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35 lines
659 B
Rust
35 lines
659 B
Rust
//@ run-pass
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#![feature(generic_const_exprs)]
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#![allow(incomplete_features)]
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fn zero_init<const N: usize>() -> Substs1<N>
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where
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[u8; N + 1]: ,
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{
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Substs1([0; N + 1])
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}
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struct Substs1<const N: usize>([u8; N + 1])
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where
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[(); N + 1]: ;
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fn substs2<const M: usize>() -> Substs1<{ M * 2 }>
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where
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[(); { M * 2 } + 1]: ,
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{
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zero_init::<{ M * 2 }>()
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}
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fn substs3<const L: usize>() -> Substs1<{ (L - 1) * 2 }>
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where
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[(); (L - 1) * 2 + 1]: ,
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{
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substs2::<{ L - 1 }>()
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}
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fn main() {
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assert_eq!(substs3::<2>().0, [0; 3]);
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}
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// Test that the ``{ (L - 1) * 2 + 1 }`` bound on ``substs3`` satisfies the
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// ``{ N + 1 }`` bound on ``Substs1``
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