bjoernager/rust
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Stabilize GATs

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This commit is contained in:
Jack Huey 2022-05-04 10:22:19 -04:00
parent 02654a0844
commit 3cf0e98dc9
280 changed files with 313 additions and 808 deletions
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22
compiler/rustc_ast_passes/src/feature_gate.rs
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@ -342,25 +342,6 @@ impl<'a> PostExpansionVisitor<'a> {
}
}
fn check_gat(&self, generics: &ast::Generics, span: Span) {
if !generics.params.is_empty() {
gate_feature_post!(
&self,
generic_associated_types,
span,
"generic associated types are unstable"
);
}
if !generics.where_clause.predicates.is_empty() {
gate_feature_post!(
&self,
generic_associated_types,
span,
"where clauses on associated types are unstable"
);
}
}
/// Feature gate `impl Trait` inside `type Alias = $type_expr;`.
fn check_impl_trait(&self, ty: &ast::Ty) {
struct ImplTraitVisitor<'a> {
@ -719,7 +700,7 @@ impl<'a> Visitor<'a> for PostExpansionVisitor<'a> {
fn visit_assoc_item(&mut self, i: &'a ast::AssocItem, ctxt: AssocCtxt) {
let is_fn = match i.kind {
ast::AssocItemKind::Fn(_) => true,
ast::AssocItemKind::TyAlias(box ast::TyAlias { ref generics, ref ty, .. }) => {
ast::AssocItemKind::TyAlias(box ast::TyAlias { ref ty, .. }) => {
if let (Some(_), AssocCtxt::Trait) = (ty, ctxt) {
gate_feature_post!(
&self,
@ -731,7 +712,6 @@ impl<'a> Visitor<'a> for PostExpansionVisitor<'a> {
if let Some(ty) = ty {
self.check_impl_trait(ty);
}
self.check_gat(generics, i.span);
false
}
_ => false,