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| author | bors <bors@rust-lang.org> | 2018-01-01 07:21:23 +0000 |
|---|---|---|
| committer | bors <bors@rust-lang.org> | 2018-01-01 07:21:23 +0000 |
| commit | 1bcc6dc7ea430b7d403a57f60e48b3c3cdfcf562 (patch) | |
| tree | 2073115c9aa906116a5698340385e1aacfca21b4 /src/doc | |
| parent | f3ca88cff7dc397f409f561321ee3c4021c05436 (diff) | |
| parent | 8b4bdc2f3f753e0d0b00ecc892a813e9786621e9 (diff) | |
| download | rust-1bcc6dc7ea430b7d403a57f60e48b3c3cdfcf562.tar.gz rust-1bcc6dc7ea430b7d403a57f60e48b3c3cdfcf562.zip | |
Auto merge of #46895 - ricochet1k:macro-lifetimes, r=jseyfried
Allow lifetimes in macros This is a resurrection of PR #41927 which was a resurrection of #33135, which is intended to fix #34303. In short, this allows macros_rules! to use :lifetime as a matcher to match 'lifetimes. Still to do: - [x] Feature gate
Diffstat (limited to 'src/doc')
| -rw-r--r-- | src/doc/unstable-book/src/language-features/macro-lifetime-matcher.md | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/src/doc/unstable-book/src/language-features/macro-lifetime-matcher.md b/src/doc/unstable-book/src/language-features/macro-lifetime-matcher.md new file mode 100644 index 00000000000..5b585d7f041 --- /dev/null +++ b/src/doc/unstable-book/src/language-features/macro-lifetime-matcher.md @@ -0,0 +1,14 @@ +# `macro_lifetime_matcher` + +The tracking issue for this feature is: [#46895] + +With this feature gate enabled, the [list of fragment specifiers][frags] gains one more entry: + +* `lifetime`: a lifetime. Examples: 'static, 'a. + +A `lifetime` variable may be followed by anything. + +[#46895]: https://github.com/rust-lang/rust/issues/46895 +[frags]: ../book/first-edition/macros.html#syntactic-requirements + +------------------------ |