make FromIterator use IntoIterator

This breaks all implementors of FromIterator, as they must now accept IntoIterator instead of Iterator. The fix for this is generally trivial (change the bound, and maybe call into_iter() on the argument to get the old argument).

Users of FromIterator should be unaffected because Iterators are IntoIterator.

[breaking-change]

2 files changed, 4 insertions, 4 deletions

diff --git a/src/libsyntax/owned_slice.rs b/src/libsyntax/owned_slice.rs
index 0f9a56baa17..f5201d4a8bc 100644
--- a/src/libsyntax/owned_slice.rs
+++ b/src/libsyntax/owned_slice.rs
@@ -10,7 +10,7 @@
 
 use std::default::Default;
 use std::fmt;
-use std::iter::FromIterator;
+use std::iter::{IntoIterator, FromIterator};
 use std::ops::Deref;
 use std::vec;
 use serialize::{Encodable, Decodable, Encoder, Decoder};
@@ -77,8 +77,8 @@ impl<T: Clone> Clone for OwnedSlice<T> {
 }
 
 impl<T> FromIterator<T> for OwnedSlice<T> {
-    fn from_iter<I: Iterator<Item=T>>(iter: I) -> OwnedSlice<T> {
-        OwnedSlice::from_vec(iter.collect())
+    fn from_iter<I: IntoIterator<Item=T>>(iter: I) -> OwnedSlice<T> {
+        OwnedSlice::from_vec(iter.into_iter().collect())
     }
 }
 
diff --git a/src/libsyntax/util/small_vector.rs b/src/libsyntax/util/small_vector.rs
index 6a1fb4008ad..0a39d380904 100644
--- a/src/libsyntax/util/small_vector.rs
+++ b/src/libsyntax/util/small_vector.rs
@@ -30,7 +30,7 @@ enum SmallVectorRepr<T> {
 }
 
 impl<T> FromIterator<T> for SmallVector<T> {
-    fn from_iter<I: Iterator<Item=T>>(iter: I) -> SmallVector<T> {
+    fn from_iter<I: IntoIterator<Item=T>>(iter: I) -> SmallVector<T> {
         let mut v = SmallVector::zero();
         v.extend(iter);
         v