#pragma once
#include "foundation.hpp"
namespace library = std;
using std::copyable;
namespace demo {
template<class T>
concept Sized = requires(const T value) {
    { value.size() } -> library::integral;
    requires library::same_as<decltype(value.size()), unsigned>;
};

template<class T>
concept Flexible = (Arithmetic<T> || Sized<T>) && requires(T value) {
    requires copyable<T>;
};

template<class T>
concept Outer = Flexible<T> || Addable<T>;
}