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[rustc.git] / src / test / compile-fail / fat-ptr-cast.rs
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1a4d82fc 1// Copyright 2015 The Rust Project Developers. See the COPYRIGHT
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2// file at the top-level directory of this distribution and at
3// http://rust-lang.org/COPYRIGHT.
4//
5// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
6// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
7// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
8// option. This file may not be copied, modified, or distributed
9// except according to those terms.
10
62682a34 11trait Trait {}
d9579d0f 12
62682a34 13// Make sure casts between thin-pointer <-> fat pointer obey RFC401
c34b1796 14fn main() {
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15 let a: &[i32] = &[1, 2, 3];
16 let b: Box<[i32]> = Box::new([1, 2, 3]);
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17 let p = a as *const [i32];
18 let q = a.as_ptr();
9346a6ac 19
c1a9b12d 20 a as usize; //~ ERROR casting
54a0048b 21 //~^ HELP cast through a raw pointer first
d9579d0f 22 b as usize; //~ ERROR non-scalar cast
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23 p as usize;
24 //~^ ERROR casting
e9174d1e 25 //~^^ HELP cast through a thin pointer
d9579d0f 26
62682a34 27 // #22955
54a0048b 28 q as *const [i32]; //~ ERROR cannot cast
d9579d0f 29
62682a34 30 // #21397
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31 let t: *mut (Trait + 'static) = 0 as *mut _; //~ ERROR casting
32 let mut fail: *const str = 0 as *const str; //~ ERROR casting
223e47cc 33}