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Diffstat (limited to '')
-rw-r--r-- | src/test/ui/type-alias-impl-trait/generic_duplicate_param_use.rs | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/src/test/ui/type-alias-impl-trait/generic_duplicate_param_use.rs b/src/test/ui/type-alias-impl-trait/generic_duplicate_param_use.rs new file mode 100644 index 000000000..093c1c231 --- /dev/null +++ b/src/test/ui/type-alias-impl-trait/generic_duplicate_param_use.rs @@ -0,0 +1,28 @@ +#![feature(type_alias_impl_trait)] + +use std::fmt::Debug; + +fn main() {} + +// test that unused generic parameters are ok +type TwoTys<T, U> = impl Debug; + +type TwoLifetimes<'a, 'b> = impl Debug; + +type TwoConsts<const X: usize, const Y: usize> = impl Debug; + + +fn one_ty<T: Debug>(t: T) -> TwoTys<T, T> { + t + //~^ ERROR non-defining opaque type use in defining scope +} + +fn one_lifetime<'a>(t: &'a u32) -> TwoLifetimes<'a, 'a> { + t + //~^ ERROR non-defining opaque type use in defining scope +} + +fn one_const<const N: usize>(t: *mut [u8; N]) -> TwoConsts<N, N> { + t + //~^ ERROR non-defining opaque type use in defining scope +} |