mirror of https://github.com/rust-lang/rust
25 lines
592 B
Rust
25 lines
592 B
Rust
//@ check-fail
|
|
#![feature(transmutability)]
|
|
|
|
mod assert {
|
|
use std::mem::{Assume, BikeshedIntrinsicFrom};
|
|
|
|
pub fn is_maybe_transmutable<Src, Dst>()
|
|
where
|
|
Dst: BikeshedIntrinsicFrom<Src, {
|
|
Assume {
|
|
alignment: true,
|
|
lifetimes: false,
|
|
safety: true,
|
|
validity: false,
|
|
}
|
|
}>
|
|
{}
|
|
}
|
|
|
|
fn main() {
|
|
#[repr(C)] struct A(bool, &'static A);
|
|
#[repr(C)] struct B(u8, &'static B);
|
|
assert::is_maybe_transmutable::<&'static B, &'static A>(); //~ ERROR cannot be safely transmuted
|
|
}
|