mirror of
https://github.com/rust-lang/rust.git
synced 2024-10-31 22:41:50 +00:00
32 lines
656 B
Rust
32 lines
656 B
Rust
// check-pass
|
|
// compile-flags: -Z span-debug --error-format human
|
|
// aux-build:test-macros.rs
|
|
|
|
#![feature(rustc_attrs)]
|
|
#![feature(stmt_expr_attributes)]
|
|
|
|
#![no_std] // Don't load unnecessary hygiene information from std
|
|
extern crate std;
|
|
|
|
#[macro_use]
|
|
extern crate test_macros;
|
|
|
|
macro_rules! produce_it {
|
|
($expr:expr) => {
|
|
#[derive(Print)]
|
|
struct Foo {
|
|
val: [bool; {
|
|
let a = #[cfg_attr(not(FALSE), rustc_dummy(first))] $expr;
|
|
0
|
|
}]
|
|
}
|
|
}
|
|
}
|
|
|
|
produce_it!(#[cfg_attr(not(FALSE), rustc_dummy(second))] {
|
|
#![cfg_attr(not(FALSE), allow(unused))]
|
|
30
|
|
});
|
|
|
|
fn main() {}
|