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// issue: rust-lang/rust#106423
// ICE collection encountered polymorphic constant: UnevaluatedConst {..}
//@ edition:2021
//@ check-pass
#![feature(generic_const_exprs)]
#![allow(incomplete_features)]
#![allow(unused)]
use core::mem::MaybeUninit;
pub struct Arr<T, const N: usize> {
v: [MaybeUninit<T>; N],
}
impl<T, const N: usize> Arr<T, N> {
const ELEM: MaybeUninit<T> = MaybeUninit::uninit();
const INIT: [MaybeUninit<T>; N] = [Self::ELEM; N]; // important for optimization of `new`
fn new() -> Self {
Arr { v: Self::INIT }
}
}
pub struct BaFormatFilter<const N: usize> {}
pub enum DigitalFilter<const N: usize>
where
[(); N * 2 + 1]: Sized,
[(); N * 2]: Sized,
{
Ba(BaFormatFilter<{ N * 2 + 1 }>),
}
pub fn iirfilter_st_copy<const N: usize, const M: usize>(_: [f32; M]) -> DigitalFilter<N>
where
[(); N * 2 + 1]: Sized,
[(); N * 2]: Sized,
{
let zpk = zpk2tf_st(&Arr::<f32, { N * 2 }>::new(), &Arr::<f32, { N * 2 }>::new());
DigitalFilter::Ba(zpk)
}
pub fn zpk2tf_st<const N: usize>(_z: &Arr<f32, N>, _p: &Arr<f32, N>) -> BaFormatFilter<{ N + 1 }>
where
[(); N + 1]: Sized,
{
BaFormatFilter {}
}
fn main() {
iirfilter_st_copy::<4, 2>([10., 50.]);
}
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