot2_token: None,
rest: None,
},
)
}
}

625
crates/fayalite-proc-macros-impl/src/module/transform_body/expand_match.rs Normal file
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@ -0,0 +1,625 @@
// SPDX-License-Identifier: LGPL-3.0-or-later
// See Notices.txt for copyright information
use crate::{
fold::impl_fold,
module::transform_body::{
expand_aggregate_literals::{AggregateLiteralOptions, StructOrEnumPath},
with_debug_clone_and_fold, Visitor,
},
Errors, HdlAttr,
};
use proc_macro2::{Span, TokenStream};
use quote::{ToTokens, TokenStreamExt};
use syn::{
fold::{fold_arm, fold_expr_match, fold_pat, Fold},
parse::Nothing,
parse_quote_spanned,
punctuated::{Pair, Punctuated},
spanned::Spanned,
token::{Brace, Paren},
Arm, Attribute, Expr, ExprMatch, FieldPat, Ident, Index, Member, Pat, PatIdent, PatOr,
PatParen, PatPath, PatRest, PatStruct, PatTupleStruct, PatWild, Path, Token, TypePath,
};
with_debug_clone_and_fold! {
struct MatchPatBinding<> {
ident: Ident,
}
}
impl ToTokens for MatchPatBinding {
fn to_tokens(&self, tokens: &mut TokenStream) {
let Self { ident } = self;
ident.to_tokens(tokens);
}
}
with_debug_clone_and_fold! {
struct MatchPatParen<P> {
paren_token: Paren,
pat: Box<P>,
}
}
impl<P: ToTokens> ToTokens for MatchPatParen<P> {
fn to_tokens(&self, tokens: &mut TokenStream) {
let Self { paren_token, pat } = self;
paren_token.surround(tokens, |tokens| pat.to_tokens(tokens));
}
}
with_debug_clone_and_fold! {
struct MatchPatOr<P> {
leading_vert: Option<Token![|]>,
cases: Punctuated<P, Token![|]>,
}
}
impl<P: ToTokens> ToTokens for MatchPatOr<P> {
fn to_tokens(&self, tokens: &mut TokenStream) {
let Self {
leading_vert,
cases,
} = self;
leading_vert.to_tokens(tokens);
cases.to_tokens(tokens);
}
}
with_debug_clone_and_fold! {
struct MatchPatWild<> {
underscore_token: Token![_],
}
}
impl ToTokens for MatchPatWild {
fn to_tokens(&self, tokens: &mut TokenStream) {
let Self { underscore_token } = self;
underscore_token.to_tokens(tokens);
}
}
with_debug_clone_and_fold! {
struct MatchPatStructField<> {
member: Member,
colon_token: Option<Token![:]>,
pat: MatchPatSimple,
}
}
impl ToTokens for MatchPatStructField {
fn to_tokens(&self, tokens: &mut TokenStream) {
let Self {
member,
colon_token,
pat,
} = self;
member.to_tokens(tokens);
colon_token.to_tokens(tokens);
pat.to_tokens(tokens);
}
}
impl MatchPatStructField {
fn parse(state: &mut HdlMatchParseState<'_>, field_pat: FieldPat) -> Result<Self, ()> {
let FieldPat {
attrs: _,
member,
colon_token,
pat,
} = field_pat;
Ok(Self {
member,
colon_token,
pat: MatchPatSimple::parse(state, *pat)?,
})
}
}
with_debug_clone_and_fold! {
struct MatchPatStruct<> {
resolved_path: Path,
brace_token: Brace,
fields: Punctuated<MatchPatStructField, Token![,]>,
rest: Option<Token![..]>,
}
}
impl ToTokens for MatchPatStruct {
fn to_tokens(&self, tokens: &mut TokenStream) {
let Self {
resolved_path,
brace_token,
fields,
rest,
} = self;
resolved_path.to_tokens(tokens);
brace_token.surround(tokens, |tokens| {
fields.to_tokens(tokens);
rest.to_tokens(tokens);
})
}
}
#[derive(Debug, Clone)]
enum MatchPatSimple {
Paren(MatchPatParen<MatchPatSimple>),
Or(MatchPatOr<MatchPatSimple>),
Binding(MatchPatBinding),
Wild(MatchPatWild),
}
impl_fold! {
enum MatchPatSimple<> {
Paren(MatchPatParen<MatchPatSimple>),
Or(MatchPatOr<MatchPatSimple>),
Binding(MatchPatBinding),
Wild(MatchPatWild),
}
}
impl ToTokens for MatchPatSimple {
fn to_tokens(&self, tokens: &mut TokenStream) {
match self {
Self::Or(v) => v.to_tokens(tokens),
Self::Paren(v) => v.to_tokens(tokens),
Self::Binding(v) => v.to_tokens(tokens),
Self::Wild(v) => v.to_tokens(tokens),
}
}
}
fn is_pat_ident_a_struct_or_enum_name(ident: &Ident) -> bool {
ident
.to_string()
.starts_with(|ch: char| ch.is_ascii_uppercase())
}
trait ParseMatchPat: Sized {
fn simple(v: MatchPatSimple) -> Self;
fn or(v: MatchPatOr<Self>) -> Self;
fn paren(v: MatchPatParen<Self>) -> Self;
fn struct_(
state: &mut HdlMatchParseState<'_>,
v: MatchPatStruct,
struct_error_spanned: &dyn ToTokens,
) -> Result<Self, ()>;
fn parse(state: &mut HdlMatchParseState<'_>, pat: Pat) -> Result<Self, ()> {
match pat {
Pat::Ident(PatIdent {
attrs: _,
by_ref,
mutability,
ident,
subpat,
}) => {
if let Some(by_ref) = by_ref {
state
.errors
.error(by_ref, "ref not allowed in #[hdl] patterns");
}
if let Some(mutability) = mutability {
state
.errors
.error(mutability, "mut not allowed in #[hdl] patterns");
}
if let Some((at_token, _)) = subpat {
state
.errors
.error(at_token, "@ not allowed in #[hdl] patterns");
}
if is_pat_ident_a_struct_or_enum_name(&ident) {
let ident_span = ident.span();
let resolved_path = state.resolve_enum_struct_path(TypePath {
qself: None,
path: ident.clone().into(),
})?;
Self::struct_(
state,
MatchPatStruct {
resolved_path,
brace_token: Brace(ident_span),
fields: Punctuated::new(),
rest: None,
},
&ident,
)
} else {
Ok(Self::simple(MatchPatSimple::Binding(MatchPatBinding {
ident,
})))
}
}
Pat::Or(PatOr {
attrs: _,
leading_vert,
cases,
}) => Ok(Self::or(MatchPatOr {
leading_vert,
cases: cases
.into_pairs()
.filter_map(|pair| {
let (pat, punct) = pair.into_tuple();
let pat = Self::parse(state, pat).ok()?;
Some(Pair::new(pat, punct))
})
.collect(),
})),
Pat::Paren(PatParen {
attrs: _,
paren_token,
pat,
}) => Ok(Self::paren(MatchPatParen {
paren_token,
pat: Box::new(Self::parse(state, *pat)?),
})),
Pat::Path(PatPath {
attrs: _,
qself,
path,
}) => {
let path = TypePath { qself, path };
let path_span = path.span();
let resolved_path = state.resolve_enum_struct_path(path.clone())?;
Self::struct_(
state,
MatchPatStruct {
resolved_path,
brace_token: Brace(path_span),
fields: Punctuated::new(),
rest: None,
},
&path,
)
}
Pat::Struct(PatStruct {
attrs: _,
qself,
path,
brace_token,
fields,
rest,
}) => {
let fields = fields
.into_pairs()
.filter_map(|pair| {
let (field_pat, punct) = pair.into_tuple();
let field_pat = MatchPatStructField::parse(state, field_pat).ok()?;
Some(Pair::new(field_pat, punct))
})
.collect();
let path = TypePath { qself, path };
let resolved_path = state.resolve_enum_struct_path(path.clone())?;
Self::struct_(
state,
MatchPatStruct {
resolved_path,
brace_token,
fields,
rest: rest.map(
|PatRest {
attrs: _,
dot2_token,
}| dot2_token,
),
},
&path,
)
}
Pat::TupleStruct(PatTupleStruct {
attrs: _,
qself,
path,
paren_token,
mut elems,
}) => {
let rest = if let Some(&Pat::Rest(PatRest {
attrs: _,
dot2_token,
})) = elems.last()
{
elems.pop();
Some(dot2_token)
} else {
None
};
