| //===----------------------------------------------------------------------===// |
| // |
| // 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*>()); |