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| author | Ulrik Sverdrup <bluss@users.noreply.github.com> | 2016-04-21 21:35:39 +0200 |
|---|---|---|
| committer | Ulrik Sverdrup <bluss@users.noreply.github.com> | 2016-06-14 15:51:49 +0200 |
| commit | 13f8f40961d4e2166a80699a2e21a5dbf2211ecb (patch) | |
| tree | 79923c08a4f66c0c8ec27737faa25ff42f16962b | |
| parent | 515c4d3c1e6c38ff2d8bd3b3b3e5bd8b6b4c2322 (diff) | |
| download | rust-13f8f40961d4e2166a80699a2e21a5dbf2211ecb.tar.gz rust-13f8f40961d4e2166a80699a2e21a5dbf2211ecb.zip | |
specialize zip: TrustedRandomAccess for Enumerate
| -rw-r--r-- | src/libcore/iter/mod.rs | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/src/libcore/iter/mod.rs b/src/libcore/iter/mod.rs index 3ca37c40903..1a2d8e57e86 100644 --- a/src/libcore/iter/mod.rs +++ b/src/libcore/iter/mod.rs @@ -1092,6 +1092,15 @@ impl<I> DoubleEndedIterator for Enumerate<I> where #[stable(feature = "rust1", since = "1.0.0")] impl<I> ExactSizeIterator for Enumerate<I> where I: ExactSizeIterator {} +#[doc(hidden)] +unsafe impl<I> TrustedRandomAccess for Enumerate<I> + where I: TrustedRandomAccess +{ + unsafe fn get_unchecked(&mut self, i: usize) -> (usize, I::Item) { + (self.count + i, self.iter.get_unchecked(i)) + } +} + /// An iterator with a `peek()` that returns an optional reference to the next /// element. /// |