Add test for macro_rules! invoking a proc-macro with capture groups

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Aaron Hill 2020-05-20 13:16:29 -04:00
parent 2af0218bf1
commit 30c00fd26a
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2 changed files with 30 additions and 0 deletions

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// aux-build: test-macros.rs
extern crate test_macros;
use test_macros::recollect_attr;
macro_rules! reemit {
($name:ident => $($token:expr)*) => {
#[recollect_attr]
pub fn $name() {
$($token)*;
}
}
}
reemit! { foo => 45u32.into() } //~ ERROR type annotations
fn main() {}

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error[E0282]: type annotations needed
--> $DIR/macro-rules-capture.rs:16:24
|
LL | reemit! { foo => 45u32.into() }
| ------^^^^--
| | |
| | cannot infer type for type parameter `T` declared on the trait `Into`
| this method call resolves to `T`
error: aborting due to previous error
For more information about this error, try `rustc --explain E0282`.