Rename Bitwise::population_count to Bitwise::count_ones and add Bitwise::count_zeros

These are inspired by the [functions in the Julia standard library](http://docs.julialang.org/en/release-0.2/stdlib/base/#Base.count_ones).

1 files changed, 1 insertions, 1 deletions

diff --git a/src/libextra/enum_set.rs b/src/libextra/enum_set.rs
index a17e807b6ee..d036f2c70d7 100644
--- a/src/libextra/enum_set.rs
+++ b/src/libextra/enum_set.rs
@@ -129,7 +129,7 @@ impl<E:CLike> Iterator<E> for Items<E> {
     }
 
     fn size_hint(&self) -> (uint, Option<uint>) {
-        let exact = self.bits.population_count();
+        let exact = self.bits.count_ones();
         (exact, Some(exact))
     }
 }