clean up some clippy warnings

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

@@ -58,8 +58,7 @@ impl ParsedBundle {
         }
         *mutability = FieldMutability::None;
         colon_token.get_or_insert(Token![:](ident.span()));
-        let options = errors.unwrap_or_default(HdlAttr::parse_and_take_attr(attrs));
-        options
+        errors.unwrap_or_default(HdlAttr::parse_and_take_attr(attrs))
     }
     fn parse(item: ItemStruct) -> syn::Result<Self> {
         let ItemStruct {

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

@@ -600,7 +600,7 @@ impl ToTokens for ParsedEnum {
                 static_generics.split_for_impl();
             let static_type_body_variants =
                 Vec::from_iter(variants.iter().map(|ParsedVariant { ident, field, .. }| {
-                    if let Some(_) = field {
+                    if field.is_some() {
                         quote_spanned! {span=>
                             #ident: ::fayalite::ty::StaticType::TYPE,
                         }

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

@@ -1410,7 +1410,7 @@ impl ParseTypes<Path> for ParsedType {
         let mut args = None;
         let segments = Punctuated::from_iter(segments.pairs_mut().map_pair_value_mut(|segment| {
             let PathSegment { ident, arguments } = segment;
-            if let Some(_) = args {
+            if args.is_some() {
                 parser
                     .errors()
                     .error(&ident, "associated types/consts are not yet implemented");
@@ -1594,7 +1594,7 @@ impl ParseTypes<Path> for ParsedConstGenericType {
         let mut args = None;
         let segments = Punctuated::from_iter(segments.pairs_mut().map_pair_value_mut(|segment| {
             let PathSegment { ident, arguments } = segment;
-            if let Some(_) = args {
+            if args.is_some() {
                 parser
                     .errors()
                     .error(&ident, "associated types/consts are not yet implemented");
@@ -3554,7 +3554,7 @@ impl SplitForImpl for Generics {
         Self::TypeGenerics<'_>,
         Self::WhereClause<'_>,
     ) {
-        Generics::split_for_impl(&self)
+        Generics::split_for_impl(self)
     }
 }
 

crates/fayalite/src/bundle.rs

@@ -144,6 +144,12 @@ impl BundleTypePropertiesBuilder {
     }
 }
 
+impl Default for BundleTypePropertiesBuilder {
+    fn default() -> Self {
+        Self::new()
+    }
+}
+
 impl Bundle {
     #[track_caller]
     pub fn new(fields: Interned<[BundleField]>) -> Self {
@@ -342,6 +348,7 @@ macro_rules! impl_tuples {
                 std::iter::once(MatchVariantWithoutScope(($(Expr::field(this, stringify!($num)),)*)))
             }
             fn mask_type(&self) -> Self::MaskType {
+                #![allow(clippy::unused_unit)]
                 let ($($var,)*) = self;
                 ($($var.mask_type(),)*)
             }
@@ -350,6 +357,7 @@ macro_rules! impl_tuples {
             }
             #[track_caller]
             fn from_canonical(canonical_type: CanonicalType) -> Self {
+                #![allow(clippy::unused_unit)]
                 let CanonicalType::Bundle(bundle) = canonical_type else {
                     panic!("expected bundle");
                 };
@@ -358,7 +366,7 @@ macro_rules! impl_tuples {
                 };
                 $(let BundleField { name, flipped, ty } = $var;
                 assert_eq!(&*name, stringify!($num));
-                assert_eq!(flipped, false);
+                assert!(!flipped);
                 let $var = $T::from_canonical(ty);)*
                 ($($var,)*)
             }

crates/fayalite/src/enum_.rs

@@ -169,6 +169,12 @@ impl EnumTypePropertiesBuilder {
     }
 }
 
+impl Default for EnumTypePropertiesBuilder {
+    fn default() -> Self {
+        Self::new()
+    }
+}
+
 impl Enum {
     #[track_caller]
     pub fn new(variants: Interned<[EnumVariant]>) -> Self {
@@ -399,9 +405,8 @@ impl<T: Type> HdlOption<T> {
         else {
             unreachable!();
         };
-        let value = f(value).map_err(|e| {
+        let value = f(value).inspect_err(|_| {
             and_then_out.complete(()); // avoid error
-            e
         })?;
         let and_then_out = and_then_out.complete(Expr::ty(value));
         connect(and_then_out, value);

crates/fayalite/src/int.rs

@@ -147,7 +147,7 @@ where
 
     fn try_from_usize(v: usize) -> Option<Self::SizeType> {
         if v == VALUE {
-            Some(Self::SizeType::default())
+            Some(ConstUsize)
         } else {
             None
         }
@@ -560,7 +560,7 @@ pub trait BoolOrIntType: Type + sealed::BoolOrIntTypeSealed {
     }
     fn bits_to_expr(bits: Cow<'_, BitSlice>) -> Expr<Self>;
     fn le_bytes_to_expr_wrapping(bytes: &[u8], bit_width: usize) -> Expr<Self> {
-        let bitslice = BitSlice::<u8, Lsb0>::from_slice(&bytes);
+        let bitslice = BitSlice::<u8, Lsb0>::from_slice(bytes);
         let bitslice = &bitslice[..bit_width.min(bitslice.len())];
         let mut bits = BitVec::new();
         bits.extend_from_bitslice(bitslice);

