diff options
Diffstat (limited to 'src/test/ui/specialization/min_specialization/specialization_super_trait.rs')
-rw-r--r-- | src/test/ui/specialization/min_specialization/specialization_super_trait.rs | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/src/test/ui/specialization/min_specialization/specialization_super_trait.rs b/src/test/ui/specialization/min_specialization/specialization_super_trait.rs new file mode 100644 index 000000000..145f376ed --- /dev/null +++ b/src/test/ui/specialization/min_specialization/specialization_super_trait.rs @@ -0,0 +1,18 @@ +// Test that supertraits can't be assumed in impls of +// `rustc_specialization_trait`, as such impls would +// allow specializing on the supertrait. + +#![feature(min_specialization)] +#![feature(rustc_attrs)] + +#[rustc_specialization_trait] +trait SpecMarker: Default { + fn f(); +} + +impl<T: Default> SpecMarker for T { + //~^ ERROR cannot specialize + fn f() {} +} + +fn main() {} |