tests/ui/coherence/coherence_copy_like_err_tuple.rs

   1 // Test that we are able to introduce a negative constraint that
   2 // `MyType: !MyTrait` along with other "fundamental" wrappers.
   3
   4 // aux-build:coherence_copy_like_lib.rs
   5
   6 extern crate coherence_copy_like_lib as lib;
   7
   8 struct MyType { x: i32 }
   9
  10 trait MyTrait { fn foo() {} }
  11 impl<T: lib::MyCopy> MyTrait for T { }
  12
  13 // Tuples are not fundamental, therefore this would require that
  14 //
  15 //     (MyType,): !MyTrait
  16 //
  17 // which we cannot approve.
  18 impl MyTrait for (MyType,) { }
  19 //~^ ERROR E0119
  20
  21 fn main() { }