libs: stabilize iter module

src/libcollections/binary_heap.rs

@@ -585,10 +585,10 @@ impl<T> DoubleEndedIterator<T> for MoveItems<T> {
     fn next_back(&mut self) -> Option<T> { self.iter.next_back() }
 }
 
-impl<T> ExactSize<T> for MoveItems<T> {}
+impl<T> ExactSizeIterator<T> for MoveItems<T> {}
 
 impl<T: Ord> FromIterator<T> for BinaryHeap<T> {
-    fn from_iter<Iter: Iterator<T>>(mut iter: Iter) -> BinaryHeap<T> {
+    fn from_iter<Iter: Iterator<T>>(iter: Iter) -> BinaryHeap<T> {
         let vec: Vec<T> = iter.collect();
         BinaryHeap::from_vec(vec)
     }

src/libcollections/bit.rs

@@ -68,7 +68,7 @@ use core::prelude::*;
 use core::cmp;
 use core::default::Default;
 use core::fmt;
-use core::iter::{Chain, Enumerate, Repeat, Skip, Take};
+use core::iter::{Chain, Enumerate, Repeat, Skip, Take, repeat};
 use core::iter;
 use core::num::Int;
 use core::slice;
@@ -88,11 +88,11 @@ fn match_words <'a,'b>(a: &'a Bitv, b: &'b Bitv) -> (MatchWords<'a>, MatchWords<
 
     // have to uselessly pretend to pad the longer one for type matching
     if a_len < b_len {
-        (a.mask_words(0).chain(Repeat::new(0u32).enumerate().take(b_len).skip(a_len)),
-         b.mask_words(0).chain(Repeat::new(0u32).enumerate().take(0).skip(0)))
+        (a.mask_words(0).chain(repeat(0u32).enumerate().take(b_len).skip(a_len)),
+         b.mask_words(0).chain(repeat(0u32).enumerate().take(0).skip(0)))
     } else {
-        (a.mask_words(0).chain(Repeat::new(0u32).enumerate().take(0).skip(0)),
-         b.mask_words(0).chain(Repeat::new(0u32).enumerate().take(a_len).skip(b_len)))
+        (a.mask_words(0).chain(repeat(0u32).enumerate().take(0).skip(0)),
+         b.mask_words(0).chain(repeat(0u32).enumerate().take(a_len).skip(b_len)))
     }
 }
 
@@ -943,7 +943,7 @@ impl<'a> DoubleEndedIterator<bool> for Bits<'a> {
     }
 }
 
-impl<'a> ExactSize<bool> for Bits<'a> {}
+impl<'a> ExactSizeIterator<bool> for Bits<'a> {}
 
 impl<'a> RandomAccessIterator<bool> for Bits<'a> {
     #[inline]

src/libcollections/btree/map.rs

@@ -863,7 +863,7 @@ impl<K, V, E, T: Traverse<E> + DoubleEndedIterator<TraversalItem<K, V, E>>>
     // Note that the design of these iterators permits an *arbitrary* initial pair of min and max,
     // making these arbitrary sub-range iterators. However the logic to construct these paths
     // efficiently is fairly involved, so this is a FIXME. The sub-range iterators also wouldn't be
-    // able to accurately predict size, so those iterators can't implement ExactSize.
+    // able to accurately predict size, so those iterators can't implement ExactSizeIterator.
     fn next(&mut self) -> Option<(K, V)> {
         loop {
             // We want the smallest element, so try to get the top of the left stack
@@ -963,7 +963,7 @@ impl<'a, K, V> Iterator<(&'a K, &'a V)> for Entries<'a, K, V> {
 impl<'a, K, V> DoubleEndedIterator<(&'a K, &'a V)> for Entries<'a, K, V> {
     fn next_back(&mut self) -> Option<(&'a K, &'a V)> { self.inner.next_back() }
 }
-impl<'a, K, V> ExactSize<(&'a K, &'a V)> for Entries<'a, K, V> {}
+impl<'a, K, V> ExactSizeIterator<(&'a K, &'a V)> for Entries<'a, K, V> {}
 