let fields = elems
.into_pairs()
.enumerate()
.filter_map(|(index, pair)| {
let (pat, punct) = pair.into_tuple();
let pat = MatchPatSimple::parse(state, pat).ok()?;
let mut index = Index::from(index);
index.span = state.span;
let field = MatchPatStructField {
member: index.into(),
colon_token: Some(Token![:](state.span)),
pat,
};
Some(Pair::new(field, punct))
})
.collect();
let path = TypePath { qself, path };
let resolved_path = state.resolve_enum_struct_path(path.clone())?;
Self::struct_(
state,
MatchPatStruct {
resolved_path,
brace_token: Brace {
span: paren_token.span,
},
fields,
rest,
},
&path,
)
}
Pat::Rest(_) => {
state
.errors
.error(pat, "not allowed here in #[hdl] patterns");
Err(())
}
Pat::Wild(PatWild {
attrs: _,
underscore_token,
}) => Ok(Self::simple(MatchPatSimple::Wild(MatchPatWild {
underscore_token,
}))),
Pat::Tuple(_) | Pat::Slice(_) | Pat::Const(_) | Pat::Lit(_) | Pat::Range(_) => {
state
.errors
.error(pat, "not yet implemented in #[hdl] patterns");
Err(())
}
_ => {
state.errors.error(pat, "not allowed in #[hdl] patterns");
Err(())
}
}
}
}
impl ParseMatchPat for MatchPatSimple {
fn simple(v: MatchPatSimple) -> Self {
v
}
fn or(v: MatchPatOr<Self>) -> Self {
Self::Or(v)
}
fn paren(v: MatchPatParen<Self>) -> Self {
Self::Paren(v)
}
fn struct_(
state: &mut HdlMatchParseState<'_>,
_v: MatchPatStruct,
struct_error_spanned: &dyn ToTokens,
) -> Result<Self, ()> {
state.errors.error(
struct_error_spanned,
"not yet implemented inside structs/enums in #[hdl] patterns",
);
Err(())
}
}
#[derive(Debug, Clone)]
enum MatchPat {
Simple(MatchPatSimple),
Or(MatchPatOr<MatchPat>),
Paren(MatchPatParen<MatchPat>),
Struct(MatchPatStruct),
}
impl_fold! {
enum MatchPat<> {
Simple(MatchPatSimple),
Or(MatchPatOr<MatchPat>),
Paren(MatchPatParen<MatchPat>),
Struct(MatchPatStruct),
}
}
impl ParseMatchPat for MatchPat {
fn simple(v: MatchPatSimple) -> Self {
Self::Simple(v)
}
fn or(v: MatchPatOr<Self>) -> Self {
Self::Or(v)
}
fn paren(v: MatchPatParen<Self>) -> Self {
Self::Paren(v)
}
fn struct_(
_state: &mut HdlMatchParseState<'_>,
v: MatchPatStruct,
_struct_error_spanned: &dyn ToTokens,
) -> Result<Self, ()> {
Ok(Self::Struct(v))
}
}
impl ToTokens for MatchPat {
fn to_tokens(&self, tokens: &mut TokenStream) {
match self {
Self::Simple(v) => v.to_tokens(tokens),
Self::Or(v) => v.to_tokens(tokens),
Self::Paren(v) => v.to_tokens(tokens),
Self::Struct(v) => v.to_tokens(tokens),
}
}
}
with_debug_clone_and_fold! {
struct MatchArm<> {
attrs: Vec<Attribute>,
pat: MatchPat,
fat_arrow_token: Token![=>],
body: Box<Expr>,
comma: Option<Token![,]>,
}
}
impl MatchArm {
fn parse(state: &mut HdlMatchParseState<'_>, arm: Arm) -> Result<Self, ()> {
let Arm {
attrs,
pat,
guard,
fat_arrow_token,
body,
comma,
} = arm;
if let Some((if_, _)) = guard {
state
.errors
.error(if_, "#[hdl] match arm if clauses are not implemented");
}
Ok(Self {
attrs,
pat: MatchPat::parse(state, pat)?,
fat_arrow_token,
body,
comma,
})
}
}
impl ToTokens for MatchArm {
fn to_tokens(&self, tokens: &mut TokenStream) {
let Self {
attrs,
pat,
fat_arrow_token,
body,
comma,
} = self;
tokens.append_all(attrs);
pat.to_tokens(tokens);
fat_arrow_token.to_tokens(tokens);
body.to_tokens(tokens);
comma.to_tokens(tokens);
}
}
struct RewriteAsCheckMatch {
span: Span,
}
impl Fold for RewriteAsCheckMatch {
fn fold_field_pat(&mut self, mut i: FieldPat) -> FieldPat {
i.colon_token = Some(Token![:](i.member.span()));
i
}
fn fold_pat(&mut self, i: Pat) -> Pat {
match i {
Pat::Ident(PatIdent {
attrs,
by_ref,
mutability,
ident,
subpat: None,
}) if is_pat_ident_a_struct_or_enum_name(&ident) => {
parse_quote_spanned! {ident.span()=>
#(#attrs)*
#by_ref
#mutability
#ident {}
}
}
_ => fold_pat(self, i),
}
}
fn fold_pat_ident(&mut self, mut i: PatIdent) -> PatIdent {
i.by_ref = Some(Token![ref](i.ident.span()));
i.mutability = None;
i
}
fn fold_arm(&mut self, mut i: Arm) -> Arm {
i.body = parse_quote_spanned! {self.span=>
match __infallible {}
};
i.comma.get_or_insert_with(|| Token![,](self.span));
fold_arm(self, i)
}
fn fold_expr_match(&mut self, mut i: ExprMatch) -> ExprMatch {
i.expr = parse_quote_spanned! {self.span=>
__match_value
};
fold_expr_match(self, i)
}
fn fold_expr(&mut self, i: Expr) -> Expr {
// don't recurse into expressions
i
}
}
struct HdlMatchParseState<'a> {
errors: &'a mut Errors,
span: Span,
}
impl HdlMatchParseState<'_> {
fn resolve_enum_struct_path(&mut self, path: TypePath) -> Result<Path, ()> {
let StructOrEnumPath { ty, variant } =
StructOrEnumPath::new(self.errors, path, &AggregateLiteralOptions::default())?;
Ok(if let Some((_variant_path, variant_name)) = variant {
parse_quote_spanned! {self.span=>
__MatchTy::<#ty>::#variant_name
}
} else {
parse_quote_spanned! {self.span=>
__MatchTy::<#ty>
}
})
}
}
impl Visitor {
pub(crate) fn process_hdl_match(
&mut self,
_hdl_attr: HdlAttr<Nothing>,
expr_match: ExprMatch,
) -> Expr {
let span = expr_match.match_token.span();
let check_match = RewriteAsCheckMatch { span }.fold_expr_match(expr_match.clone());
let ExprMatch {
attrs: _,
match_token,
expr,
brace_token: _,
arms,
} = expr_match;
self.require_normal_module(match_token);
let mut state = HdlMatchParseState {
errors: &mut self.errors,
span,
};
let arms = Vec::from_iter(
arms.into_iter()
.filter_map(|arm| MatchArm::parse(&mut state, arm).ok()),
);
parse_quote_spanned! {span=>
{
type __MatchTy<V> = <<V as ::fayalite::expr::ToExpr>::Type as ::fayalite::ty::Type>::MatchVariant;
let __match_expr = ::fayalite::expr::ToExpr::to_expr(&(#expr));
::fayalite::expr::check_match_expr(__match_expr, |__match_value, __infallible| {
#[allow(unused_variables)]
#check_match
});
for __match_variant in m.match_(__match_expr) {
let (__match_variant, __scope) = ::fayalite::ty::MatchVariantAndInactiveScope::match_activate_scope(__match_variant);
#match_token __match_variant {
#(#arms)*
}
}
}
}
}
}

746
crates/fayalite-proc-macros-impl/src/value_derive_common.rs Normal file
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@ -0,0 +1,746 @@
// 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) fixed_type_generics: Generics,
}
impl ValueDeriveGenerics {
pub(crate) fn get(mut generics: Generics, where_: &Option<(Where, Paren, Bounds)>) -> Self {
let mut fixed_type_generics = generics.clone();
if let Some((_, _, bounds)) = where_ {
generics
.make_where_clause()
.predicates
.extend(bounds.0.iter().cloned());
fixed_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 fixed_type_predicates = &mut fixed_type_generics.make_where_clause().predicates;
