Retire BraceStructTypeFoldableImpl and TupleStructTypeFoldableImpl.

Author: cjgillot

src/librustc/macros.rs

@@ -324,60 +324,6 @@ macro_rules! EnumLiftImpl {
     };
 }
 
-#[macro_export]
-macro_rules! BraceStructTypeFoldableImpl {
-    (impl<$($p:tt),*> TypeFoldable<$tcx:tt> for $s:path {
-        $($field:ident),* $(,)?
-    } $(where $($wc:tt)*)*) => {
-        impl<$($p),*> $crate::ty::fold::TypeFoldable<$tcx> for $s
-            $(where $($wc)*)*
-        {
-            fn super_fold_with<V: $crate::ty::fold::TypeFolder<$tcx>>(
-                &self,
-                folder: &mut V,
-            ) -> Self {
-                let $s { $($field,)* } = self;
-                $s { $($field: $crate::ty::fold::TypeFoldable::fold_with($field, folder),)* }
-            }
-
-            fn super_visit_with<V: $crate::ty::fold::TypeVisitor<$tcx>>(
-                &self,
-                visitor: &mut V,
-            ) -> bool {
-                let $s { $($field,)* } = self;
-                false $(|| $crate::ty::fold::TypeFoldable::visit_with($field, visitor))*
-            }
-        }
-    };
-}
-
-#[macro_export]
-macro_rules! TupleStructTypeFoldableImpl {
-    (impl<$($p:tt),*> TypeFoldable<$tcx:tt> for $s:path {
-        $($field:ident),* $(,)?
-    } $(where $($wc:tt)*)*) => {
-        impl<$($p),*> $crate::ty::fold::TypeFoldable<$tcx> for $s
-            $(where $($wc)*)*
-        {
-            fn super_fold_with<V: $crate::ty::fold::TypeFolder<$tcx>>(
-                &self,
-                folder: &mut V,
-            ) -> Self {
-                let $s($($field,)*)= self;
-                $s($($crate::ty::fold::TypeFoldable::fold_with($field, folder),)*)
-            }
-
-            fn super_visit_with<V: $crate::ty::fold::TypeVisitor<$tcx>>(
-                &self,
-                visitor: &mut V,
-            ) -> bool {
-                let $s($($field,)*) = self;
-                false $(|| $crate::ty::fold::TypeFoldable::visit_with($field, visitor))*
-            }
-        }
-    };
-}
-
 #[macro_export]
 macro_rules! EnumTypeFoldableImpl {
     (impl<$($p:tt),*> TypeFoldable<$tcx:tt> for $s:path {

src/librustc/ty/fold.rs

@@ -42,8 +42,7 @@ use crate::util::nodemap::FxHashSet;
 /// This trait is implemented for every type that can be folded.
 /// Basically, every type that has a corresponding method in `TypeFolder`.
 ///
-/// To implement this conveniently, use the
-/// `BraceStructTypeFoldableImpl` etc macros found in `macros.rs`.
+/// To implement this conveniently, use the derive macro located in librustc_macros.
 pub trait TypeFoldable<'tcx>: fmt::Debug + Clone {
     fn super_fold_with<F: TypeFolder<'tcx>>(&self, folder: &mut F) -> Self;
     fn fold_with<F: TypeFolder<'tcx>>(&self, folder: &mut F) -> Self {