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Implement existential types

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This commit is contained in:
Oliver Schneider
2018-07-03 19:38:14 +02:00
parent 1c84d81873
commit 53d2ebb0ad
182 changed files with 1389 additions and 121 deletions
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7
src/libsyntax/fold.rs
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@@ -912,6 +912,10 @@ pub fn noop_fold_item_kind<T: Folder>(i: ItemKind, folder: &mut T) -> ItemKind {
ItemKind::Ty(t, generics) => {
ItemKind::Ty(folder.fold_ty(t), folder.fold_generics(generics))
}
ItemKind::Existential(bounds, generics) => ItemKind::Existential(
folder.fold_bounds(bounds),
folder.fold_generics(generics),
),
ItemKind::Enum(enum_definition, generics) => {
let generics = folder.fold_generics(generics);
let variants = enum_definition.variants.move_map(|x| folder.fold_variant(x));
@@ -1002,6 +1006,9 @@ pub fn noop_fold_impl_item<T: Folder>(i: ImplItem, folder: &mut T)
folder.fold_block(body))
}
ast::ImplItemKind::Type(ty) => ast::ImplItemKind::Type(folder.fold_ty(ty)),
ast::ImplItemKind::Existential(bounds) => {
ast::ImplItemKind::Existential(folder.fold_bounds(bounds))
},
ast::ImplItemKind::Macro(mac) => ast::ImplItemKind::Macro(folder.fold_mac(mac))
},
span: folder.new_span(i.span),