#![allow(unused)]

#[macro_use]
extern crate qdowncast;

use qdowncast::QDowncastable;
use std::any::Any;

trait Store: Any {
    type Id: Any;
}
impl<Id, T> QDowncastable<T> for Store<Id = Id> 
    where Id: Any, T: Store<Id = Id>
{
    qdowncastable_items!(T);
}
impl<Id: Any> Store<Id = Id> {
    qdowncast_method_items!();
}

pub struct MyStore;
impl Store for MyStore {
    type Id = usize;
}

fn as_mystore<'a>(store: &'a Store<Id = usize>) -> Option<&'a MyStore> {
    store.downcast_ref()
}