 
 impl<'a, K, V> Iterator<(&'a K, &'a mut V)> for MutEntries<'a, K, V> {
@@ -973,7 +973,7 @@ impl<'a, K, V> Iterator<(&'a K, &'a mut V)> for MutEntries<'a, K, V> {
 impl<'a, K, V> DoubleEndedIterator<(&'a K, &'a mut V)> for MutEntries<'a, K, V> {
     fn next_back(&mut self) -> Option<(&'a K, &'a mut V)> { self.inner.next_back() }
 }
-impl<'a, K, V> ExactSize<(&'a K, &'a mut V)> for MutEntries<'a, K, V> {}
+impl<'a, K, V> ExactSizeIterator<(&'a K, &'a mut V)> for MutEntries<'a, K, V> {}
 
 
 impl<K, V> Iterator<(K, V)> for MoveEntries<K, V> {
@@ -983,7 +983,7 @@ impl<K, V> Iterator<(K, V)> for MoveEntries<K, V> {
 impl<K, V> DoubleEndedIterator<(K, V)> for MoveEntries<K, V> {
     fn next_back(&mut self) -> Option<(K, V)> { self.inner.next_back() }
 }
-impl<K, V> ExactSize<(K, V)> for MoveEntries<K, V> {}
+impl<K, V> ExactSizeIterator<(K, V)> for MoveEntries<K, V> {}
 
 
 

src/libcollections/dlist.rs

@@ -607,7 +607,7 @@ impl<'a, A> DoubleEndedIterator<&'a A> for Items<'a, A> {
     }
 }
 
-impl<'a, A> ExactSize<&'a A> for Items<'a, A> {}
+impl<'a, A> ExactSizeIterator<&'a A> for Items<'a, A> {}
 
 impl<'a, A> Iterator<&'a mut A> for MutItems<'a, A> {
     #[inline]
@@ -645,7 +645,7 @@ impl<'a, A> DoubleEndedIterator<&'a mut A> for MutItems<'a, A> {
     }
 }
 
-impl<'a, A> ExactSize<&'a mut A> for MutItems<'a, A> {}
+impl<'a, A> ExactSizeIterator<&'a mut A> for MutItems<'a, A> {}
 
 /// Allows mutating a `DList` while iterating.
 pub trait ListInsertion<A> {

src/libcollections/ring_buf.rs

@@ -695,8 +695,7 @@ impl<'a, T> DoubleEndedIterator<&'a T> for Items<'a, T> {
     }
 }
 
-
-impl<'a, T> ExactSize<&'a T> for Items<'a, T> {}
+impl<'a, T> ExactSizeIterator<&'a T> for Items<'a, T> {}
 
 impl<'a, T> RandomAccessIterator<&'a T> for Items<'a, T> {
     #[inline]
@@ -763,7 +762,7 @@ impl<'a, T> DoubleEndedIterator<&'a mut T> for MutItems<'a, T> {
     }
 }
 
-impl<'a, T> ExactSize<&'a mut T> for MutItems<'a, T> {}
+impl<'a, T> ExactSizeIterator<&'a mut T> for MutItems<'a, T> {}
 
 impl<A: PartialEq> PartialEq for RingBuf<A> {
     fn eq(&self, other: &RingBuf<A>) -> bool {
@@ -1322,7 +1321,7 @@ mod tests {
         let u: Vec<int> = deq.iter().map(|&x| x).collect();
         assert_eq!(u, v);
 
-        let mut seq = iter::count(0u, 2).take(256);
+        let seq = iter::count(0u, 2).take(256);
         let deq: RingBuf<uint> = seq.collect();
         for (i, &x) in deq.iter().enumerate() {
             assert_eq!(2*i, x);

src/libcollections/slice.rs

@@ -94,7 +94,7 @@ use core::cmp;
 use core::kinds::Sized;
 use core::mem::size_of;
 use core::mem;
-use core::prelude::{Clone, Greater, Iterator, Less, None, Option};
+use core::prelude::{Clone, Greater, Iterator, IteratorExt, Less, None, Option};
 use core::prelude::{Ord, Ordering, RawPtr, Some, range};
 use core::ptr;
 use core::iter::{range_step, MultiplicativeIterator};

