diff options
Diffstat (limited to 'src/test/ui/type-alias-impl-trait/assoc-type-lifetime-unconstrained.rs')
-rw-r--r-- | src/test/ui/type-alias-impl-trait/assoc-type-lifetime-unconstrained.rs | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/src/test/ui/type-alias-impl-trait/assoc-type-lifetime-unconstrained.rs b/src/test/ui/type-alias-impl-trait/assoc-type-lifetime-unconstrained.rs new file mode 100644 index 000000000..3f34b00ec --- /dev/null +++ b/src/test/ui/type-alias-impl-trait/assoc-type-lifetime-unconstrained.rs @@ -0,0 +1,26 @@ +// Tests that we don't allow unconstrained lifetime parameters in impls when +// the lifetime is used in an associated opaque type. + +#![feature(type_alias_impl_trait)] + +trait UnwrapItemsExt { + type Iter; + fn unwrap_items(self) -> Self::Iter; +} + +struct MyStruct {} + +trait MyTrait<'a> {} + +impl<'a> MyTrait<'a> for MyStruct {} + +impl<'a, I> UnwrapItemsExt for I { + //~^ ERROR the lifetime parameter `'a` is not constrained + type Iter = impl MyTrait<'a>; + + fn unwrap_items(self) -> Self::Iter { + MyStruct {} + } +} + +fn main() {} |