1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
|
//@ revisions: current next
//@ ignore-compare-mode-next-solver (explicit revisions)
//@[next] compile-flags: -Znext-solver
#![feature(transmutability)]
mod assert {
use std::mem::{Assume, TransmuteFrom};
pub fn is_transmutable<Src, Dst>()
where
Dst: TransmuteFrom<Src, { Assume::SAFETY }>
{}
pub fn is_maybe_transmutable<Src, Dst>()
where
Dst: TransmuteFrom<Src, { Assume::SAFETY.and(Assume::VALIDITY) }>
{}
}
fn main() {
assert::is_transmutable::<u8, bool>(); //~ ERROR cannot be safely transmuted
assert::is_maybe_transmutable::<u8, bool>();
assert::is_transmutable::<bool, u8>();
}
|