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make E0277 use short paths

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add note

change wording

short_ty_string on t
This commit is contained in:
Milo 2023-10-14 18:49:51 +00:00
parent 193e8a196b
commit 991bf752f1
1 changed files with 11 additions and 5 deletions
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16
compiler/rustc_trait_selection/src/traits/error_reporting/type_err_ctxt_ext.rs
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@ -429,14 +429,18 @@ impl<'tcx> TypeErrCtxtExt<'tcx> for TypeErrCtxt<'_, 'tcx> {
return;
}
let trait_ref = trait_predicate.to_poly_trait_ref();
let (post_message, pre_message, type_def) = self
let (post_message, pre_message, type_def, file_note) = self
.get_parent_trait_ref(obligation.cause.code())
.map(|(t, s)| {
let (t, file) = self.tcx.short_ty_string(t);
(
format!(" in `{t}`"),
format!("within `{t}`, "),
s.map(|s| (format!("within this `{t}`"), s)),
file.and_then(|file| Some(format!(
"the full trait has been written to '{}'",
file.display(),
)))
)
})
.unwrap_or_default();
@ -544,6 +548,8 @@ impl<'tcx> TypeErrCtxtExt<'tcx> for TypeErrCtxt<'_, 'tcx> {
err.emit();
return;
}
file_note.map(|note| err.note(note));
if let Some(s) = label {
// If it has a custom `#[rustc_on_unimplemented]`
// error message, let's display it as the label!
@ -1077,7 +1083,7 @@ pub(super) trait InferCtxtPrivExt<'tcx> {
fn get_parent_trait_ref(
&self,
code: &ObligationCauseCode<'tcx>,
) -> Option<(String, Option<Span>)>;
) -> Option<(Ty<'tcx>, Option<Span>)>;
/// If the `Self` type of the unsatisfied trait `trait_ref` implements a trait
/// with the same path as `trait_ref`, a help message about
@ -1927,7 +1933,7 @@ impl<'tcx> InferCtxtPrivExt<'tcx> for TypeErrCtxt<'_, 'tcx> {
fn get_parent_trait_ref(
&self,
code: &ObligationCauseCode<'tcx>,
) -> Option<(String, Option<Span>)> {
) -> Option<(Ty<'tcx>, Option<Span>)> {
match code {
ObligationCauseCode::BuiltinDerivedObligation(data) => {
let parent_trait_ref = self.resolve_vars_if_possible(data.parent_trait_pred);
@ -1937,7 +1943,7 @@ impl<'tcx> InferCtxtPrivExt<'tcx> for TypeErrCtxt<'_, 'tcx> {
let ty = parent_trait_ref.skip_binder().self_ty();
let span = TyCategory::from_ty(self.tcx, ty)
.map(|(_, def_id)| self.tcx.def_span(def_id));
Some((ty.to_string(), span))
Some((ty, span))
}
}
}