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Rollup merge of #34688 - GuillaumeGomez:double_ended_iterator, r=steveklabnik 

Improve DoubleEndedIterator examples

Fixes #34065.

r? @steveklabnik
This commit is contained in:
Manish Goregaokar 2016-07-08 13:14:20 +05:30
parent f4ae98ab8c 630e4eb4c5
commit 4ee6a666e4
1 changed files with 12 additions and 6 deletions
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18
src/libcore/iter/traits.rs
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@ -371,13 +371,16 @@ pub trait Extend<A> {
/// Basic usage:
///
/// ```
/// let numbers = vec![1, 2, 3];
/// let numbers = vec![1, 2, 3, 4, 5, 6];
///
/// let mut iter = numbers.iter();
///
/// assert_eq!(Some(&1), iter.next());
/// assert_eq!(Some(&3), iter.next_back());
/// assert_eq!(Some(&2), iter.next_back());
/// assert_eq!(Some(&6), iter.next_back());
/// assert_eq!(Some(&5), iter.next_back());
/// assert_eq!(Some(&2), iter.next());
/// assert_eq!(Some(&3), iter.next());
/// assert_eq!(Some(&4), iter.next());
/// assert_eq!(None, iter.next());
/// assert_eq!(None, iter.next_back());
/// ```
@ -395,13 +398,16 @@ pub trait DoubleEndedIterator: Iterator {
/// Basic usage:
///
/// ```
/// let numbers = vec![1, 2, 3];
/// let numbers = vec![1, 2, 3, 4, 5, 6];
///
/// let mut iter = numbers.iter();
///
/// assert_eq!(Some(&1), iter.next());
/// assert_eq!(Some(&3), iter.next_back());
/// assert_eq!(Some(&2), iter.next_back());
/// assert_eq!(Some(&6), iter.next_back());
/// assert_eq!(Some(&5), iter.next_back());
/// assert_eq!(Some(&2), iter.next());
/// assert_eq!(Some(&3), iter.next());
/// assert_eq!(Some(&4), iter.next());
/// assert_eq!(None, iter.next());
/// assert_eq!(None, iter.next_back());
/// ```