bjoernager/rust
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tighten span slightly for synthetic item

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This commit is contained in:
Michael Goulet 2023-07-27 22:20:32 +00:00
parent 0ae0643a53
commit bf38111ac1
2 changed files with 12 additions and 4 deletions
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12
compiler/rustc_ty_utils/src/assoc.rs
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@ -346,8 +346,16 @@ fn associated_type_for_impl_trait_in_impl(
) -> LocalDefId {
let impl_local_def_id = tcx.local_parent(impl_fn_def_id);
// FIXME fix the span, we probably want the def_id of the return type of the function
let span = tcx.def_span(impl_fn_def_id);
let decl = tcx
.hir()
.find_by_def_id(impl_fn_def_id)
.expect("expected item")
.fn_decl()
.expect("expected decl");
let span = match decl.output {
hir::FnRetTy::DefaultReturn(_) => tcx.def_span(impl_fn_def_id),
hir::FnRetTy::Return(ty) => ty.span,
};
let impl_assoc_ty = tcx.at(span).create_def(impl_local_def_id, DefPathData::ImplTraitAssocTy);
let local_def_id = impl_assoc_ty.def_id();