for type_param in type_params {
predicates.push(parse_quote! {#type_param: ::fayalite::ty::Value});
predicates.push(parse_quote! {<#type_param as ::fayalite::expr::ToExpr>::Type: ::fayalite::ty::Type<Value = #type_param>});
fixed_type_predicates.push(parse_quote! {#type_param: ::fayalite::ty::Value});
fixed_type_predicates.push(parse_quote! {<#type_param as ::fayalite::expr::ToExpr>::Type: ::fayalite::ty::FixedType<Value = #type_param>});
fixed_type_predicates.push(parse_quote! {<<#type_param as ::fayalite::expr::ToExpr>::Type as ::fayalite::ty::Type>::MaskType: ::fayalite::ty::FixedType});
}
}
Self {
generics,
fixed_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
{
}
}
}

901
crates/fayalite-proc-macros-impl/src/value_derive_enum.rs Normal file
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@ -0,0 +1,901 @@
// 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,
fixed_type: Some(Default::default()),
where_: Some((
Default::default(),
Default::default(),
ValueDeriveGenerics::get(
enum_generics.clone(),
&enum_options.where_,
)
.fixed_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: _,
fixed_type_generics,
} = ValueDeriveGenerics::get(enum_generics.clone(), where_);
let (fixed_type_impl_generics, fixed_type_type_generics, fixed_type_where_clause) =
fixed_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,
&fixed_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 #fixed_type_impl_generics ::fayalite::__std::fmt::Debug for #value_struct_ident #fixed_type_type_generics
#fixed_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 #fixed_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: fixed_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,
&fixed_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 = fixed_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 #fixed_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 #fixed_type_type_generics>::new_unchecked(
::fayalite::__std::option::Option::None,
#variant_index,
::fayalite::ty::FixedType::fixed_type(),
),
)
}
},
VariantValue::Direct { value_type: _ } => parse_quote! {
{
::fayalite::expr::ToExpr::to_expr(
&::fayalite::expr::ops::EnumLiteral::<#type_struct_ident #fixed_type_type_generics>::new_unchecked(
::fayalite::__std::option::Option::Some(#(#builder_field_vars)*.to_canonical_dyn()),
#variant_index,
::fayalite::ty::FixedType::fixed_type(),
),
)
}
},
VariantValue::Struct {
parsed_struct:
ParsedStruct {
names:
ParsedStructNames {
type_struct_ident: field_type_struct_ident,
..
},
..
},
..
} => parse_quote! {
{
let __builder = <#field_type_struct_ident #fixed_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 #fixed_type_type_generics>::new_unchecked(
::fayalite::__std::option::Option::Some(__builder.build().to_canonical_dyn()),
#variant_index,
::fayalite::ty::FixedType::fixed_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> })
},
),
&fixed_type_generics,
&parse_quote! {#type_struct_ident #fixed_type_type_generics},
&parse_quote! { ::fayalite::expr::Expr<#target #fixed_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: fixed_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,
&fixed_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 #fixed_type_impl_generics ::fayalite::__std::fmt::Debug for #match_enum_ident #fixed_type_type_generics
#fixed_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 #fixed_type_impl_generics ::fayalite::ty::FixedType for #type_struct_ident #fixed_type_type_generics
#fixed_type_where_clause
{
fn fixed_type() -> Self {
Self {
#(#non_empty_variant_names: ::fayalite::ty::FixedType::fixed_type(),)*
}
}
}
fn __check_field<T: ::fayalite::ty::Value>()
where
<T as ::fayalite::expr::ToExpr>::Type: ::fayalite::ty::Type<Value = T>,
{}
fn __check_fields #fixed_type_impl_generics(_: #target #fixed_type_type_generics)
#fixed_type_where_clause
{
#(#field_checks)*
}
#[automatically_derived]
impl #fixed_type_impl_generics ::fayalite::__std::fmt::Debug for #type_struct_ident #fixed_type_type_generics
#fixed_type_where_clause
{
fn fmt(&self, f: &mut ::fayalite::__std::fmt::Formatter<'_>) -> ::fayalite::__std::fmt::Result {
#debug_type_body
}
}
#[automatically_derived]
impl #fixed_type_impl_generics ::fayalite::ty::Type for #type_struct_ident #fixed_type_type_generics
#fixed_type_where_clause
{
type CanonicalType = ::fayalite::enum_::DynEnumType;
type Value = #target #fixed_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 #fixed_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 #fixed_type_impl_generics ::fayalite::enum_::EnumType for #type_struct_ident #fixed_type_type_generics
#fixed_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 #fixed_type_impl_generics ::fayalite::expr::ToExpr for #target #fixed_type_type_generics
#fixed_type_where_clause
{
type Type = #type_struct_ident #fixed_type_type_generics;
fn ty(&self) -> <Self as ::fayalite::expr::ToExpr>::Type {
::fayalite::ty::FixedType::fixed_type()
}
fn to_expr(&self) -> ::fayalite::expr::Expr<Self> {
::fayalite::expr::Expr::from_value(self)
}
}
#[automatically_derived]
impl #fixed_type_impl_generics ::fayalite::ty::Value for #target #fixed_type_type_generics
#fixed_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 #fixed_type_impl_generics ::fayalite::enum_::EnumValue for #target #fixed_type_type_generics
#fixed_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)
}

709
crates/fayalite-proc-macros-impl/src/value_derive_struct.rs Normal file
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@ -0,0 +1,709 @@
// 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),
FixedType(fixed_type),
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: _,
fixed_type,
connect_inexact,
} = &options.body;
let ValueDeriveGenerics {
generics,
fixed_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 fixed_type.is_some() {
let (impl_generics, type_generics, where_clause) = fixed_type_generics.split_for_impl();
quote! {
#[automatically_derived]
impl #impl_generics ::fayalite::ty::FixedType for #type_struct_ident #type_generics
#where_clause
{
fn fixed_type() -> Self {
Self {
#(#unskipped_field_names: ::fayalite::ty::FixedType::fixed_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)
}

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# SPDX-License-Identifier: LGPL-3.0-or-later
# See Notices.txt for copyright information
[package]
name = "fayalite-proc-macros"
version = "0.1.0"
edition = "2021"
workspace = "../.."
