rust/tests/ui/transmute/transmute-impl.rs
2024-02-16 20:02:50 +00:00

26 lines
568 B
Rust

//@ normalize-stderr-test "\d+ bits" -> "N bits"
// Tests that are conservative around thin/fat pointer mismatches.
#![allow(dead_code)]
use std::mem::transmute;
struct Foo<T: ?Sized> {
t: Box<T>
}
impl<T: ?Sized> Foo<T> {
fn m(x: &T) -> &isize where T : Sized {
// OK here, because T : Sized is in scope.
unsafe { transmute(x) }
}
fn n(x: &T) -> &isize {
// Not OK here, because T : Sized is not in scope.
unsafe { transmute(x) } //~ ERROR cannot transmute between types of different sizes
}
}
fn main() { }