Optimise vec![false; N] to zero-alloc

Nowadays booleans have a well-defined representation, so there is no reason not to optimise their allocation.
rust-lang · Feb 21, 2019 · 9f58c5f · 9f58c5f
1 parent 1349c84
commit 9f58c5f
Showing 1 changed file with 1 addition and 0 deletions.
diff --git a/src/liballoc/vec.rs b/src/liballoc/vec.rs
@@ -1606,6 +1606,7 @@ impl_is_zero!(u64, |x| x == 0);
 impl_is_zero!(u128, |x| x == 0);
 impl_is_zero!(usize, |x| x == 0);
 
+impl_is_zero!(bool, |x| x == false);
 impl_is_zero!(char, |x| x == '\0');
 
 impl_is_zero!(f32, |x: f32| x.to_bits() == 0);