src/test/run-pass/deriving-meta.rs

   1
   2 // Copyright 2013-2014 The Rust Project Developers. See the COPYRIGHT
   3 // file at the top-level directory of this distribution and at
   4 // http://rust-lang.org/COPYRIGHT.
   5 //
   6 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
   7 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
   8 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
   9 // option. This file may not be copied, modified, or distributed
  10 // except according to those terms.
  11
  12 use std::hash::{Hash, SipHasher};
  13
  14 #[derive(PartialEq, Clone, Hash)]
  15 struct Foo {
  16     bar: uint,
  17     baz: int
  18 }
  19
  20 fn hash<T: Hash>(_t: &T) {}
  21
  22 pub fn main() {
  23     let a = Foo {bar: 4, baz: -3};
  24
  25     a == a;    // check for PartialEq impl w/o testing its correctness
  26     a.clone(); // check for Clone impl w/o testing its correctness
  27     hash(&a);  // check for Hash impl w/o testing its correctness
  28 }