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Add a FusedIterator trait.

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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
This commit is contained in:
Steven Allen 2016-08-13 14:42:36 -04:00
parent 43c090ed69
commit de91872a33
29 changed files with 437 additions and 24 deletions
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4
src/libstd/ascii.rs
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@ -16,6 +16,7 @@ use prelude::v1::*;
use mem;
use ops::Range;
use iter::FusedIterator;
/// Extension methods for ASCII-subset only operations on string slices.
///
@ -368,6 +369,9 @@ impl DoubleEndedIterator for EscapeDefault {
}
#[stable(feature = "rust1", since = "1.0.0")]
impl ExactSizeIterator for EscapeDefault {}
#[unstable(feature = "fused", issue = "35602")]
impl FusedIterator for EscapeDefault {}
static ASCII_LOWERCASE_MAP: [u8; 256] = [
0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,