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Use impl's def id when calculating type to specify UFCS

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This commit is contained in:
Michael Goulet 2022-11-12 19:42:06 +00:00
parent ba64ba8b0d
commit ae60015e76
6 changed files with 68 additions and 4 deletions
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9
compiler/rustc_trait_selection/src/traits/error_reporting/mod.rs
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@ -2290,14 +2290,15 @@ impl<'tcx> InferCtxtPrivExt<'tcx> for TypeErrCtxt<'_, 'tcx> {
let trait_impls = self.tcx.trait_impls_of(data.trait_ref.def_id);
if trait_impls.blanket_impls().is_empty()
&& let Some((impl_ty, _)) = trait_impls.non_blanket_impls().iter().next()
&& let Some(impl_def_id) = impl_ty.def() {
let message = if trait_impls.non_blanket_impls().len() == 1 {
&& let Some(impl_def_id) = trait_impls.non_blanket_impls().values().flatten().next()
{
let non_blanket_impl_count = trait_impls.non_blanket_impls().values().flatten().count();
let message = if non_blanket_impl_count == 1 {
"use the fully-qualified path to the only available implementation".to_string()
} else {
format!(
"use a fully-qualified path to a specific available implementation ({} found)",
trait_impls.non_blanket_impls().len()
non_blanket_impl_count
)
};
let mut suggestions = vec![(