rust/tests/ui/coherence/coherence_copy_like_err_tuple.rs

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// Test that we are able to introduce a negative constraint that
// `MyType: !MyTrait` along with other "fundamental" wrappers.
// aux-build:coherence_copy_like_lib.rs
extern crate coherence_copy_like_lib as lib;
struct MyType { x: i32 }
trait MyTrait { fn foo() {} }
impl<T: lib::MyCopy> MyTrait for T { }
// Tuples are not fundamental, therefore this would require that
//
// (MyType,): !MyTrait
//
// which we cannot approve.
impl MyTrait for (MyType,) { }
//~^ ERROR E0119
fn main() { }