32 lines
756 B
Rust
32 lines
756 B
Rust
//@ run-pass
|
|
#![feature(generic_const_exprs)]
|
|
#![allow(incomplete_features, unused_parens, unused_braces)]
|
|
|
|
fn zero_init<const N: usize>() -> Substs1<{{ N }}>
|
|
where
|
|
[u8; {{ N }}]: ,
|
|
{
|
|
Substs1([0; {{ N }}])
|
|
}
|
|
|
|
struct Substs1<const N: usize>([u8; {{ N }}])
|
|
where
|
|
[(); {{ N }}]: ;
|
|
|
|
fn substs2<const M: usize>() -> Substs1<{{ M }}> {
|
|
zero_init::<{{ M }}>()
|
|
}
|
|
|
|
fn substs3<const L: usize>() -> Substs1<{{ L }}> {
|
|
substs2::<{{ L }}>()
|
|
}
|
|
|
|
fn main() {
|
|
assert_eq!(substs3::<2>().0, [0; 2]);
|
|
}
|
|
|
|
// Test that the implicit ``{{ L }}`` bound on ``substs3`` satisfies the
|
|
// ``{{ N }}`` bound on ``Substs1``
|
|
// FIXME(generic_const_exprs): come up with a less brittle test for this using assoc consts
|
|
// once normalization is implemented for them.
|