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19 lines
504 B
Rust
19 lines
504 B
Rust
// issue rust-lang/rust#111667
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// ICE failed to resolve instance for <[f32; 2] as CrossProduct ..
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//@ check-pass
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#![feature(generic_const_exprs)]
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#![allow(incomplete_features)]
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pub trait CrossProduct<'a, T, R> {
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fn cross(&'a self, t: &'a T) -> R;
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}
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impl<'a, T, U, const N: usize> CrossProduct<'a, [U; N], [(&'a T, &'a U); N * N]> for [T; N] {
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fn cross(&'a self, us: &'a [U; N]) -> [(&'a T, &'a U); N * N] {
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std::array::from_fn(|i| (&self[i / N], &us[i % N]))
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}
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}
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pub fn main() {}
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