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| author | Steven Allen <steven@stebalien.com> | 2016-08-13 14:42:36 -0400 |
|---|---|---|
| committer | Steven Allen <steven@stebalien.com> | 2016-08-18 12:16:29 -0400 |
| commit | de91872a3337dddf9a0d27df7bfb64f3965c81b0 (patch) | |
| tree | 5204b54ce4d67aa5eb959f741167db6cba2f2454 /src/liballoc | |
| parent | 43c090ed69a624928c03ad61a29a59badf80ff7b (diff) | |
| download | rust-de91872a3337dddf9a0d27df7bfb64f3965c81b0.tar.gz rust-de91872a3337dddf9a0d27df7bfb64f3965c81b0.zip | |
Add a FusedIterator trait.
This trait can be used to avoid the overhead of a fuse wrapper when an iterator is already well-behaved. Conforming to: RFC 1581 Closes: #35602
Diffstat (limited to 'src/liballoc')
| -rw-r--r-- | src/liballoc/boxed.rs | 4 | ||||
| -rw-r--r-- | src/liballoc/lib.rs | 2 |
2 files changed, 5 insertions, 1 deletions
diff --git a/src/liballoc/boxed.rs b/src/liballoc/boxed.rs index 7ba5ca30941..dae12f6e8bd 100644 --- a/src/liballoc/boxed.rs +++ b/src/liballoc/boxed.rs @@ -61,6 +61,7 @@ use core::borrow; use core::cmp::Ordering; use core::fmt; use core::hash::{self, Hash}; +use core::iter::FusedIterator; use core::marker::{self, Unsize}; use core::mem; use core::ops::{CoerceUnsized, Deref, DerefMut}; @@ -529,6 +530,9 @@ impl<I: DoubleEndedIterator + ?Sized> DoubleEndedIterator for Box<I> { #[stable(feature = "rust1", since = "1.0.0")] impl<I: ExactSizeIterator + ?Sized> ExactSizeIterator for Box<I> {} +#[unstable(feature = "fused", issue = "35602")] +impl<I: FusedIterator + ?Sized> FusedIterator for Box<I> {} + /// `FnBox` is a version of the `FnOnce` intended for use with boxed /// closure objects. The idea is that where one would normally store a diff --git a/src/liballoc/lib.rs b/src/liballoc/lib.rs index 0293d5402c4..90037f813cd 100644 --- a/src/liballoc/lib.rs +++ b/src/liballoc/lib.rs @@ -91,7 +91,7 @@ #![feature(unsafe_no_drop_flag, filling_drop)] #![feature(unsize)] -#![cfg_attr(not(test), feature(raw, fn_traits, placement_new_protocol))] +#![cfg_attr(not(test), feature(fused, raw, fn_traits, placement_new_protocol))] #![cfg_attr(test, feature(test, box_heap))] // Allow testing this library |