rust/src/libcore/str, branch 1.22.1

Auto merge of #44174 - jimmycuadra:try-from-infallible, r=sfackler

2017-09-29T22:35:23+00:00

Add blanket TryFrom impl when From is implemented. Adds `impl TryFrom for U where U: From`. Removes `impl<'a, T> TryFrom<&'a str> for T where T: FromStr` (originally added in #40281) due to overlapping impls caused by the new blanket impl. This removal is to be discussed further on the tracking issue for TryFrom. Refs #33417. /cc @sfackler, @scottmcm (thank you for the help!), and @aturon

TrustedRandomAccess specialisation for Cloned.

2017-09-23T19:30:53+00:00

This verifies that TrustedRandomAccess has no side effects when the iterator item implements Copy. This also implements TrustedLen and TrustedRandomAccess for str::Bytes.

Rollup merge of #44658 - leodasvacas:remove-str-eq-lang-item, r=arielb1

2017-09-23T04:29:11+00:00

Remove str_eq lang item It's not really a lang item. Also remove outdated note. The reference uses this as an example so it has to be updated.

Rollup merge of #44657 - Ixrec:patch-1, r=eddyb

2017-09-18T16:04:25+00:00

Replace str's transmute() calls with pointer casts After the following conversation in #rust-lang: ``` [14:43:50] TIL the implementation of from_utf_unchecked is literally just "mem::transmute(x)" [14:43:59] no wonder people keep saying transmute is overpowered [15:15:30] Ixrec: it should be a pointer cast lol [15:15:46] unless it doesn't let you [16:50:34] https://play.rust-lang.org/?gist=d1e6b629ad9ec1baf64ce261c63845e6&version=stable seems like it does let me [16:52:35] Ixrec: yeah that's the preferred impl [16:52:46] Ixrec: it just wasn't in 1.0 [16:52:50] IIRC [16:53:00] (something something fat pointers) ``` Since I already wrote half of the preferred impls in the playground, might as well make an actual PR.

Add `<*const T>::align_offset` and use it in `memchr`

2017-09-17T19:30:58+00:00

missed a 'mut'

2017-09-17T16:11:42+00:00

Remove unused str_eq lang item

2017-09-17T16:04:49+00:00

It's not a lang item anymore. Also remove outdated note.

Replace str's transmute() calls with pointer casts

2017-09-17T16:03:56+00:00

After the following conversation in #rust-lang: ``` [14:43:50] TIL the implementation of from_utf_unchecked is literally just "mem::transmute(x)" [14:43:59] no wonder people keep saying transmute is overpowered [15:15:30] Ixrec: it should be a pointer cast lol [15:15:46] unless it doesn't let you [16:50:34] https://play.rust-lang.org/?gist=d1e6b629ad9ec1baf64ce261c63845e6&version=stable seems like it does let me [16:52:35] Ixrec: yeah that's the preferred impl [16:52:46] Ixrec: it just wasn't in 1.0 [16:52:50] IIRC [16:53:00] (something something fat pointers) ``` Since I already wrote half of the preferred impls in the playground, might as well make an actual PR.

Rollup merge of #44477 - napen123:master, r=frewsxcv

2017-09-15T02:32:42+00:00

Add doc examples to str::from_utf8_unchecked_mut Fixes #44461

Remove Invalid UTF-8 from str::from_utf8_unchecked_mut

2017-09-12T23:30:44+00:00