| 1 | //===----------------------------------------------------------------------===// |
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| 2 | // |
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| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
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| 4 | // See https://llvm.org/LICENSE.txt for license information. |
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| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
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| 6 | // |
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| 7 | //===----------------------------------------------------------------------===// |
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| 8 | |
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| 9 | // UNSUPPORTED: c++03, c++11, c++14, c++17 |
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| 10 | |
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| 11 | // template<class I1, class I2, class Out, |
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| 12 | // class R = ranges::less, class P1 = identity, class P2 = identity> |
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| 13 | // concept mergeable = see below; // since C++20 |
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| 14 | |
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| 15 | #include <iterator> |
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| 16 | |
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| 17 | #include "test_macros.h" |
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| 18 | |
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| 19 | template <class I1, class I2, class O> |
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| 20 | void test_subsumption() requires std::input_iterator<I1> && std::input_iterator<I2>; |
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| 21 | |
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| 22 | template <class I1, class I2, class O> |
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| 23 | void test_subsumption() requires std::weakly_incrementable<O>; |
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| 24 | |
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| 25 | template <class I1, class I2, class O> |
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| 26 | void test_subsumption() requires std::indirectly_copyable<I1, O> && std::indirectly_copyable<I2, O>; |
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| 27 | |
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| 28 | template <class I1, class I2, class O> |
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| 29 | void test_subsumption() requires std::indirect_strict_weak_order<I1, I2>; |
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| 30 | |
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| 31 | template <class I1, class I2, class O> |
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| 32 | constexpr bool test_subsumption() requires std::mergeable<I1, I2, O> { |
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| 33 | return true; |
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| 34 | } |
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| 35 | |
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| 36 | static_assert(test_subsumption<int*, int*, int*>()); |
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| 37 | |
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