Rust 1.27 #257
Rust 1.27 #257
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_posts/2018-06-21-Rust-1.27.md
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| This release has two big language features that people have been waiting for. | ||
| But first, a small comment on documentation: All books in [the Rust | ||
| Bookshelf] are [now searchable]! For example, here's [a search on TRPL for |
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hm, should we make this "The Rust Programming Language"? Not all readers will be familiar with TRPL.
_posts/2018-06-21-Rust-1.27.md
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| This release has two big language features that people have been waiting for. | ||
| But first, a small comment on documentation: All books in [the Rust | ||
| Bookshelf] are [now searchable]! For example, here's [a search on TRPL for | ||
| 'borrow'](https://doc.rust-lang.org/beta/book/second-edition/?search=borrow). |
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This URL points to beta but should probably point at stable.
_posts/2018-06-21-Rust-1.27.md
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| Here, we're taking two slices, and adding the numbers together, placing the | ||
| result in a third slice. The simplest possible way to do this would be to do | ||
| exactly what the code says, and loop through each set of elements, add them |
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s/what the code says/what the code does/ perhaps?
| Beyond *that*, you may never write any of this yourself, but as always, the | ||
| libraries you depend on may. For example, the [regex crate has already added | ||
| support](https://github.com/rust-lang/regex/pull/456), and a new release | ||
| will contain these SIMD speedups without you needing to do anything at all! |
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Ah thanks for the reminder on this! It is almost true. I just put up a PR to make this happen: rust-lang/regex#490 (Today, you still need to pass the unstable feature at compile time.)
Once that PR is green I'll merge it and get out a new release, so this should be good to go by Thursday.
Also, thanks for mentioning this. :-) <3
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OK, regex 1.0.1 is out and this text is now correct. :-)
_posts/2018-06-21-Rust-1.27.md
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| exactly what the code says, and loop through each set of elements, add them | ||
| together, and store it in the result. However, compilers can often do better. | ||
| LLVM will often "autovectorize" code like this, which is a fancy term for | ||
| "use SIMD." Imagine that `a` and `b` were both 16 elements long. Each elemnt |
_posts/2018-06-21-Rust-1.27.md
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| module] allows us to use these kinds of instructions *directly*, which | ||
| means we don't need to rely on a smart compiler. Additionally, it includes | ||
| some features that allow us to choose a particular implementation based | ||
| on various critera. For example: |
| Due to backwards compatibility, we cannot remove the old syntax, but we have | ||
| included a lint, which is set to allow by default, called [`bare-trait-object`]. | ||
| If you want to lint against the older syntax, you can turn it on. We thought that | ||
| it would throw far too many warnings to turn on by default at present. |
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Maybe worth mentioning that rustfix is in the works?
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Tossing in a little sidebar about this 👍
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| Additionally, a tweak to the way Cargo deals with targets has landed. Cargo | ||
| will attempt to automatically discover tests, examples, and binaries within | ||
| your project. However, sometimes explicit configuration is needed. But the |
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I found this sequence a bit confusing, and in particular think it should probably be "the initial implementation had a problem"
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I added a had. Not sure how to make it better than that. Anyone else?
| But first, a small comment on documentation: All books in [the Rust | ||
| Bookshelf] are [now searchable]! For example, here's [a search of "The Rust | ||
| Programming Language" for | ||
| 'borrow'](https://doc.rust-lang.org/book/second-edition/?search=borrow). |
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This link doesn't seem to work for me. It just takes me to the forward of the second-edition.
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Most of the new links won't work until 1.27 is released. You can see the working link in the beta docs though: https://doc.rust-lang.org/beta/book/second-edition/?search=borrow
_posts/2018-06-21-Rust-1.27.md
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| @@ -21,6 +21,16 @@ appropriate page on our website, and check out the [detailed release notes for | |||
| [install]: https://www.rust-lang.org/install.html | |||
| [notes]: https://github.com/rust-lang/rust/blob/master/RELEASES.md#version-1270-2018-06-21 | |||
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| Additionally, we would like to draw attention to something: just before the | |||
| release of 1.27.0, we found [a | |||
| bug](https://github.com/rust-lang/rust/pull/51686) in the 'deafault match | |||
_posts/2018-06-21-Rust-1.27.md
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| @@ -21,6 +21,16 @@ appropriate page on our website, and check out the [detailed release notes for | |||
| [install]: https://www.rust-lang.org/install.html | |||
| [notes]: https://github.com/rust-lang/rust/blob/master/RELEASES.md#version-1270-2018-06-21 | |||
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| Additionally, we would like to draw attention to something: just before the | |||
| release of 1.27.0, we found [a | |||
| bug](https://github.com/rust-lang/rust/pull/51686) in the 'deafault match | |||
_posts/2018-06-21-Rust-1.27.md
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| Additionally, we would like to draw attention to something: just before the | ||
| release of 1.27.0, we found [a | ||
| bug](https://github.com/rust-lang/rust/pull/51686) in the 'deafault match | ||
| bindings' feature introduced in 1.26.0 that can possibly introduce unsoundess. |
The first half of this is done, working on the second half. r? @rust-lang/core
additionally, cc @BurntSushi; I want to make sure that I'm right with regards to regex here, and if you'd like me to take it out, no hard feelings of course!