license = "LGPL-3.0-or-later"
[lib]
proc-macro = true
[dependencies]
fayalite-proc-macros-impl = { version = "=0.1.0", path = "../fayalite-proc-macros-impl" }

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// SPDX-License-Identifier: LGPL-3.0-or-later
// See Notices.txt for copyright information
#[proc_macro_attribute]
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()) {
Ok(retval) => retval.into(),
Err(err) => err.into_compile_error().into(),
}
}
#[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()) {
Ok(retval) => retval.into(),
Err(err) => err.into_compile_error().into(),
}
}

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crates/fayalite-visit-gen/Cargo.toml Normal file
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# SPDX-License-Identifier: LGPL-3.0-or-later
# See Notices.txt for copyright information
[package]
name = "fayalite-visit-gen"
version = "0.1.0"
edition = "2021"
workspace = "../.."
license = "LGPL-3.0-or-later"
[dependencies]
indexmap = { version = "2.2.6", features = ["serde"] }
prettyplease = "0.2.20"
proc-macro2 = "1.0.83"
quote = "1.0.36"
serde = { version = "1.0.202", features = ["derive"] }
serde_json = { version = "1.0.117", features = ["preserve_order"] }
syn = { version = "2.0.66", features = ["full", "extra-traits"] }
thiserror = "1.0.61"

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// SPDX-License-Identifier: LGPL-3.0-or-later
// See Notices.txt for copyright information
use indexmap::IndexMap;
use proc_macro2::{Span, TokenStream};
use quote::{IdentFragment, ToTokens, TokenStreamExt};
use serde::{Deserialize, Serialize};
use std::{
fmt::{self, Write},
iter::FusedIterator,
str::FromStr,
};
use thiserror::Error;
macro_rules! impl_try_from_str {
($ty:ty) => {
impl TryFrom<&'_ str> for $ty {
type Error = <Self as FromStr>::Err;
fn try_from(v: &str) -> Result<Self, Self::Error> {
v.parse()
}
}
impl TryFrom<String> for $ty {
type Error = <Self as FromStr>::Err;
fn try_from(v: String) -> Result<Self, Self::Error> {
v.parse()
}
}
};
}
#[derive(Clone, Debug, PartialEq, Eq, PartialOrd, Ord, Serialize, Deserialize, Hash)]
#[serde(into = "String", try_from = "String")]
pub struct Ident(pub String);
impl ToTokens for Ident {
fn to_tokens(&self, tokens: &mut TokenStream) {
syn::Ident::from(self).to_tokens(tokens);
}
}
impl IdentFragment for Ident {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
f.write_str(&self.0)
}
}
impl Ident {
pub fn is_start_char(ch: char) -> bool {
ch == '_' || ch.is_ascii_alphabetic()
}
pub fn is_continue_char(ch: char) -> bool {
ch == '_' || ch.is_ascii_alphanumeric()
}
pub fn is_ident(v: &str) -> bool {
!v.is_empty()
&& v.starts_with(Self::is_start_char)
&& v.trim_start_matches(Self::is_continue_char).is_empty()
}
}
impl From<Ident> for Path {
fn from(value: Ident) -> Self {
Path(value.0)
}
}
impl From<Ident> for String {
fn from(value: Ident) -> Self {
value.0
}
}
impl From<Ident> for syn::Ident {
fn from(value: Ident) -> Self {
From::from(&value)
}
}
impl From<&'_ Ident> for syn::Ident {
fn from(value: &Ident) -> Self {
syn::Ident::new(&value.0, Span::call_site())
}
}
#[derive(Clone, Debug, Error)]
#[error("invalid identifier")]
pub struct IdentParseError;
impl_try_from_str!(Ident);
impl FromStr for Ident {
type Err = IdentParseError;
fn from_str(s: &str) -> Result<Self, Self::Err> {
if Self::is_ident(s) {
Ok(Self(s.into()))
} else {
Err(IdentParseError)
}
}
}
#[derive(Clone, Debug, PartialEq, Eq, PartialOrd, Ord, Serialize, Deserialize, Hash)]
#[serde(into = "String", try_from = "String")]
pub struct Path(String);
impl Path {
pub fn iter(&self) -> PathIter<'_> {
PathIter(&self.0)
}
pub fn last(&self) -> Ident {
self.iter().next_back().unwrap()
}
pub fn is_path(s: &str) -> bool {
if s.is_empty() {
false
} else {
s.split("::").all(Ident::is_ident)
}
}
}
#[derive(Debug, Clone)]
pub struct PathIter<'a>(&'a str);
impl Iterator for PathIter<'_> {
type Item = Ident;
fn next(&mut self) -> Option<Self::Item> {
if self.0.is_empty() {
None
} else if let Some((first, rest)) = self.0.split_once("::") {
self.0 = rest;
Some(Ident(first.into()))
} else {
let retval = self.0;
self.0 = &self.0[..0];
Some(Ident(retval.into()))
}
}
fn last(mut self) -> Option<Self::Item> {
self.next_back()
}
}
impl FusedIterator for PathIter<'_> {}
impl DoubleEndedIterator for PathIter<'_> {
fn next_back(&mut self) -> Option<Self::Item> {
if self.0.is_empty() {
None
} else if let Some((rest, last)) = self.0.rsplit_once("::") {
self.0 = rest;
Some(Ident(last.into()))
} else {
let retval = self.0;
self.0 = &self.0[..0];
Some(Ident(retval.into()))
}
}
}
impl ToTokens for Path {
fn to_tokens(&self, tokens: &mut TokenStream) {
tokens.append_separated(self.iter(), <syn::Token![::]>::default());
}
}
#[derive(Clone, Debug, Error)]
#[error("invalid path")]
pub struct PathParseError;
impl From<Path> for String {
fn from(value: Path) -> Self {
value.0
}
}
impl_try_from_str!(Path);
impl FromStr for Path {
type Err = PathParseError;
fn from_str(value: &str) -> Result<Self, Self::Err> {
if value.is_empty() {
Err(PathParseError)
} else if value.split("::").all(Ident::is_ident) {
Ok(Self(value.into()))
} else {
Err(PathParseError)
}
}
}
#[derive(Clone, Debug, PartialEq, Eq, Serialize, Deserialize)]
pub struct Definitions {
pub types: std::collections::BTreeMap<Path, Definition>,
}
#[derive(Clone, Debug, PartialEq, Eq, Serialize, Deserialize)]
pub struct Definition {
#[serde(default, skip_serializing_if = "Option::is_none")]
pub fn_name_suffix: Option<Ident>,
#[serde(default, skip_serializing_if = "Option::is_none")]
pub generics: Option<Generics>,
#[serde(default, skip_serializing_if = "Option::is_none")]
pub fold_where: Option<WherePredicates>,
#[serde(default, skip_serializing_if = "Option::is_none")]
pub visit_where: Option<WherePredicates>,
pub data: Data,
}
#[derive(Clone, Debug, PartialEq, Eq, Serialize, Deserialize)]
#[serde(tag = "$kind")]
pub enum Data {
ManualImpl,
Opaque,
Enum(Variants),
Struct(Fields),
}
#[derive(Clone, Debug, PartialEq, Eq, PartialOrd, Ord, Serialize, Deserialize, Hash)]
#[serde(into = "String", try_from = "String")]
pub struct FieldNameIdent {
pub ident: Ident,
pub is_getter: bool,
}
impl FieldNameIdent {
pub fn to_member(&self) -> Option<syn::Member> {
let Self {
ref ident,
is_getter,
} = *self;
if is_getter {
None
} else {
Some(syn::Ident::from(ident).into())
}
}
}
impl ToTokens for FieldNameIdent {
fn to_tokens(&self, tokens: &mut TokenStream) {
let Self {
ref ident,
is_getter,
} = *self;
ident.to_tokens(tokens);
if is_getter {
syn::token::Paren::default().surround(tokens, |_| {});
}
}
}
impl From<FieldNameIdent> for String {
fn from(value: FieldNameIdent) -> Self {
let mut retval = value.ident.0;
if value.is_getter {
retval.push_str("()");
}
retval
}
}
#[derive(Clone, Debug, Error)]
#[error("invalid field name")]
pub struct FieldNameParseError;
impl_try_from_str!(FieldNameIdent);
impl FromStr for FieldNameIdent {
type Err = FieldNameParseError;
fn from_str(value: &str) -> Result<Self, Self::Err> {
let ident = value.strip_suffix("()");
let is_getter = ident.is_some();
let ident = ident.unwrap_or(value);
if let Ok(ident) = ident.parse() {
