diff options
Diffstat (limited to 'tests/ui/traits/negative-impls/negative-specializes-positive.rs')
-rw-r--r-- | tests/ui/traits/negative-impls/negative-specializes-positive.rs | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/tests/ui/traits/negative-impls/negative-specializes-positive.rs b/tests/ui/traits/negative-impls/negative-specializes-positive.rs new file mode 100644 index 000000000..0e227691e --- /dev/null +++ b/tests/ui/traits/negative-impls/negative-specializes-positive.rs @@ -0,0 +1,14 @@ +#![feature(specialization)] //~ WARN the feature `specialization` is incomplete +#![feature(negative_impls)] + +// Negative impl for u32 cannot "specialize" the base impl. +trait MyTrait {} +impl<T> MyTrait for T {} +impl !MyTrait for u32 {} //~ ERROR E0751 + +// The second impl specializes the first, no error. +trait MyTrait2 {} +impl<T> MyTrait2 for T {} +impl MyTrait2 for u32 {} + +fn main() {} |