New upstream version 1.25.0+dfsg1

[rustc.git] / src / test / run-make / extern-fn-generic / test.rs

// Copyright 2014 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.

extern crate testcrate;

extern "C" fn bar<T>(ts: testcrate::TestStruct<T>) -> T { ts.y }

#[link(name = "test", kind = "static")]
extern {
    fn call(c: extern "C" fn(testcrate::TestStruct<i32>) -> i32) -> i32;
}

fn main() {
    // Let's test calling it cross crate
    let back = unsafe {
        testcrate::call(testcrate::foo::<i32>)
    };
    assert_eq!(3, back);

    // And just within this crate
    let back = unsafe {
        call(bar::<i32>)
    };
    assert_eq!(3, back);
}