bjoernager/rust
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compiler: fold by value

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This commit is contained in:
Bastian Kauschke 2020-10-24 02:21:18 +02:00
parent 3ec6720bf1
commit 2bf93bd852
140 changed files with 679 additions and 699 deletions
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16
compiler/rustc_macros/src/type_foldable.rs
View file

@ -6,6 +6,12 @@ pub fn type_foldable_derive(mut s: synstructure::Structure<'_>) -> proc_macro2::
}
s.add_bounds(synstructure::AddBounds::Generics);
let body_visit = s.each(|bind| {
quote! {
::rustc_middle::ty::fold::TypeFoldable::visit_with(#bind, __folder)?;
}
});
s.bind_with(|_| synstructure::BindStyle::Move);
let body_fold = s.each_variant(|vi| {
let bindings = vi.bindings();
vi.construct(|_, index| {
@ -16,20 +22,14 @@ pub fn type_foldable_derive(mut s: synstructure::Structure<'_>) -> proc_macro2::
})
});
let body_visit = s.each(|bind| {
quote! {
::rustc_middle::ty::fold::TypeFoldable::visit_with(#bind, __folder)?;
}
});
s.bound_impl(
quote!(::rustc_middle::ty::fold::TypeFoldable<'tcx>),
quote! {
fn super_fold_with<__F: ::rustc_middle::ty::fold::TypeFolder<'tcx>>(
&self,
self,
__folder: &mut __F
) -> Self {
match *self { #body_fold }
match self { #body_fold }
}
fn super_visit_with<__F: ::rustc_middle::ty::fold::TypeVisitor<'tcx>>(