diff options
Diffstat (limited to 'src/test/ui/const-generics/generic_const_exprs/nested_uneval_unification-1.rs')
-rw-r--r-- | src/test/ui/const-generics/generic_const_exprs/nested_uneval_unification-1.rs | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/src/test/ui/const-generics/generic_const_exprs/nested_uneval_unification-1.rs b/src/test/ui/const-generics/generic_const_exprs/nested_uneval_unification-1.rs new file mode 100644 index 000000000..316887e5e --- /dev/null +++ b/src/test/ui/const-generics/generic_const_exprs/nested_uneval_unification-1.rs @@ -0,0 +1,34 @@ +// run-pass +#![feature(generic_const_exprs)] +#![allow(incomplete_features)] + +fn zero_init<const N: usize>() -> Substs1<N> +where + [u8; N + 1]: , +{ + Substs1([0; N + 1]) +} +struct Substs1<const N: usize>([u8; N + 1]) +where + [(); N + 1]: ; + +fn substs2<const M: usize>() -> Substs1<{ M * 2 }> +where + [(); { M * 2 } + 1]: , +{ + zero_init::<{ M * 2 }>() +} + +fn substs3<const L: usize>() -> Substs1<{ (L - 1) * 2 }> +where + [(); (L - 1) * 2 + 1]: , +{ + substs2::<{ L - 1 }>() +} + +fn main() { + assert_eq!(substs3::<2>().0, [0; 3]); +} + +// Test that the ``{ (L - 1) * 2 + 1 }`` bound on ``substs3`` satisfies the +// ``{ N + 1 }`` bound on ``Substs1`` |