Rollup merge of rust-lang#89818 - LingMan:map_or, r=oli-obk

Use Option::map_or instead of open coding it ```@rustbot``` modify labels +C-cleanup +T-compiler
the8472 · Oct 13, 2021 · 67f3a5f · 67f3a5f
2 parents 626dd87 + 7943c9c
commit 67f3a5f
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/compiler/rustc_index/src/bit_set.rs b/compiler/rustc_index/src/bit_set.rs
@@ -841,7 +841,7 @@ impl<T: Idx> GrowableBitSet<T> {
     #[inline]
     pub fn contains(&self, elem: T) -> bool {
         let (word_index, mask) = word_index_and_mask(elem);
-        if let Some(word) = self.bit_set.words.get(word_index) { (word & mask) != 0 } else { false }
+        self.bit_set.words.get(word_index).map_or(false, |word| (word & mask) != 0)
     }
 }