File: enum-discr.rs

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//! check that const eval can observe associated types of opaque types.
//@ check-pass
trait MyTrait: Copy {
    const ASSOC: usize;
}

impl MyTrait for u8 {
    const ASSOC: usize = 32;
}

const fn yeet() -> impl MyTrait {
    0u8
}

const fn output<T: MyTrait>(_: T) -> usize {
    <T as MyTrait>::ASSOC
}

#[repr(usize)]
enum Foo {
    Bar = output(yeet()),
}

fn main() {
    println!("{}", Foo::Bar as usize);
}