Ok(Self { ident, is_getter })
} else {
Err(FieldNameParseError)
}
}
}
#[derive(Clone, Debug, PartialEq, Eq, Serialize, Deserialize, Default, Hash)]
#[serde(into = "String", try_from = "String")]
pub struct WherePredicates(pub syn::punctuated::Punctuated<syn::WherePredicate, syn::Token![,]>);
#[derive(Debug, Error)]
#[error("invalid `where` predicates")]
pub struct WherePredicatesParseError;
impl_try_from_str!(WherePredicates);
impl FromStr for WherePredicates {
type Err = WherePredicatesParseError;
fn from_str(value: &str) -> Result<Self, Self::Err> {
Ok(Self(
syn::parse::Parser::parse_str(syn::punctuated::Punctuated::parse_terminated, value)
.map_err(|_| WherePredicatesParseError)?,
))
}
}
impl From<WherePredicates> for String {
fn from(value: WherePredicates) -> Self {
value.0.into_token_stream().to_string()
}
}
impl From<WherePredicates> for syn::WhereClause {
fn from(value: WherePredicates) -> Self {
syn::WhereClause {
where_token: Default::default(),
predicates: value.0,
}
}
}
impl From<syn::WhereClause> for WherePredicates {
fn from(value: syn::WhereClause) -> Self {
Self(value.predicates)
}
}
impl ToTokens for WherePredicates {
fn to_tokens(&self, tokens: &mut TokenStream) {
self.0.to_tokens(tokens);
}
}
#[derive(Serialize, Deserialize)]
#[serde(untagged)]
enum SerializedGenerics {
Where {
generics: String,
#[serde(rename = "where")]
where_predicates: WherePredicates,
},
NoWhere(String),
}
#[derive(Clone, Debug, PartialEq, Eq, Serialize, Deserialize, Default, Hash)]
#[serde(into = "SerializedGenerics", try_from = "SerializedGenerics")]
pub struct Generics(pub syn::Generics);
impl ToTokens for Generics {
fn to_tokens(&self, tokens: &mut TokenStream) {
self.0.to_tokens(tokens);
}
}
impl From<Generics> for SerializedGenerics {
fn from(mut value: Generics) -> Self {
match value.0.where_clause.take() {
Some(where_clause) => Self::Where {
generics: value.0.into_token_stream().to_string(),
where_predicates: where_clause.into(),
},
None => Self::NoWhere(value.0.into_token_stream().to_string()),
}
}
}
#[derive(Debug, Error)]
#[error("invalid generics")]
pub struct GenericsParseError;
impl TryFrom<SerializedGenerics> for Generics {
type Error = GenericsParseError;
fn try_from(value: SerializedGenerics) -> Result<Self, Self::Error> {
let (generics, where_clause) = match value {
SerializedGenerics::Where {
generics,
where_predicates,
} => (generics, Some(where_predicates.into())),
SerializedGenerics::NoWhere(generics) => (generics, None),
};
let Ok(mut generics) = syn::parse_str::<syn::Generics>(&generics) else {
return Err(GenericsParseError);
};
generics.where_clause = where_clause;
Ok(Self(generics))
}
}
#[derive(Clone, Debug, PartialEq, Eq, Serialize, Deserialize, Hash)]
#[serde(into = "String", try_from = "String")]
pub struct PathWithGenerics {
pub path: Path,
pub generics: Option<syn::AngleBracketedGenericArguments>,
}
impl ToTokens for PathWithGenerics {
fn to_tokens(&self, tokens: &mut TokenStream) {
let Self { path, generics } = self;
path.to_tokens(tokens);
if let Some(generics) = generics {
<syn::Token![::]>::default().to_tokens(tokens);
generics.to_tokens(tokens);
}
}
}
impl From<PathWithGenerics> for String {
fn from(value: PathWithGenerics) -> Self {
let PathWithGenerics { path, generics } = value;
let mut retval = String::from(path);
if let Some(generics) = generics {
write!(retval, "{}", generics.to_token_stream()).unwrap();
}
retval
}
}
#[derive(Clone, Debug, Error)]
#[error("invalid path with optional generics")]
pub struct PathWithGenericsParseError;
impl_try_from_str!(PathWithGenerics);
impl FromStr for PathWithGenerics {
type Err = PathWithGenericsParseError;
fn from_str(value: &str) -> Result<Self, Self::Err> {
let (path, generics) = if let Some(lt_pos) = value.find('<') {
let (path, generics) = value.split_at(lt_pos);
let path = path.strip_suffix("::").unwrap_or(path);
match syn::parse_str(generics) {
Ok(generics) => (path, Some(generics)),
Err(_) => return Err(PathWithGenericsParseError),
}
} else {
(value, None)
};
if let Ok(path) = path.parse() {
Ok(Self { path, generics })
} else {
Err(PathWithGenericsParseError)
}
}
}
#[derive(Clone, Debug, PartialEq, Eq, PartialOrd, Ord, Serialize, Deserialize, Hash)]
#[serde(into = "String", try_from = "String")]
pub enum FieldName {
Index(usize),
Ident(FieldNameIdent),
}
impl FieldName {
pub fn to_member(&self) -> Option<syn::Member> {
match self {
&FieldName::Index(index) => Some(index.into()),
FieldName::Ident(ident) => ident.to_member(),
}
}
}
impl ToTokens for FieldName {
fn to_tokens(&self, tokens: &mut TokenStream) {
match self {
&FieldName::Index(index) => syn::Index::from(index).to_tokens(tokens),
FieldName::Ident(ident) => ident.to_tokens(tokens),
}
}
}
impl From<FieldName> for String {
fn from(value: FieldName) -> Self {
match value {
FieldName::Index(index) => index.to_string(),
FieldName::Ident(ident) => ident.into(),
}
}
}
impl_try_from_str!(FieldName);
impl FromStr for FieldName {
type Err = FieldNameParseError;
fn from_str(value: &str) -> Result<Self, Self::Err> {
if !value.is_empty()
&& value
.trim_start_matches(|ch: char| ch.is_ascii_digit())
.is_empty()
{
if let Ok(index) = value.parse() {
Ok(Self::Index(index))
} else {
Err(FieldNameParseError)
}
} else {
value.parse().map(Self::Ident)
}
}
}
#[derive(Clone, Debug, PartialEq, Eq, Serialize, Deserialize)]
pub struct Fields {
#[serde(
default,
rename = "$constructor",
skip_serializing_if = "Option::is_none"
)]
pub constructor: Option<PathWithGenerics>,
#[serde(flatten)]
pub fields: IndexMap<FieldName, Field>,
}
#[derive(Clone, Debug, PartialEq, Eq, Serialize, Deserialize)]
#[serde(transparent)]
pub struct Variants {
pub variants: IndexMap<Ident, Option<Field>>,
}
#[derive(Clone, Debug, PartialEq, Eq, Serialize, Deserialize, Hash)]
pub enum Field {
Opaque,
Visible,
RefVisible,
}
#[cfg(test)]
mod tests {
use crate::ast;
#[test]
fn test_serialize() {
let definitions = ast::Definitions {
types: FromIterator::from_iter([
(
ast::Path("Module".into()),
ast::Definition {
fn_name_suffix: None,
generics: Some(
ast::SerializedGenerics::Where {
generics: "<T: BundleValue>".into(),
where_predicates: "T::Type: BundleType<Value = T>,"
.parse()
.unwrap(),
}
.try_into()
.unwrap(),
),
fold_where: None,
visit_where: None,
data: ast::Data::Struct(ast::Fields {
constructor: Some("Module::new_unchecked".parse().unwrap()),
fields: FromIterator::from_iter([(
"name_id()".parse().unwrap(),
ast::Field::Visible,
)]),
}),
},
),
(
ast::Path("NameId".into()),
ast::Definition {
fn_name_suffix: None,
generics: None,
fold_where: None,
visit_where: None,
data: ast::Data::Struct(ast::Fields {
constructor: None,
fields: FromIterator::from_iter([
("0".try_into().unwrap(), ast::Field::Opaque),
("1".try_into().unwrap(), ast::Field::Opaque),
]),
}),
},
),
]),
};
let definitions_str = serde_json::to_string_pretty(&definitions).unwrap();
println!("{definitions_str}");
assert_eq!(
definitions_str,
r#"{
"types": {
"Module": {
"generics": {
"generics": "< T : BundleValue >",
"where": "T :: Type : BundleType < Value = T > ,"
},
"data": {
"$kind": "Struct",
"$constructor": "Module::new_unchecked",