crates/fayalite/src/memory.rs

@@ -634,7 +634,7 @@ impl<Element: Type, Len: Size> Mem<Element, Len> {
         self.0.source_location
     }
     pub fn array_type(self) -> ArrayType<Element, Len> {
-        self.0.array_type.clone()
+        self.0.array_type
     }
     pub fn initial_value(self) -> Option<Interned<BitSlice>> {
         self.0.initial_value
@@ -987,7 +987,7 @@ impl<Element: Type, Len: Size> MemBuilder<Element, Len> {
     #[allow(clippy::result_unit_err)]
     pub fn get_array_type(&self) -> Result<ArrayType<Element, Len>, ()> {
         Ok(ArrayType::new(
-            self.mem_element_type.clone(),
+            self.mem_element_type,
             Len::from_usize(self.get_depth()?),
         ))
     }

crates/fayalite/src/module.rs

@@ -607,6 +607,10 @@ impl BlockStack {
 pub struct Id(NonZeroU64);
 
 impl Id {
+    #[allow(
+        clippy::new_without_default,
+        reason = "returns a different value each time, so there isn't really a default value"
+    )]
     pub fn new() -> Self {
         static NEXT_ID: AtomicU64 = AtomicU64::new(1);
         Self(
@@ -945,7 +949,7 @@ impl From<NormalModuleBody<ModuleBuilding>> for NormalModuleBody {
                     Stmt::Declaration(decl) => {
                         let annotations = annotations_map
                             .remove(&decl)
-                            .map(|v| Intern::intern_owned(v))
+                            .map(Intern::intern_owned)
                             .unwrap_or_default();
                         match decl {
                             StmtDeclaration::Wire(StmtWire {
@@ -1615,10 +1619,7 @@ impl AssertValidityState {
         let module = self.module;
         if block == 0 {
             for module_io in &*module.module_io {
-                self.insert_new_base(
-                    TargetBase::intern_sized(module_io.module_io.clone().into()),
-                    block,
-                );
+                self.insert_new_base(TargetBase::intern_sized(module_io.module_io.into()), block);
             }
         }
         let Block { memories, stmts } = self.blocks[block];
@@ -1934,7 +1935,7 @@ impl ModuleBuilder {
         let module_io = module_io.canonical();
         let mut impl_ = self.impl_.borrow_mut();
         let impl_ = &mut *impl_;
-        impl_.io_indexes.insert(module_io.clone(), impl_.io.len());
+        impl_.io_indexes.insert(module_io, impl_.io.len());
         impl_.io.push(AnnotatedModuleIO {
             annotations: vec![],
             module_io,
@@ -2478,7 +2479,7 @@ pub fn memory_array_with_loc<Element: Type, Len: Size>(
     mem_array_type: ArrayType<Element, Len>,
     source_location: SourceLocation,
 ) -> MemBuilder<Element, Len> {
-    let mut retval = memory_impl(name, mem_array_type.element().clone(), source_location);
+    let mut retval = memory_impl(name, mem_array_type.element(), source_location);
     retval.depth(mem_array_type.len());
     retval
 }

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

@@ -271,12 +271,12 @@ impl State {
             .into()),
             EnumTypeState::TagUIntAndBody(_) => {
                 let int_tag_expr = Expr::<TagAndBody<UInt, UInt>>::from_canonical(folded_expr).tag;
-                Ok(match_int_tag(int_tag_expr, source_location, &folded_blocks).into())
+                Ok(match_int_tag(int_tag_expr, source_location, folded_blocks).into())
             }
             EnumTypeState::UInt(_) => {
                 let int_tag_expr = Expr::<UInt>::from_canonical(folded_expr)
                     [..unfolded_enum_type.discriminant_bit_width()];
-                Ok(match_int_tag(int_tag_expr, source_location, &folded_blocks).into())
+                Ok(match_int_tag(int_tag_expr, source_location, folded_blocks).into())
             }
             EnumTypeState::Unchanged => Ok(StmtMatch {
                 expr: Expr::from_canonical(folded_expr),
@@ -929,13 +929,10 @@ impl Folder for State {
         unreachable!()
     }
 
-    fn fold_enum_literal<T: EnumType>(
+    fn fold_enum_literal<T: EnumType + Fold<Self>>(
         &mut self,
         _v: ops::EnumLiteral<T>,
-    ) -> Result<ops::EnumLiteral<T>, Self::Error>
-    where
-        T: Fold<Self>,
-    {
+    ) -> Result<ops::EnumLiteral<T>, Self::Error> {
         unreachable!()
     }
 

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

@@ -766,7 +766,7 @@ impl ModuleState {
                     output_stmts.push(
                         StmtWire {
                             annotations: Default::default(),
-                            wire: canonical_wire.clone(),
+                            wire: canonical_wire,
                         }
                         .into(),
                     );

crates/fayalite/src/util/scoped_ref.rs

@@ -106,3 +106,9 @@ impl<T: ?Sized> ScopedRef<T> {
         self.0.with_opt(f)
     }
 }
+
+impl<T: ?Sized> Default for ScopedRef<T> {
+    fn default() -> Self {
+        Self::new()
+    }
+}

crates/fayalite/tests/module.rs

@@ -2258,7 +2258,7 @@ pub fn check_memory_of_bundle() {
     let wmask: (Bool, Bool) = m.input();
     #[hdl]
     let clk: Clock = m.input();
-    let mem_init = Vec::from_iter((0..0x10u8).map(|i| (i ^ 3, (i ^ i / 2).cast_to_static())));
+    let mem_init = Vec::from_iter((0..0x10u8).map(|i| (i ^ 3, (i ^ (i / 2)).cast_to_static())));
     #[hdl]
     let mut mem = memory_with_init(mem_init);
     let read_port = mem.new_read_port();