37 lines
678 B
Rust
37 lines
678 B
Rust
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//@ compile-flags: -Zmir-opt-level=3
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//@ check-pass
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#![feature(generic_const_exprs)]
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//~^ WARN the feature `generic_const_exprs` is incomplete
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#[inline(always)]
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fn from_fn_1<const N: usize, F: FnMut(usize) -> f32>(mut f: F) -> [f32; N] {
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let mut result = [0.0; N];
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let mut i = 0;
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while i < N {
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result[i] = f(i);
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i += 1;
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}
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result
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}
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pub struct TestArray<const N: usize>
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where
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[(); N / 2]:,
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{
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array: [f32; N / 2],
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}
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impl<const N: usize> TestArray<N>
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where
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[(); N / 2]:,
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{
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fn from_fn_2<F: FnMut(usize) -> f32>(f: F) -> Self {
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Self { array: from_fn_1(f) }
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}
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}
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fn main() {
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TestArray::<4>::from_fn_2(|i| 0.0);
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}
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