"name_id()": "Visible"
}
},
"NameId": {
"data": {
"$kind": "Struct",
"0": "Opaque",
"1": "Opaque"
}
}
}
}"#
);
}
}

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// SPDX-License-Identifier: LGPL-3.0-or-later
// See Notices.txt for copyright information
use proc_macro2::{Span, TokenStream};
use quote::{format_ident, quote, ToTokens};
use std::{collections::BTreeMap, fs};
use syn::{fold::Fold, parse_quote};
pub mod ast;
fn map_camel_case_to_snake_case(s: &str) -> String {
#[derive(Clone, Copy, PartialEq, Eq)]
enum State {
Start,
Lowercase,
PushedUpper(char),
}
let mut state = State::Start;
let mut retval = String::new();
for ch in s.chars() {
state = match ch {
'A'..='Z' => {
match state {
State::Start => {}
State::Lowercase => retval.push('_'),
State::PushedUpper(upper) => retval.push(upper.to_ascii_lowercase()),
}
State::PushedUpper(ch)
}
_ => {
match state {
State::PushedUpper(upper) => {
retval.push(upper.to_ascii_lowercase());
}
State::Start | State::Lowercase => {}
}
retval.push(ch);
State::Lowercase
}
};
}
match state {
State::Lowercase | State::Start => {}
State::PushedUpper(upper) => retval.push(upper.to_ascii_lowercase()),
}
retval
}
#[derive(Clone)]
struct DefinitionState {
fn_name_suffix: syn::Ident,
generics: syn::Generics,
fold_generics: syn::Generics,
folder_generics: syn::Generics,
visit_generics: syn::Generics,
visitor_generics: syn::Generics,
}
impl DefinitionState {
fn folder_fn_name(&self) -> syn::Ident {
format_ident!("fold_{}", self.fn_name_suffix)
}
fn visitor_fn_name(&self) -> syn::Ident {
format_ident!("visit_{}", self.fn_name_suffix)
}
fn folder_fn(&self, path: &ast::Path) -> TokenStream {
let folder_fn_name = self.folder_fn_name();
let (impl_generics, type_generics, where_clause) = self.folder_generics.split_for_impl();
quote! {
fn #folder_fn_name #impl_generics(&mut self, v: #path #type_generics) -> Result<#path #type_generics, Self::Error> #where_clause {
Fold::default_fold(v, self)
}
}
}
fn visitor_fn(&self, path: &ast::Path) -> TokenStream {
let visitor_fn_name = self.visitor_fn_name();
let (impl_generics, type_generics, where_clause) = self.visitor_generics.split_for_impl();
quote! {
fn #visitor_fn_name #impl_generics(&mut self, v: &#path #type_generics) -> Result<(), Self::Error> #where_clause {
Visit::default_visit(v, self)
}
}
}
fn fold_impl(&self, path: &ast::Path, body: impl ToTokens) -> TokenStream {
let folder_fn_name = self.folder_fn_name();
let (_, self_type_generics, _) = self.generics.split_for_impl();
let (trait_impl_generics, _, trait_where_clause) = self.fold_generics.split_for_impl();
quote! {
#[automatically_derived]
#[allow(clippy::init_numbered_fields)]
impl #trait_impl_generics Fold<State> for #path #self_type_generics #trait_where_clause {
fn fold(self, state: &mut State) -> Result<Self, State::Error> {
state.#folder_fn_name(self)
}
fn default_fold(self, state: &mut State) -> Result<Self, State::Error> {
#body
}
}
}
}
fn visit_impl(&self, path: &ast::Path, body: impl ToTokens) -> TokenStream {
let visitor_fn_name = self.visitor_fn_name();
let (_, self_type_generics, _) = self.generics.split_for_impl();
let (trait_impl_generics, _, trait_where_clause) = self.visit_generics.split_for_impl();
quote! {
#[automatically_derived]
impl #trait_impl_generics Visit<State> for #path #self_type_generics #trait_where_clause {
fn visit(&self, state: &mut State) -> Result<(), State::Error> {
state.#visitor_fn_name(self)
}
fn default_visit(&self, state: &mut State) -> Result<(), State::Error> {
#body
}
}
}
}
}
struct GenerateState<'a> {
def_states: BTreeMap<&'a ast::Path, DefinitionState>,
definitions: &'a ast::Definitions,
}
struct MapStateToSelf;
impl syn::fold::Fold for MapStateToSelf {
fn fold_ident(&mut self, i: syn::Ident) -> syn::Ident {
if i == "State" {
syn::Ident::new("Self", i.span())
} else {
i
}
}
}
impl<'a> GenerateState<'a> {
fn make_definition_state(&mut self, path: &'a ast::Path) -> syn::Result<()> {
let ast::Definition {
fn_name_suffix,
generics,
fold_where,
visit_where,
data: _,
} = self.definitions.types.get(path).ok_or_else(|| {
syn::Error::new(
Span::call_site(),
format!("can't find named type: {path:?}"),
)
})?;
let fn_name_suffix = fn_name_suffix
.as_ref()
.map(syn::Ident::from)
.unwrap_or_else(|| format_ident!("{}", map_camel_case_to_snake_case(&path.last().0)));
let generics = generics.clone().map(|v| v.0).unwrap_or_default();
let mut fold_generics = generics.clone();
let mut folder_generics = generics.clone();
fold_generics
.params
.insert(0, parse_quote! {State: ?Sized + Folder});
if let Some(fold_where) = fold_where {
fold_generics
.make_where_clause()
.predicates
.extend(fold_where.0.iter().cloned());
folder_generics.make_where_clause().predicates.extend(
fold_where
.0
.iter()
.cloned()
.map(|v| MapStateToSelf.fold_where_predicate(v)),
);
}
let mut visit_generics = generics.clone();
let mut visitor_generics = generics.clone();
visit_generics
.params
.insert(0, parse_quote! {State: ?Sized + Visitor});
if let Some(visit_where) = visit_where {
visit_generics
.make_where_clause()
.predicates
.extend(visit_where.0.iter().cloned());
visitor_generics.make_where_clause().predicates.extend(
visit_where
.0
.iter()
.cloned()
.map(|v| MapStateToSelf.fold_where_predicate(v)),
);
}
self.def_states.insert(
path,
DefinitionState {
fn_name_suffix,
generics,
fold_generics,
folder_generics,
visit_generics,
visitor_generics,
},
);
Ok(())
}
fn new(ast: &'a ast::Definitions) -> syn::Result<Self> {
let mut retval = GenerateState {
def_states: BTreeMap::new(),
definitions: ast,
};
let ast::Definitions { types } = ast;
for path in types.keys() {
retval.make_definition_state(path)?;
}
Ok(retval)
}
}
pub fn generate(ast: &ast::Definitions) -> syn::Result<String> {
let state = GenerateState::new(ast)?;
let mut visitor_fns = vec![];
let mut visit_impls = vec![];
let mut folder_fns = vec![];
let mut fold_impls = vec![];
for (&def_path, def_state) in state.def_states.iter() {
folder_fns.push(def_state.folder_fn(def_path));
visitor_fns.push(def_state.visitor_fn(def_path));
let fold_body;
let visit_body;
let ast::Definition {
fn_name_suffix: _,
generics: _,
fold_where: _,
visit_where: _,
data,
} = ast.types.get(def_path).unwrap();
match data {
ast::Data::ManualImpl => {
continue;
}
ast::Data::Opaque => {
fold_body = quote! {
let _ = state;
Ok(self)
};
visit_body = quote! {
let _ = state;
Ok(())
};
}
ast::Data::Struct(ast::Fields {
constructor,
fields,
}) => {
let mut visit_members = vec![];
let mut fold_members = vec![];
for (field_name, field) in fields {
let fold_member_name = if constructor.is_some() {
None
} else {
let member = field_name.to_member();
if member.is_none() {
return Err(syn::Error::new(Span::call_site(), format!("struct must have `$constructor` since it contains a non-plain field: {def_path:?} {field_name:?}")));
}
member
};
let fold_member_name = fold_member_name.as_slice();
let fold_member = match field {
ast::Field::Opaque => {
quote! {
#(#fold_member_name:)* self.#field_name
}
}
ast::Field::Visible => {
visit_members.push(quote! {
Visit::visit(&self.#field_name, state)?;
});
quote! {
#(#fold_member_name:)* Fold::fold(self.#field_name, state)?
