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| author | Oli Scherer <git-spam-no-reply9815368754983@oli-obk.de> | 2024-07-26 10:04:02 +0000 |
|---|---|---|
| committer | Oli Scherer <github333195615777966@oli-obk.de> | 2025-03-11 12:05:02 +0000 |
| commit | cb4751d4b87e1c8ebdeb381abe3785486a59968e (patch) | |
| tree | 7e40c81d8bbec10bd16102231ac20828f7b0f4f6 /compiler/rustc_trait_selection/src | |
| parent | 2c6a12ec44d0426c8939123c2f2cf27d2217de13 (diff) | |
| download | rust-cb4751d4b87e1c8ebdeb381abe3785486a59968e.tar.gz rust-cb4751d4b87e1c8ebdeb381abe3785486a59968e.zip | |
Implement `#[define_opaque]` attribute for functions.
Diffstat (limited to 'compiler/rustc_trait_selection/src')
| -rw-r--r-- | compiler/rustc_trait_selection/src/error_reporting/infer/note_and_explain.rs | 27 |
1 files changed, 22 insertions, 5 deletions
diff --git a/compiler/rustc_trait_selection/src/error_reporting/infer/note_and_explain.rs b/compiler/rustc_trait_selection/src/error_reporting/infer/note_and_explain.rs index 514615735a5..51b2a0b36bb 100644 --- a/compiler/rustc_trait_selection/src/error_reporting/infer/note_and_explain.rs +++ b/compiler/rustc_trait_selection/src/error_reporting/infer/note_and_explain.rs @@ -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. |