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Suggest on method signature diff between impl and trait

This commit is contained in:
csmoe 2018-07-25 20:46:10 +08:00
parent 1398572403
commit 20151ca716
1 changed files with 11 additions and 0 deletions
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11
src/librustc_typeck/check/compare_method.rs
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@ -319,6 +319,17 @@ fn compare_predicate_entailment<'a, 'tcx>(tcx: TyCtxt<'a, 'tcx, 'tcx>,
E0053,
"method `{}` has an incompatible type for trait",
trait_m.ident);
if let TypeError::Mutability = terr {
if let Some(trait_err_span) = trait_err_span {
if let Ok(trait_err_str) = tcx.sess.codemap().span_to_snippet(trait_err_span) {
diag.span_suggestion(
impl_err_span,
"consider change the type to match the mutability in trait",
format!("{}", trait_err_str),
);
}
}
}
infcx.note_type_err(&mut diag,
&cause,