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core: Stabilize FusedIterator

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FusedIterator is a marker trait that promises that the implementing
iterator continues to return `None` from `.next()` once it has returned
`None` once (and/or `.next_back()`, if implemented).

The effects of FusedIterator are already widely available through
`.fuse()`, but with stable `FusedIterator`, stable Rust users can
implement this trait for their iterators when appropriate.
This commit is contained in:
Ulrik Sverdrup 2018-01-15 19:59:10 +01:00
parent c9b86a9178
commit bc651cac8d
28 changed files with 110 additions and 114 deletions
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3
src/liballoc/lib.rs
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@ -96,7 +96,6 @@
#![feature(fmt_internals)]
#![feature(from_ref)]
#![feature(fundamental)]
#![feature(fused)]
#![feature(generic_param_attrs)]
#![feature(i128_type)]
#![feature(inclusive_range)]
@ -125,7 +124,7 @@
#![feature(on_unimplemented)]
#![feature(exact_chunks)]
#![cfg_attr(not(test), feature(fused, fn_traits, placement_new_protocol, swap_with_slice, i128))]
#![cfg_attr(not(test), feature(fn_traits, placement_new_protocol, swap_with_slice, i128))]
#![cfg_attr(test, feature(test, box_heap))]
// Allow testing this library