mirror of
https://github.com/rust-lang/rust.git
synced 2024-11-27 17:24:06 +00:00
13 lines
268 B
Rust
13 lines
268 B
Rust
#![feature(macro_metavar_expr)]
|
|
|
|
macro_rules! metavar {
|
|
( $i:expr ) => {
|
|
${length(0)}
|
|
//~^ ERROR meta-variable expression `length` with depth parameter must be called inside of a macro repetition
|
|
};
|
|
}
|
|
|
|
const _: i32 = metavar!(0);
|
|
|
|
fn main() {}
|