diff options
Diffstat (limited to 'src/test/ui/coherence/coherence_copy_like_err_tuple.rs')
-rw-r--r-- | src/test/ui/coherence/coherence_copy_like_err_tuple.rs | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/src/test/ui/coherence/coherence_copy_like_err_tuple.rs b/src/test/ui/coherence/coherence_copy_like_err_tuple.rs new file mode 100644 index 000000000..f63e205c9 --- /dev/null +++ b/src/test/ui/coherence/coherence_copy_like_err_tuple.rs @@ -0,0 +1,21 @@ +// 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() { } |