diff options
| -rw-r--r-- | src/librustc_typeck/check/method/suggest.rs | 16 |
1 files changed, 15 insertions, 1 deletions
diff --git a/src/librustc_typeck/check/method/suggest.rs b/src/librustc_typeck/check/method/suggest.rs index 2d4d2e32f23..e68e3211cad 100644 --- a/src/librustc_typeck/check/method/suggest.rs +++ b/src/librustc_typeck/check/method/suggest.rs @@ -518,7 +518,21 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> { } } - if let Some(lev_candidate) = lev_candidate { + fn is_str_ref<'tcx>(ty: Ty<'tcx>) -> bool { + match ty.sty { + ty::Str => true, + ty::Ref(_, ty, _) => is_str_ref(&ty), + _ => false, + } + } + if item_name.as_str() == "as_str" && is_str_ref(&actual) { + err.span_suggestion( + span, + "try to remove `as_str`", + String::new(), + Applicability::MaybeIncorrect, + ); + } else if let Some(lev_candidate) = lev_candidate { let def_kind = lev_candidate.def_kind(); err.span_suggestion( span, |