src/test/run-pass/const-unsafe-fn.rs

// Copyright 2015 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.

// A quick test of 'unsafe const fn' functionality

#![feature(const_fn)]

const unsafe fn dummy(v: u32) -> u32 {
    !v
}

struct Type;
impl Type {
    const unsafe fn new() -> Type {
        Type
    }
}

const VAL: u32 = unsafe { dummy(0xFFFF) };
const TYPE_INST: Type = unsafe { Type::new() };

fn main() {
    assert_eq!(VAL, 0xFFFF0000);
}