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

// 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.

use std::{str, string};

const A: [u8, ..2] = ['h' as u8, 'i' as u8];
const B: &'static [u8, ..2] = &A;
const C: *const u8 = B as *const u8;

pub fn main() {
    unsafe {
        let foo = &A as *const u8;
        assert_eq!(str::raw::from_utf8(A), "hi");
        assert_eq!(string::raw::from_buf_len(foo, A.len()), "hi".to_string());
        assert_eq!(string::raw::from_buf_len(C, B.len()), "hi".to_string());
        assert!(*C == A[0]);
        assert!(*(&B[0] as *const u8) == A[0]);

        let bar = str::raw::from_utf8(A).to_c_str();
        assert_eq!(bar.as_str(), "hi".to_c_str().as_str());
    }
}