associated-const-cross-crate-const-eval.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.

// aux-build:associated-const-cc-lib.rs


extern crate associated_const_cc_lib as foolib;

pub struct LocalFoo;

impl foolib::Foo for LocalFoo {
    const BAR: usize = 1;
}

const FOO_1: usize = <foolib::FooNoDefault as foolib::Foo>::BAR;
const FOO_2: usize = <LocalFoo as foolib::Foo>::BAR;
const FOO_3: usize = foolib::InherentBar::BAR;

fn main() {
    assert_eq!(0, FOO_1);
    assert_eq!(1, FOO_2);
    assert_eq!(3, FOO_3);

    match 0 {
        <foolib::FooNoDefault as foolib::Foo>::BAR => {},
        <LocalFoo as foolib::Foo>::BAR => assert!(false),
        foolib::InherentBar::BAR => assert!(false),
        _ => assert!(false)
    }
}