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rust/src/test/ui/const-generics/array-size-in-generic-struct-param.rs

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// run-pass
#![feature(const_generics)]
//~^ WARN the feature `const_generics` is incomplete and may cause the compiler to crash
#[allow(dead_code)]
struct ArithArrayLen<const N: usize>([u32; 0 + N]); // ok
#[derive(PartialEq, Eq)]
struct Config {
arr_size: usize,
}
struct B<const CFG: Config> {
arr: [u8; CFG.arr_size], // ok
}
const C: Config = Config { arr_size: 5 };
fn main() {
let b = B::<C> { arr: [1, 2, 3, 4, 5] };
assert_eq!(b.arr.len(), 5);
}