review comments: use if let

2019-08-29 17:41:41 -07:00 · 2019-08-29 17:41:41 -07:00 · be9e6af65e
commit be9e6af65e
parent d2cb5a8c35
1 changed files with 3 additions and 6 deletions
--- a/src/librustc_mir/hair/pattern/check_match.rs
+++ b/src/librustc_mir/hair/pattern/check_match.rs
@ -429,12 +429,9 @@ fn check_arms<'tcx>(

                        hir::MatchSource::ForLoopDesugar |
                        hir::MatchSource::Normal => {
-                            match pat.kind {
-                                box PatternKind::Range(..) => {
-                                    // Covered in `is_useful() with more context`
-                                    break;
-                                }
-                                _ => {}
+                            if let box PatternKind::Range(..) = pat.kind {
+                                // Covered by `overlapping_patterns` with more context
+                                break;
                            }
                            let mut err = cx.tcx.struct_span_lint_hir(
                                lint::builtin::UNREACHABLE_PATTERNS,