Merge pull request #89 from wyhaya/impl_display

Implement the Display trait for BitVec

src/lib.rs

@@ -117,7 +117,7 @@ use alloc::vec::Vec;
 use core::cell::RefCell;
 use core::cmp;
 use core::cmp::Ordering;
-use core::fmt;
+use core::fmt::{self, Write};
 use core::hash;
 use core::iter::repeat;
 use core::iter::FromIterator;
@@ -1695,6 +1695,16 @@ impl<B: BitBlock> Ord for BitVec<B> {
     }
 }
 
+impl<B: BitBlock> fmt::Display for BitVec<B> {
+    fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
+        self.ensure_invariant();
+        for bit in self {
+            fmt.write_char(if bit { '1' } else { '0' })?;
+        }
+        Ok(())
+    }
+}
+
 impl<B: BitBlock> fmt::Debug for BitVec<B> {
     fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
         self.ensure_invariant();