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//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
// UNSUPPORTED: c++03, c++11, c++14, c++17
// template<class I1, class I2, class Out,
// class R = ranges::less, class P1 = identity, class P2 = identity>
// concept mergeable = see below; // since C++20
#include <iterator>
#include "test_macros.h"
template <class I1, class I2, class O>
void test_subsumption() requires std::input_iterator<I1> && std::input_iterator<I2>;
template <class I1, class I2, class O>
void test_subsumption() requires std::weakly_incrementable<O>;
template <class I1, class I2, class O>
void test_subsumption() requires std::indirectly_copyable<I1, O> && std::indirectly_copyable<I2, O>;
template <class I1, class I2, class O>
void test_subsumption() requires std::indirect_strict_weak_order<I1, I2>;
template <class I1, class I2, class O>
constexpr bool test_subsumption() requires std::mergeable<I1, I2, O> {
return true;
}
static_assert(test_subsumption<int*, int*, int*>());
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