macros: fix bug in stmt matchers
#34886
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@bors r+ |
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📌 Commit bd1ad76 has been approved by |
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Jul 18, 2016
macros: fix bug in `stmt` matchers
Today, `stmt` matchers stop too early when parsing expression statements that begin with non-braced macro invocations. For example,
```rust
fn main() {
macro_rules! m { ($s:stmt;) => { $s } }
id!(vec![].push(0););
//^ Before this PR, the `stmt` matcher only consumes "vec![]", so this is an error.
//| After this PR, the `stmt` matcher consumes "vec![].push(0)", so this compiles.
}
```
This change is backwards compatible due to the follow set for `stmt`.
r? @eddyb
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💔 Test failed - auto-win-msvc-64-opt-mir |
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@bors force retry |
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Today,
stmtmatchers stop too early when parsing expression statements that begin with non-braced macro invocations. For example,This change is backwards compatible due to the follow set for
stmt.r? @eddyb