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Do not mention associated items when they introduce an obligation

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This commit is contained in:
Esteban Kuber 2021-10-12 14:18:13 +00:00
parent 446b46673d
commit 563db4245b
102 changed files with 9 additions and 1028 deletions
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12
compiler/rustc_trait_selection/src/traits/error_reporting/suggestions.rs
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@ -1958,15 +1958,9 @@ impl<'a, 'tcx> InferCtxtExt<'tcx> for InferCtxt<'a, 'tcx> {
region, object_ty,
));
}
ObligationCauseCode::ItemObligation(item_def_id) => {
let item_name = tcx.def_path_str(item_def_id);
let msg = format!("required by `{}`", item_name);
let sp = tcx
.hir()
.span_if_local(item_def_id)
.unwrap_or_else(|| tcx.def_span(item_def_id));
let sp = tcx.sess.source_map().guess_head_span(sp);
err.span_note(sp, &msg);
ObligationCauseCode::ItemObligation(_item_def_id) => {
// We hold the `DefId` of the item introducing the obligation, but displaying it
// doesn't add user usable information. It always point at an associated item.
}
ObligationCauseCode::BindingObligation(item_def_id, span) => {
let item_name = tcx.def_path_str(item_def_id);