src/test/run-pass/const-str-ptr.rs

   1 // Copyright 2012 The Rust Project Developers. See the COPYRIGHT
   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
  11 #![feature(rustc_attrs)]
  12
  13 // ignore-pretty : (#23623) problems when  ending with // comments
  14
  15 use std::{str, string};
  16
  17 const A: [u8; 2] = ['h' as u8, 'i' as u8];
  18 const B: &'static [u8; 2] = &A;
  19 const C: *const u8 = B as *const u8;
  20
  21 #[rustc_no_mir] // FIXME #27840 MIR can't do rvalue promotion yet.
  22 pub fn main() {
  23     unsafe {
  24         let foo = &A as *const u8;
  25         assert_eq!(foo, C);
  26         assert_eq!(str::from_utf8_unchecked(&A), "hi");
  27         assert_eq!(*C, A[0]);
  28         assert_eq!(*(&B[0] as *const u8), A[0]);
  29     }
  30 }