}
}
ast::Field::RefVisible => {
visit_members.push(quote! {
Visit::visit(self.#field_name, state)?;
});
quote! {
#(#fold_member_name:)* Fold::fold(self.#field_name.clone(), state)?
}
}
};
fold_members.push(fold_member);
}
let match_members = constructor
.is_none()
.then(|| {
fields
.keys()
.map(|k| k.to_member())
.collect::<Option<Vec<_>>>()
.map(|members| {
if members.is_empty() {
quote! {
let _ = state;
let Self {} = self;
}
} else {
quote! {
let Self {
#(#members: _,)*
} = self;
}
}
})
})
.flatten();
visit_body = quote! {
#match_members
#(#visit_members)*
Ok(())
};
let fold_body_tail = if let Some(constructor) = constructor {
quote! {
Ok(#constructor(#(#fold_members),*))
}
} else {
quote! {
Ok(Self {
#(#fold_members,)*
})
}
};
fold_body = quote! {
#match_members
#fold_body_tail
};
}
ast::Data::Enum(ast::Variants { variants }) => {
let mut fold_arms = vec![];
let mut visit_arms = vec![];
let mut state_unused = true;
for (variant_name, variant_field) in variants {
let fold_arm;
let visit_arm;
match variant_field {
Some(ast::Field::Visible) => {
state_unused = false;
fold_arm = quote! {
Self::#variant_name(v) => Fold::fold(v, state).map(Self::#variant_name),
};
visit_arm = quote! {
Self::#variant_name(v) => Visit::visit(v, state),
};
}
Some(ast::Field::RefVisible) => {
return Err(syn::Error::new(
Span::call_site(),
"enum variant field must not be RefVisible",
));
}
Some(ast::Field::Opaque) => {
fold_arm = quote! {
Self::#variant_name(_) => Ok(self),
};
visit_arm = quote! {
Self::#variant_name(_) => Ok(()),
};
}
None => {
fold_arm = quote! {
Self::#variant_name => Ok(self),
};
visit_arm = quote! {
Self::#variant_name => Ok(()),
};
}
}
fold_arms.push(fold_arm);
visit_arms.push(visit_arm);
}
let ignore_state = state_unused.then(|| {
quote! {
let _ = state;
}
});
visit_body = quote! {
#ignore_state
match self {
#(#visit_arms)*
}
};
fold_body = quote! {
#ignore_state
match self {
#(#fold_arms)*
}
};
}
}
fold_impls.push(def_state.fold_impl(def_path, fold_body));
visit_impls.push(def_state.visit_impl(def_path, visit_body));
}
Ok(prettyplease::unparse(&parse_quote! {
pub trait Visitor {
type Error;
#(#visitor_fns)*
}
#(#visit_impls)*
pub trait Folder {
type Error;
#(#folder_fns)*
}
#(#fold_impls)*
}))
}
pub fn error_at_call_site<T: std::fmt::Display>(e: T) -> syn::Error {
syn::Error::new(Span::call_site(), e)
}
pub fn parse_and_generate(path: impl AsRef<std::path::Path>) -> syn::Result<String> {
let input = fs::read_to_string(path).map_err(error_at_call_site)?;
let ast: ast::Definitions = serde_json::from_str(&input).map_err(error_at_call_site)?;
generate(&ast)
}

24
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# SPDX-License-Identifier: LGPL-3.0-or-later
# See Notices.txt for copyright information
[package]
name = "fayalite"
version = "0.1.0"
edition = "2021"
workspace = "../.."
license = "LGPL-3.0-or-later"
[dependencies]
bitvec = { version = "1.0.1", features = ["serde"] }
hashbrown = "0.14.3"
num-bigint = "0.4.4"
num-traits = "0.2.16"
paste = "1.0.14"
fayalite-proc-macros = { version = "=0.1.0", path = "../fayalite-proc-macros" }
serde = { version = "1.0.202", features = ["derive"] }
serde_json = "1.0.117"
[dev-dependencies]
trybuild = "1.0"
[build-dependencies]
fayalite-visit-gen = { version = "=0.1.0", path = "../fayalite-visit-gen" }

15
crates/fayalite/build.rs Normal file
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// SPDX-License-Identifier: LGPL-3.0-or-later
// See Notices.txt for copyright information
use fayalite_visit_gen::parse_and_generate;
use std::{env, fs, path::Path};
fn main() {
let path = "visit_types.json";
println!("cargo::rerun-if-changed={path}");
println!("cargo::rerun-if-changed=build.rs");
let generated = parse_and_generate(path).map_err(|e| panic!("{e}")).unwrap();
let out_dir = env::var_os("OUT_DIR").unwrap();
let out_path = Path::new(&out_dir).join("visit.rs");
fs::write(&out_path, generated).unwrap();
// println!("cargo::warning=generated {}", out_path.display());
}

196
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// SPDX-License-Identifier: LGPL-3.0-or-later
// See Notices.txt for copyright information
use crate::{
expr::Target,
intern::{Intern, Interned},
};
use serde::{Deserialize, Serialize};
use std::{
fmt,
hash::{Hash, Hasher},
ops::Deref,
};
#[derive(Clone)]
struct CustomFirrtlAnnotationFieldsImpl {
value: serde_json::Map<String, serde_json::Value>,
serialized: Interned<str>,
}
impl Hash for CustomFirrtlAnnotationFieldsImpl {
fn hash<H: Hasher>(&self, state: &mut H) {
self.serialized.hash(state);
}
}
impl Eq for CustomFirrtlAnnotationFieldsImpl {}
impl PartialEq for CustomFirrtlAnnotationFieldsImpl {
fn eq(&self, other: &Self) -> bool {
self.serialized == other.serialized
}
}
#[derive(Copy, Clone, PartialEq, Eq, Hash)]
pub struct CustomFirrtlAnnotationFields(Interned<CustomFirrtlAnnotationFieldsImpl>);
impl fmt::Debug for CustomFirrtlAnnotationFields {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
self.0.value.fmt(f)
}
}
impl<'de> Deserialize<'de> for CustomFirrtlAnnotationFields {
fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
where
D: serde::Deserializer<'de>,
{
serde_json::Map::<String, serde_json::Value>::deserialize(deserializer).map(Self::from)
}
}
impl Serialize for CustomFirrtlAnnotationFields {
fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
where
S: serde::Serializer,
{
self.0.value.serialize(serializer)
}
}
impl Deref for CustomFirrtlAnnotationFields {
type Target = serde_json::Map<String, serde_json::Value>;
fn deref(&self) -> &Self::Target {
&self.0.value
}
}
impl From<serde_json::Map<String, serde_json::Value>> for CustomFirrtlAnnotationFields {
fn from(value: serde_json::Map<String, serde_json::Value>) -> Self {
let serialized =
serde_json::to_string(&value).expect("serialization of JSON should succeed");
Self(Intern::intern_sized(CustomFirrtlAnnotationFieldsImpl {
value,
serialized: Intern::intern_owned(serialized),
}))
}
}
#[derive(Debug, Clone)]
pub struct NotAJsonObject(pub serde_json::Value);
impl fmt::Display for NotAJsonObject {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
f.write_str("not a JSON object")
}
}
