diff options
Diffstat (limited to 'src/test/ui/const-generics/generic_const_exprs/issue-85848.rs')
-rw-r--r-- | src/test/ui/const-generics/generic_const_exprs/issue-85848.rs | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/src/test/ui/const-generics/generic_const_exprs/issue-85848.rs b/src/test/ui/const-generics/generic_const_exprs/issue-85848.rs new file mode 100644 index 000000000..3a7f4c618 --- /dev/null +++ b/src/test/ui/const-generics/generic_const_exprs/issue-85848.rs @@ -0,0 +1,32 @@ +#![feature(generic_const_exprs)] +#![allow(incomplete_features)] + +trait _Contains<T> { + const does_contain: bool; +} + +trait Contains<T, const Satisfied: bool> {} + +trait Delegates<T> {} + +impl<T, U> Delegates<U> for T where T: Contains<U, true> {} + +const fn contains<A, B>() -> bool +where + A: _Contains<B>, +{ + A::does_contain +} + +impl<T, U> Contains<T, { contains::<T, U>() }> for U where T: _Contains<U> {} + +fn writes_to_path<C>(cap: &C) { + writes_to_specific_path(&cap); + //~^ ERROR: the trait bound `(): _Contains<&C>` is not satisfied [E0277] + //~| ERROR: unconstrained generic constant + //~| ERROR: mismatched types [E0308] +} + +fn writes_to_specific_path<C: Delegates<()>>(cap: &C) {} + +fn main() {} |