tests/ui/generic-const-items/associated-const-equality.rs

//@ check-pass

#![feature(generic_const_items, min_generic_const_args)]
#![feature(associated_const_equality, adt_const_params)]
#![allow(incomplete_features)]

trait Owner {
    #[type_const]
    const C<const N: u32>: u32;
    #[type_const]
    const K<const N: u32>: u32;
    // #[type_const]
    // const Q<T>: Maybe<T>;
}

impl Owner for () {
    #[type_const]
    const C<const N: u32>: u32 = N;
    #[type_const]
    const K<const N: u32>: u32 = const { 99 + 1 };
    // FIXME(mgca): re-enable once we properly support ctors and generics on paths
    // #[type_const]
    // const Q<T>: Maybe<T> = Maybe::Nothing;
}

fn take0<const N: u32>(_: impl Owner<C<N> = { N }>) {}
fn take1(_: impl Owner<K<99> = 100>) {}
// FIXME(mgca): re-enable once we properly support ctors and generics on paths
// fn take2(_: impl Owner<Q<()> = { Maybe::Just(()) }>) {}

fn main() {
    take0::<128>(());
    take1(());
}

#[derive(PartialEq, Eq, std::marker::ConstParamTy)]
enum Maybe<T> {
    Nothing,
    Just(T),
}