impl std::error::Error for NotAJsonObject {}
impl TryFrom<serde_json::Value> for CustomFirrtlAnnotationFields {
type Error = NotAJsonObject;
fn try_from(value: serde_json::Value) -> Result<Self, Self::Error> {
match value {
serde_json::Value::Object(value) => Ok(value.into()),
_ => Err(NotAJsonObject(value)),
}
}
}
impl From<CustomFirrtlAnnotationFields> for serde_json::Map<String, serde_json::Value> {
fn from(value: CustomFirrtlAnnotationFields) -> Self {
Self::clone(&value)
}
}
impl From<CustomFirrtlAnnotationFields> for serde_json::Value {
fn from(value: CustomFirrtlAnnotationFields) -> Self {
serde_json::Value::Object(value.into())
}
}
#[derive(Copy, Clone, PartialEq, Eq, Debug, Hash, Serialize, Deserialize)]
pub struct CustomFirrtlAnnotation {
pub class: Interned<str>,
#[serde(flatten)]
pub additional_fields: CustomFirrtlAnnotationFields,
}
#[derive(Clone, PartialEq, Eq, Hash, Debug)]
#[non_exhaustive]
pub enum Annotation {
DontTouch,
CustomFirrtl(CustomFirrtlAnnotation),
}
#[derive(Clone, PartialEq, Eq, Hash, Debug)]
pub struct TargetedAnnotation {
target: Interned<Target>,
annotation: Annotation,
}
impl TargetedAnnotation {
#[track_caller]
pub fn new(target: Interned<Target>, annotation: Annotation) -> Self {
Self::assert_valid_target(target);
Self { target, annotation }
}
#[track_caller]
pub fn assert_valid_target(target: Interned<Target>) {
assert!(target.is_static(), "can't annotate non-static targets");
}
pub fn target(&self) -> Interned<Target> {
self.target
}
pub fn annotation(&self) -> &Annotation {
&self.annotation
}
}
pub trait IntoAnnotations {
type IntoAnnotations: IntoIterator<Item = Annotation>;
fn into_annotations(self) -> Self::IntoAnnotations;
}
impl IntoAnnotations for Annotation {
type IntoAnnotations = [Annotation; 1];
fn into_annotations(self) -> Self::IntoAnnotations {
[self]
}
}
impl IntoAnnotations for Box<Annotation> {
type IntoAnnotations = [Annotation; 1];
fn into_annotations(self) -> Self::IntoAnnotations {
[*self]
}
}
impl IntoAnnotations for &'_ Annotation {
type IntoAnnotations = [Annotation; 1];
fn into_annotations(self) -> Self::IntoAnnotations {
[self.clone()]
}
}
impl IntoAnnotations for &'_ mut Annotation {
type IntoAnnotations = [Annotation; 1];
fn into_annotations(self) -> Self::IntoAnnotations {
[self.clone()]
}
}
impl<T: IntoIterator<Item = Annotation>> IntoAnnotations for T {
type IntoAnnotations = Self;
fn into_annotations(self) -> Self::IntoAnnotations {
self
}
}

729
crates/fayalite/src/array.rs Normal file
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// 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,
},
source_location::SourceLocation,
ty::{
CanonicalType, CanonicalTypeKind, CanonicalValue, Connect, DynCanonicalType,
DynCanonicalValue, DynType, DynValueTrait, FixedType, MatchVariantWithoutScope, Type,
TypeEnum, Value, ValueEnum,
},
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,
};
mod sealed {
pub trait Sealed {}
}
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 IsFixedLen: 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 IsFixedLen = 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, const N: usize> sealed::Sealed for [T; N] {}
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 IsFixedLen = ConstBool<true>;
const FIXED_LEN_TYPE: Option<Self::LenType> = Some(());
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");
};
ArrayType {
element,
len,
bit_width,
}
}
}
impl<VA: ValueArrayOrSlice + ?Sized, State: ?Sized + Folder> Fold<State> for ArrayType<VA>
where
VA::ElementType: Fold<State>,
{
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))
}
}
impl<VA: ValueArrayOrSlice + ?Sized, State: ?Sized + Visitor> Visit<State> for ArrayType<VA>
where
VA::ElementType: Visit<State>,
{
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)
}
}
impl<V: Value, const N: usize> ArrayType<[V; N]>
where
V::Type: Type<Value = V>,
{
pub fn new_array(element: V::Type) -> Self {
ArrayType::new_with_len_type(element, ())
}
}
impl<V: Value, const N: usize> FixedType for ArrayType<[V; N]>
where
V::Type: FixedType<Value = V>,
{
fn fixed_type() -> Self {
Self::new_array(FixedType::fixed_type())
}
}
impl<V: Value> ArrayType<[V]>
where
V::Type: Type<Value = 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;
type MatchActiveScope = ();
type MatchVariantAndInactiveScope = MatchVariantWithoutScope<VA::Match>;
type MatchVariantsIter = std::iter::Once<Self::MatchVariantAndInactiveScope>;
fn match_variants<IO: BundleValue>(
this: Expr<Self::Value>,
module_builder: &mut ModuleBuilder<IO, NormalModule>,
source_location: SourceLocation,
) -> Self::MatchVariantsIter
where
IO::Type: BundleType<Value = IO>,
{
let _ = module_builder;
let _ = source_location;
std::iter::once(MatchVariantWithoutScope(VA::make_match(this)))
}
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)
}
fn canonical(&self) -> Self::CanonicalType {
ArrayType {
element: self.element.canonical_dyn(),
len: self.len(),
bit_width: self.bit_width,
}
}
fn source_location(&self) -> 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<Lhs: ValueArrayOrSlice + ?Sized, Rhs: ValueArrayOrSlice + ?Sized> Connect<ArrayType<Rhs>>
for ArrayType<Lhs>
{
}
impl CanonicalType for ArrayType<[DynCanonicalValue]> {
const CANONICAL_TYPE_KIND: CanonicalTypeKind = CanonicalTypeKind::ArrayType;
}
#[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(),
}
}
}
impl<VA: ValueArrayOrSlice + ?Sized> ToExpr for Array<VA> {
type Type = ArrayType<VA>;
fn ty(&self) -> Self::Type {
ArrayType::new_with_len_type(self.element_ty.clone(), self.value.len_type())
}
fn to_expr(&self) -> Expr<<Self::Type as Type>::Value> {
Expr::from_value(self)
}
}
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>
where
VA::ElementType: FixedType,
{
fn from(value: T) -> Self {
Self::new(FixedType::fixed_type(), value.into())
}
}
impl<E: ToExpr<Type = T>, T: FixedType> ToExpr for [E] {
type Type = ArrayType<[T::Value]>;
fn ty(&self) -> Self::Type {
ArrayType::new_with_len_type(FixedType::fixed_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: FixedType> 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: FixedType> ToExpr for [E; 0] {
type Type = ArrayType<[T::Value; 0]>;