src/test/compile-fail/rfc1445/match-requires-both-partialeq-and-eq.rs

   1 // Copyright 2012 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 #![allow(dead_code)]
  12 #![deny(future_incompatible)]
  13
  14 #[derive(Eq)]
  15 struct Foo {
  16     x: u32
  17 }
  18
  19 impl PartialEq for Foo {
  20     fn eq(&self, _: &Foo) -> bool {
  21         false // ha ha sucker!
  22     }
  23 }
  24
  25 const FOO: Foo = Foo { x: 0 };
  26
  27 fn main() {
  28     let y = Foo { x: 1 };
  29     match y {
  30         FOO => { }
  31         //~^ ERROR must be annotated with `#[derive(PartialEq, Eq)]`
  32         //~| WARNING will become a hard error
  33         _ => { }
  34     }
  35 }