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Do not insert impl_trait_in_bindings opaque definitions twice.

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This commit is contained in:
Camille GILLOT 2021-03-14 20:02:35 +01:00
parent 178bd9130e
commit 3612953487
1 changed files with 15 additions and 38 deletions
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53
compiler/rustc_ast_lowering/src/lib.rs
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@ -1788,14 +1788,7 @@ impl<'a, 'hir> LoweringContext<'a, 'hir> {
)
}
fn lower_local(&mut self, l: &Local) -> (hir::Local<'hir>, SmallVec<[NodeId; 1]>) {
let mut ids = SmallVec::<[NodeId; 1]>::new();
if self.sess.features_untracked().impl_trait_in_bindings {
if let Some(ref ty) = l.ty {
let mut visitor = ImplTraitTypeIdVisitor { ids: &mut ids };
visitor.visit_ty(ty);
}
}
fn lower_local(&mut self, l: &Local) -> hir::Local<'hir> {
let ty = l.ty.as_ref().map(|t| {
let mut capturable_lifetimes;
self.lower_ty(
@ -1814,17 +1807,14 @@ impl<'a, 'hir> LoweringContext<'a, 'hir> {
let init = l.init.as_ref().map(|e| self.lower_expr(e));
let hir_id = self.lower_node_id(l.id);
self.lower_attrs(hir_id, &l.attrs);
(
hir::Local {
hir_id,
ty,
pat: self.lower_pat(&l.pat),
init,
span: l.span,
source: hir::LocalSource::Normal,
},
ids,
)
hir::Local {
hir_id,
ty,
pat: self.lower_pat(&l.pat),
init,
span: l.span,
source: hir::LocalSource::Normal,
}
}
fn lower_fn_params_to_names(&mut self, decl: &FnDecl) -> &'hir [Ident] {
@ -2438,27 +2428,14 @@ impl<'a, 'hir> LoweringContext<'a, 'hir> {
fn lower_stmt(&mut self, s: &Stmt) -> SmallVec<[hir::Stmt<'hir>; 1]> {
let (hir_id, kind) = match s.kind {
StmtKind::Local(ref l) => {
let (l, item_ids) = self.lower_local(l);
let mut ids: SmallVec<[hir::Stmt<'hir>; 1]> = item_ids
.into_iter()
.map(|item_id| {
let item_id = hir::ItemId {
// All the items that `lower_local` finds are `impl Trait` types.
def_id: self.lower_node_id(item_id).expect_owner(),
};
self.stmt(s.span, hir::StmtKind::Item(item_id))
})
.collect();
let l = self.lower_local(l);
let hir_id = self.lower_node_id(s.id);
self.alias_attrs(hir_id, l.hir_id);
ids.push({
hir::Stmt {
hir_id,
kind: hir::StmtKind::Local(self.arena.alloc(l)),
span: s.span,
}
});
return ids;
return smallvec![hir::Stmt {
hir_id,
kind: hir::StmtKind::Local(self.arena.alloc(l)),
span: s.span,
}];
}
StmtKind::Item(ref it) => {
// Can only use the ID once.