d2baefae68
All supported compilers that support C++20 now support concepts. So, remove `_LIB_LIBCPP_HAS_NO_CONCEPTS` in favor of `_LIBCPP_STD_VER > 17`. