diff options
Diffstat (limited to 'tests/ui/rfc-2632-const-trait-impl/specializing-constness.rs')
-rw-r--r-- | tests/ui/rfc-2632-const-trait-impl/specializing-constness.rs | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/tests/ui/rfc-2632-const-trait-impl/specializing-constness.rs b/tests/ui/rfc-2632-const-trait-impl/specializing-constness.rs new file mode 100644 index 000000000..9ab170f09 --- /dev/null +++ b/tests/ui/rfc-2632-const-trait-impl/specializing-constness.rs @@ -0,0 +1,28 @@ +#![feature(const_trait_impl, min_specialization, rustc_attrs)] + +#[rustc_specialization_trait] +#[const_trait] +pub trait Sup {} + +impl const Sup for () {} + +#[const_trait] +pub trait A { + fn a() -> u32; +} + +impl<T: ~const Default> const A for T { + default fn a() -> u32 { + 2 + } +} + +impl<T: Default + Sup> A for T { +//~^ ERROR: cannot specialize +//~| ERROR: missing `~const` qualifier + fn a() -> u32 { + 3 + } +} + +fn main() {} |