diff options
| -rw-r--r-- | compiler/rustc_resolve/src/diagnostics.rs | 38 | ||||
| -rw-r--r-- | tests/ui/macros/expand-full-no-resolution.stderr | 4 | ||||
| -rw-r--r-- | tests/ui/suggestions/silenced-binding-typo.stderr | 4 |
3 files changed, 29 insertions, 17 deletions
diff --git a/compiler/rustc_resolve/src/diagnostics.rs b/compiler/rustc_resolve/src/diagnostics.rs index 856cfbc01e8..d1541527cf5 100644 --- a/compiler/rustc_resolve/src/diagnostics.rs +++ b/compiler/rustc_resolve/src/diagnostics.rs @@ -1562,6 +1562,9 @@ impl<'a, 'tcx> Resolver<'a, 'tcx> { Some(suggestion) if suggestion.candidate == kw::Underscore => return false, Some(suggestion) => suggestion, }; + + let mut did_label_def_span = false; + if let Some(def_span) = suggestion.res.opt_def_id().map(|def_id| self.def_span(def_id)) { if span.overlaps(def_span) { // Don't suggest typo suggestion for itself like in the following: @@ -1595,31 +1598,38 @@ impl<'a, 'tcx> Resolver<'a, 'tcx> { errors::DefinedHere::SingleItem { span, candidate_descr, candidate } } }; + did_label_def_span = true; err.subdiagnostic(self.tcx.dcx(), label); } - let (span, sugg, post) = if let SuggestionTarget::SimilarlyNamed = suggestion.target + let (span, msg, sugg) = if let SuggestionTarget::SimilarlyNamed = suggestion.target && let Ok(snippet) = self.tcx.sess.source_map().span_to_snippet(span) && let Some(span) = suggestion.span && let Some(candidate) = suggestion.candidate.as_str().strip_prefix('_') && snippet == candidate { + let candidate = suggestion.candidate; // When the suggested binding change would be from `x` to `_x`, suggest changing the // original binding definition instead. (#60164) - let post = format!(", consider renaming `{}` into `{snippet}`", suggestion.candidate); - (span, snippet, post) - } else { - (span, suggestion.candidate.to_ident_string(), String::new()) - }; - let msg = match suggestion.target { - SuggestionTarget::SimilarlyNamed => format!( - "{} {} with a similar name exists{post}", - suggestion.res.article(), - suggestion.res.descr() - ), - SuggestionTarget::SingleItem => { - format!("maybe you meant this {}", suggestion.res.descr()) + let msg = format!( + "the leading underscore in `{candidate}` marks it as unused, consider renaming it to `{snippet}`" + ); + if !did_label_def_span { + err.span_label(span, format!("`{candidate}` defined here")); } + (span, msg, snippet) + } else { + let msg = match suggestion.target { + SuggestionTarget::SimilarlyNamed => format!( + "{} {} with a similar name exists", + suggestion.res.article(), + suggestion.res.descr() + ), + SuggestionTarget::SingleItem => { + format!("maybe you meant this {}", suggestion.res.descr()) + } + }; + (span, msg, suggestion.candidate.to_ident_string()) }; err.span_suggestion(span, msg, sugg, Applicability::MaybeIncorrect); true diff --git a/tests/ui/macros/expand-full-no-resolution.stderr b/tests/ui/macros/expand-full-no-resolution.stderr index 2537a5032a9..df6f20332bf 100644 --- a/tests/ui/macros/expand-full-no-resolution.stderr +++ b/tests/ui/macros/expand-full-no-resolution.stderr @@ -7,7 +7,7 @@ LL | macro_rules! _a { LL | format_args!(a!()); | ^ | -help: a macro with a similar name exists, consider renaming `_a` into `a` +help: the leading underscore in `_a` marks it as unused, consider renaming it to `a` | LL | macro_rules! a { | ~ @@ -21,7 +21,7 @@ LL | macro_rules! _a { LL | env!(a!()); | ^ | -help: a macro with a similar name exists, consider renaming `_a` into `a` +help: the leading underscore in `_a` marks it as unused, consider renaming it to `a` | LL | macro_rules! a { | ~ diff --git a/tests/ui/suggestions/silenced-binding-typo.stderr b/tests/ui/suggestions/silenced-binding-typo.stderr index c362d00c713..a1e8b9e30d4 100644 --- a/tests/ui/suggestions/silenced-binding-typo.stderr +++ b/tests/ui/suggestions/silenced-binding-typo.stderr @@ -1,10 +1,12 @@ error[E0425]: cannot find value `x` in this scope --> $DIR/silenced-binding-typo.rs:4:14 | +LL | let _x = 42; + | -- `_x` defined here LL | let _y = x; | ^ | -help: a local variable with a similar name exists, consider renaming `_x` into `x` +help: the leading underscore in `_x` marks it as unused, consider renaming it to `x` | LL | let x = 42; | ~ |