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Allow | after pat in macro_rules! #20824

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Closed

Allow | after pat in macro_rules! #20824

wants to merge 1 commit into from

Commits on Jan 9, 2015

  1. Allow | after pat in macro_rules! 

    Per rust-lang#20563 (comment)

This enables writing macros that accept `$($pattern:pat)|+` and expand to the same thing in a `match` statement. See for example [the `matches!` macro](https://github.com/SimonSapin/rust-std-candidates#the-matches-macro).
    @SimonSapin
    SimonSapin committed Jan 9, 2015
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