rust/tests/ui/intrinsics/const-eval-select.rs
2023-01-11 09:32:08 +00:00

28 lines
443 B
Rust

// run-pass
#![feature(const_eval_select)]
#![feature(core_intrinsics)]
use std::intrinsics::const_eval_select;
const fn yes() -> bool {
true
}
fn no() -> bool {
false
}
// not a sound use case; testing only
const fn is_const_eval() -> bool {
unsafe { const_eval_select((), yes, no) }
}
fn main() {
const YES: bool = is_const_eval();
let no = is_const_eval();
assert_eq!(true, YES);
assert_eq!(false, no);
}