src/test/compile-fail/coherence-default-trait-impl.rs

   1 // Copyright 2015 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 #![feature(optin_builtin_traits)]
  12
  13 trait MyTrait {}
  14
  15 impl MyTrait for .. {}
  16 //~^ ERROR redundant default implementations of trait `MyTrait`
  17
  18 impl MyTrait for .. {}
  19
  20 trait MySafeTrait {}
  21
  22 unsafe impl MySafeTrait for .. {}
  23 //~^ ERROR implementing the trait `MySafeTrait` is not unsafe
  24
  25 unsafe trait MyUnsafeTrait {}
  26
  27 impl MyUnsafeTrait for .. {}
  28 //~^ ERROR the trait `MyUnsafeTrait` requires an `unsafe impl` declaration
  29
  30 fn main() {}