mirror of https://github.com/rust-lang/rust
17 lines
370 B
Rust
17 lines
370 B
Rust
#![feature(rustc_attrs)]
|
|
|
|
macro_rules! check {
|
|
($expr: expr) => (
|
|
#[rustc_dummy = $expr]
|
|
use main as _;
|
|
);
|
|
}
|
|
|
|
check!("0"); // OK
|
|
check!(0); // OK
|
|
check!(0u8); //~ ERROR suffixed literals are not allowed in attributes
|
|
check!(-0); //~ ERROR attribute value must be a literal
|
|
check!(0 + 0); //~ ERROR attribute value must be a literal
|
|
|
|
fn main() {}
|