Implement size_hint() for ByRef iterator

Palmer Cox · “Palmer · commit 765bc9064f9b · 2013-12-20T20:40:16.000-05:00
diff --git a/src/libstd/iter.rs b/src/libstd/iter.rs
@@ -795,7 +795,8 @@ pub struct ByRef<'a, T> {
 impl<'a, A, T: Iterator<A>> Iterator<A> for ByRef<'a, T> {
     #[inline]
     fn next(&mut self) -> Option<A> { self.iter.next() }
-    // FIXME: #9629 we cannot implement &self methods like size_hint on ByRef
+    #[inline]
+    fn size_hint(&self) -> (uint, Option<uint>) { self.iter.size_hint() }
 }
 
 impl<'a, A, T: DoubleEndedIterator<A>> DoubleEndedIterator<A> for ByRef<'a, T> {

Original file line number	Diff line number	Diff line change
`@@ -795,7 +795,8 @@ pub struct ByRef<'a, T> {`
`795`	`795`	`impl<'a, A, T: Iterator<A>> Iterator<A> for ByRef<'a, T> {`
`796`	`796`	`#[inline]`
`797`	`797`	`fn next(&mut self) -> Option<A> { self.iter.next() }`
`798`		`- // FIXME: #9629 we cannot implement &self methods like size_hint on ByRef`
	`798`	`+ #[inline]`
	`799`	`+ fn size_hint(&self) -> (uint, Option<uint>) { self.iter.size_hint() }`
`799`	`800`	`}`
`800`	`801`
`801`	`802`	`impl<'a, A, T: DoubleEndedIterator<A>> DoubleEndedIterator<A> for ByRef<'a, T> {`