/// A simple `assert` macro that works in `const fn`, for use until the | |
/// standard `assert` macro works in `const fn`. | |
/// | |
/// TODO: Replace this with just `assert!`, once that's stable for use in | |
/// a `const fn` context. | |
#[allow(unused_macros)] | |
macro_rules! const_assert { | |
($x:expr) => { | |
let b: bool = $x; | |
let _ = [()][!b as usize]; | |
}; | |
} | |
#[test] | |
#[allow(clippy::missing_const_for_fn)] | |
fn test_const_assert() { | |
const_assert!(true); | |
} | |
#[test] | |
const fn test_const_assert_in_const_fn() { | |
const_assert!(true); | |
} |