rust/tests/ui/transmute/main.rs

30 lines
810 B
Rust

//@ normalize-stderr-32bit: "`&str` \(64 bits\)" -> "`&str` ($$STR bits)"
//@ normalize-stderr-64bit: "`&str` \(128 bits\)" -> "`&str` ($$STR bits)"
use std::mem::transmute;
pub trait TypeConstructor<'a> {
type T;
}
unsafe fn transmute_lifetime<'a, 'b, C>(x: <C as TypeConstructor<'a>>::T)
-> <C as TypeConstructor<'b>>::T
where for<'z> C: TypeConstructor<'z> {
transmute(x)
}
unsafe fn sizes() {
let x: u8 = transmute(10u16); //~ ERROR cannot transmute between types of different sizes
}
unsafe fn ptrs() {
let x: u8 = transmute("test"); //~ ERROR cannot transmute between types of different sizes
}
union Foo { x: () }
unsafe fn vary() {
let x: Foo = transmute(10); //~ ERROR cannot transmute between types of different sizes
}
fn main() {}