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//
// cpp11/can_require_not_applicable_free.cpp
// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
//
// Copyright (c) 2003-2025 Christopher M. Kohlhoff (chris at kohlhoff dot com)
//
// Distributed under the Boost Software License, Version 1.0. (See accompanying
// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
//
#include <boost/asio/require.hpp>
#include <cassert>
template <int>
struct prop
{
static constexpr bool is_requirable = true;
};
template <int>
struct object
{
template <int N>
friend constexpr object<N> require(const object&, prop<N>)
{
return object<N>();
}
};
int main()
{
static_assert(!boost::asio::can_require<object<1>, prop<2>>::value, "");
static_assert(!boost::asio::can_require<object<1>, prop<2>, prop<3>>::value, "");
static_assert(!boost::asio::can_require<object<1>, prop<2>, prop<3>, prop<4>>::value, "");
static_assert(!boost::asio::can_require<const object<1>, prop<2>>::value, "");
static_assert(!boost::asio::can_require<const object<1>, prop<2>, prop<3>>::value, "");
static_assert(!boost::asio::can_require<const object<1>, prop<2>, prop<3>, prop<4>>::value, "");
}
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