bjoernager/rust
bjoernager/rust
1
Fork 0
Code Activity

Implement #[define_opaque] attribute for functions.

Browse source
This commit is contained in:
Oli Scherer 2024-07-26 10:04:02 +00:00 • committed by Oli Scherer
parent 2c6a12ec44
commit cb4751d4b8
653 changed files with 2911 additions and 2580 deletions
Download patch file Download diff file Expand all files Collapse all files

27
compiler/rustc_trait_selection/src/error_reporting/infer/note_and_explain.rs
View file

@ -395,11 +395,28 @@ impl<T> Trait<T> for X {
let sp = tcx
.def_ident_span(body_owner_def_id)
.unwrap_or_else(|| tcx.def_span(body_owner_def_id));
diag.span_note(
sp,
"this item must have the opaque type in its signature in order to \
be able to register hidden types",
);
let mut alias_def_id = opaque_ty.def_id;
while let DefKind::OpaqueTy = tcx.def_kind(alias_def_id) {
alias_def_id = tcx.parent(alias_def_id);
}
let opaque_path = tcx.def_path_str(alias_def_id);
// FIXME(type_alias_impl_trait): make this a structured suggestion
match tcx.opaque_ty_origin(opaque_ty.def_id) {
rustc_hir::OpaqueTyOrigin::FnReturn { .. } => {}
rustc_hir::OpaqueTyOrigin::AsyncFn { .. } => {}
rustc_hir::OpaqueTyOrigin::TyAlias {
in_assoc_ty: false, ..
} => {
diag.span_note(
sp,
format!("this item must have a `#[define_opaque({opaque_path})]` \
attribute to be able to define hidden types"),
);
}
rustc_hir::OpaqueTyOrigin::TyAlias {
in_assoc_ty: true, ..
} => {}
}
}
// If two if arms can be coerced to a trait object, provide a structured
// suggestion.