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

34 lines
808 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;
fn a<T, U: ?Sized>(x: &[T]) -> &U {
unsafe { transmute(x) } //~ ERROR cannot transmute between types of different sizes
}
fn b<T: ?Sized, U: ?Sized>(x: &T) -> &U {
unsafe { transmute(x) } //~ ERROR cannot transmute between types of different sizes
}
fn c<T, U>(x: &T) -> &U {
unsafe { transmute(x) }
}
fn d<T, U>(x: &[T]) -> &[U] {
unsafe { transmute(x) }
}
fn e<T: ?Sized, U>(x: &T) -> &U {
unsafe { transmute(x) } //~ ERROR cannot transmute between types of different sizes
}
fn f<T, U: ?Sized>(x: &T) -> &U {
unsafe { transmute(x) } //~ ERROR cannot transmute between types of different sizes
}
fn main() { }