src/libcollections/str.rs

@@ -61,7 +61,7 @@ use core::cmp;
 use core::iter::AdditiveIterator;
 use core::kinds::Sized;
 use core::prelude::{Char, Clone, Eq, Equiv};
-use core::prelude::{Iterator, SlicePrelude, None, Option, Ord, Ordering};
+use core::prelude::{Iterator, IteratorExt, SlicePrelude, None, Option, Ord, Ordering};
 use core::prelude::{PartialEq, PartialOrd, Result, AsSlice, Some, Tuple2};
 use core::prelude::{range};
 
@@ -794,7 +794,7 @@ mod tests {
     use std::cmp::{Equal, Greater, Less, Ord, PartialOrd, Equiv};
     use std::option::{Some, None};
     use std::ptr::RawPtr;
-    use std::iter::{Iterator, DoubleEndedIterator};
+    use std::iter::{Iterator, IteratorExt, DoubleEndedIteratorExt};
 
     use super::*;
     use std::slice::{AsSlice, SlicePrelude};
@@ -2143,12 +2143,15 @@ mod tests {
         let gr_inds = s.grapheme_indices(true).rev().collect::<Vec<(uint, &str)>>();
         let b: &[_] = &[(11, "\r\n"), (6, "ö̲"), (3, "é"), (0u, "a̐")];
         assert_eq!(gr_inds.as_slice(), b);
-        let mut gr_inds = s.grapheme_indices(true);
-        let e1 = gr_inds.size_hint();
-        assert_eq!(e1, (1, Some(13)));
-        let c = gr_inds.count();
-        assert_eq!(c, 4);
-        let e2 = gr_inds.size_hint();
+        let mut gr_inds_iter = s.grapheme_indices(true);
+        {
+            let gr_inds = gr_inds_iter.by_ref();
+            let e1 = gr_inds.size_hint();
+            assert_eq!(e1, (1, Some(13)));
+            let c = gr_inds.count();
+            assert_eq!(c, 4);
+        }
+        let e2 = gr_inds_iter.size_hint();
         assert_eq!(e2, (0, Some(0)));
 
         // make sure the reverse iterator does the right thing with "\n" at beginning of string
@@ -2285,7 +2288,7 @@ mod bench {
     use test::Bencher;
     use test::black_box;
     use super::*;
-    use std::iter::{Iterator, DoubleEndedIterator};
+    use std::iter::{IteratorExt, DoubleEndedIteratorExt};
     use std::str::StrPrelude;
     use std::slice::SlicePrelude;
 

src/libcollections/vec.rs

@@ -1319,7 +1319,7 @@ impl<T> DoubleEndedIterator<T> for MoveItems<T> {
     }
 }
 
-impl<T> ExactSize<T> for MoveItems<T> {}
+impl<T> ExactSizeIterator<T> for MoveItems<T> {}
 
 #[unsafe_destructor]
 impl<T> Drop for MoveItems<T> {

src/libcore/fmt/float.rs

@@ -17,7 +17,7 @@ pub use self::SignFormat::*;
 use char;
 use char::Char;
 use fmt;
-use iter::{range, DoubleEndedIterator};
+use iter::{range, DoubleEndedIteratorExt};
 use num::{Float, FPNaN, FPInfinite, ToPrimitive};
 use num::cast;
 use result::Ok;

src/libcore/fmt/mod.rs

@@ -14,7 +14,7 @@
 
 use any;
 use cell::{Cell, Ref, RefMut};
-use iter::{Iterator, range};
+use iter::{Iterator, IteratorExt, range};
 use kinds::{Copy, Sized};
 use mem;
 use option::{Option, Some, None};

src/libcore/fmt/num.rs

@@ -15,7 +15,7 @@
 #![allow(unsigned_negation)]
 
 use fmt;
-use iter::DoubleEndedIterator;
+use iter::DoubleEndedIteratorExt;
 use num::{Int, cast};
 use slice::SlicePrelude;