rust/src/test/compile-fail/transmute-fat-pointers.rs

42 lines
1.2 KiB
Rust
Raw Normal View History

// Copyright 2012 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution and at
// http://rust-lang.org/COPYRIGHT.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.
// Tests that are conservative around thin/fat pointer mismatches.
#![allow(dead_code)]
use std::mem::transmute;
fn a<T, Sized? U>(x: &[T]) -> &U {
unsafe { transmute(x) } //~ ERROR transmute called on types with potentially different sizes
}
fn b<Sized? T, Sized? U>(x: &T) -> &U {
unsafe { transmute(x) } //~ ERROR transmute called on types with potentially different sizes
}
fn c<T, U>(x: &T) -> &U {
unsafe { transmute(x) }
}
fn d<T, U>(x: &[T]) -> &[U] {
unsafe { transmute(x) }
}
fn e<Sized? T, U>(x: &T) -> &U {
unsafe { transmute(x) } //~ ERROR transmute called on types with potentially different sizes
}
fn f<T, Sized? U>(x: &T) -> &U {
unsafe { transmute(x) } //~ ERROR transmute called on types with potentially different sizes
}
fn main() { }