rust/src/test/run-pass/extern-pass-TwoU8s.rs

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// Copyright 2012-2014 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.
// Test a foreign function that accepts and returns a struct
// by value.
#[deriving(PartialEq, Show)]
struct TwoU8s {
one: u8, two: u8
}
#[link(name = "rustrt")]
extern {
pub fn rust_dbg_extern_identity_TwoU8s(v: TwoU8s) -> TwoU8s;
}
pub fn main() {
unsafe {
let x = TwoU8s {one: 22, two: 23};
let y = rust_dbg_extern_identity_TwoU8s(x);
assert_eq!(x, y);
}
}