mirror of https://github.com/rust-lang/rust
35 lines
724 B
Rust
35 lines
724 B
Rust
//@ check-pass
|
|
//! This UI test was introduced as check-fail by a buggy bug-fix for an ICE. In
|
|
//! fact, this transmutation should be valid.
|
|
|
|
#![crate_type = "lib"]
|
|
#![feature(transmutability)]
|
|
#![allow(dead_code)]
|
|
|
|
use std::mem::size_of;
|
|
|
|
mod assert {
|
|
use std::mem::{Assume, BikeshedIntrinsicFrom};
|
|
|
|
pub fn is_maybe_transmutable<Src, Dst>()
|
|
where
|
|
Dst: BikeshedIntrinsicFrom<
|
|
Src,
|
|
{ Assume { alignment: true, lifetimes: true, safety: true, validity: true } },
|
|
>,
|
|
{
|
|
}
|
|
}
|
|
|
|
fn test() {
|
|
#[repr(C, align(2))]
|
|
struct A(u8, u8);
|
|
|
|
#[repr(C)]
|
|
struct B(u8, u8);
|
|
|
|
assert_eq!(size_of::<A>(), size_of::<B>());
|
|
|
|
assert::is_maybe_transmutable::<B, A>();
|
|
}
|