bjoernager/rust
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Use Vec::extend, instead of calling Vec::push in a loop

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This commit is contained in:
Michael Howell 2021-11-11 13:56:32 -07:00
parent 3d29b68077
commit b0fd642de6
1 changed files with 1 additions and 3 deletions
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4
compiler/rustc_mir_build/src/thir/pattern/usefulness.rs
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@ -443,9 +443,7 @@ impl<'p, 'tcx> Matrix<'p, 'tcx> {
/// expands it. /// expands it.
fn push(&mut self, row: PatStack<'p, 'tcx>) { fn push(&mut self, row: PatStack<'p, 'tcx>) {
if !row.is_empty() && row.head().is_or_pat() { if !row.is_empty() && row.head().is_or_pat() {
for row in row.expand_or_pat() { self.patterns.extend(row.expand_or_pat());
self.patterns.push(row);
}
} else { } else {
self.patterns.push(row); self.patterns.push(row);
} }