rust/library/core
bors d95d304861 Auto merge of #78429 - casey:doctest-attribute-splitting, r=jyn514
[librustdoc] Only split lang string on `,`, ` `, and `\t`

Split markdown lang strings into tokens on `,`.

The previous behavior was to split lang strings into tokens on any
character that wasn't a `_`, `_`, or alphanumeric.

This is a potentially breaking change, so please scrutinize! See discussion in #78344.

I noticed some test cases that made me wonder if there might have been some reason for the original behavior:

```
t("{.no_run .example}", false, true, Ignore::None, true, false, false, false, v(), None);
t("{.sh .should_panic}", true, false, Ignore::None, false, false, false, false, v(), None);
t("{.example .rust}", false, false, Ignore::None, true, false, false, false, v(), None);
t("{.test_harness .rust}", false, false, Ignore::None, true, true, false, false, v(), None);
```

It seemed pretty peculiar to specifically test lang strings in braces, with all the tokens prefixed by `.`.

I did some digging, and it looks like the test cases were added way back in [this commit from 2014](https://github.com/rust-lang/rust/commit/3fef7a74ca9a) by `@skade.`

It looks like they were added just to make sure that the splitting was permissive, and aren't testing that those strings in particular are accepted.

Closes https://github.com/rust-lang/rust/issues/78344.
2021-02-26 00:17:22 +00:00
..
benches Unify way to flip 6th bit. (Same assembly generated) 2021-02-08 12:21:36 +00:00
src Auto merge of #78429 - casey:doctest-attribute-splitting, r=jyn514 2021-02-26 00:17:22 +00:00
tests Rollup merge of #81167 - usbalbin:const_write, r=oli-obk 2021-02-25 14:33:51 +01:00
Cargo.toml