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

   1 // Copyright 2012-2014 The Rust Project Developers. See the COPYRIGHT
   2 // file at the top-level directory of this distribution and at
   3 // http://rust-lang.org/COPYRIGHT.
   4 //
   5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
   6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
   7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
   8 // option. This file may not be copied, modified, or distributed
   9 // except according to those terms.
  10
  11 // ignore-wasm32-bare no libc for ffi testing
  12
  13 // Test a foreign function that accepts and returns a struct
  14 // by value.
  15
  16 #[derive(Copy, Clone, PartialEq, Debug)]
  17 pub struct TwoU8s {
  18     one: u8, two: u8
  19 }
  20
  21 #[link(name = "rust_test_helpers", kind = "static")]
  22 extern {
  23     pub fn rust_dbg_extern_identity_TwoU8s(v: TwoU8s) -> TwoU8s;
  24 }
  25
  26 pub fn main() {
  27     unsafe {
  28         let x = TwoU8s {one: 22, two: 23};
  29         let y = rust_dbg_extern_identity_TwoU8s(x);
  30         assert_eq!(x, y);
  31     }
  32 }