diff options
Diffstat (limited to '')
| -rw-r--r-- | compiler/rustc_passes/src/liveness.rs | 65 |
1 files changed, 23 insertions, 42 deletions
diff --git a/compiler/rustc_passes/src/liveness.rs b/compiler/rustc_passes/src/liveness.rs index 6a4cd79cd..c6fe40f72 100644 --- a/compiler/rustc_passes/src/liveness.rs +++ b/compiler/rustc_passes/src/liveness.rs @@ -1319,14 +1319,14 @@ impl<'a, 'tcx> Liveness<'a, 'tcx> { // that we do not emit the same warning twice if the uninhabited type // is indeed `!`. + let msg = format!("unreachable {}", descr); self.ir.tcx.struct_span_lint_hir( lint::builtin::UNREACHABLE_CODE, expr_id, expr_span, - |lint| { - let msg = format!("unreachable {}", descr); - lint.build(&msg) - .span_label(expr_span, &msg) + &msg, + |diag| { + diag.span_label(expr_span, &msg) .span_label(orig_span, "any code following this expression is unreachable") .span_note( orig_span, @@ -1335,7 +1335,6 @@ impl<'a, 'tcx> Liveness<'a, 'tcx> { orig_ty ), ) - .emit(); }, ); } @@ -1491,14 +1490,8 @@ impl<'tcx> Liveness<'_, 'tcx> { lint::builtin::UNUSED_ASSIGNMENTS, var_hir_id, vec![span], - |lint| { - lint.build(&format!( - "value captured by `{}` is never read", - name - )) - .help("did you mean to capture by reference instead?") - .emit(); - }, + format!("value captured by `{}` is never read", name), + |lint| lint.help("did you mean to capture by reference instead?"), ); } } @@ -1508,11 +1501,8 @@ impl<'tcx> Liveness<'_, 'tcx> { lint::builtin::UNUSED_VARIABLES, var_hir_id, vec![span], - |lint| { - lint.build(&format!("unused variable: `{}`", name)) - .help("did you mean to capture by reference instead?") - .emit(); - }, + format!("unused variable: `{}`", name), + |lint| lint.help("did you mean to capture by reference instead?"), ); } } @@ -1601,20 +1591,17 @@ impl<'tcx> Liveness<'_, 'tcx> { .into_iter() .map(|(_, _, ident_span)| ident_span) .collect::<Vec<_>>(), - |lint| { - lint.build(&format!("variable `{}` is assigned to, but never used", name)) - .note(&format!("consider using `_{}` instead", name)) - .emit(); - }, + format!("variable `{}` is assigned to, but never used", name), + |lint| lint.note(&format!("consider using `_{}` instead", name)), ) } else if can_remove { self.ir.tcx.struct_span_lint_hir( lint::builtin::UNUSED_VARIABLES, first_hir_id, hir_ids_and_spans.iter().map(|(_, pat_span, _)| *pat_span).collect::<Vec<_>>(), + format!("unused variable: `{}`", name), |lint| { - let mut err = lint.build(&format!("unused variable: `{}`", name)); - err.multipart_suggestion( + lint.multipart_suggestion( "try removing the field", hir_ids_and_spans .iter() @@ -1629,8 +1616,7 @@ impl<'tcx> Liveness<'_, 'tcx> { }) .collect(), Applicability::MachineApplicable, - ); - err.emit(); + ) }, ); } else { @@ -1661,14 +1647,13 @@ impl<'tcx> Liveness<'_, 'tcx> { .iter() .map(|(_, pat_span, _)| *pat_span) .collect::<Vec<_>>(), + format!("unused variable: `{}`", name), |lint| { - let mut err = lint.build(&format!("unused variable: `{}`", name)); - err.multipart_suggestion( + lint.multipart_suggestion( "try ignoring the field", shorthands, Applicability::MachineApplicable, - ); - err.emit(); + ) }, ); } else { @@ -1684,17 +1669,16 @@ impl<'tcx> Liveness<'_, 'tcx> { .iter() .map(|(_, _, ident_span)| *ident_span) .collect::<Vec<_>>(), + format!("unused variable: `{}`", name), |lint| { - let mut err = lint.build(&format!("unused variable: `{}`", name)); - if self.has_added_lit_match_name_span(&name, opt_body, &mut err) { - err.span_label(pat.span, "unused variable"); + if self.has_added_lit_match_name_span(&name, opt_body, lint) { + lint.span_label(pat.span, "unused variable"); } - err.multipart_suggestion( + lint.multipart_suggestion( "if this is intentional, prefix it with an underscore", non_shorthands, Applicability::MachineApplicable, - ); - err.emit(); + ) }, ); } @@ -1758,11 +1742,8 @@ impl<'tcx> Liveness<'_, 'tcx> { lint::builtin::UNUSED_ASSIGNMENTS, hir_id, spans, - |lint| { - lint.build(&message(&name)) - .help("maybe it is overwritten before being read?") - .emit(); - }, + message(&name), + |lint| lint.help("maybe it is overwritten before being read?"), ) } } |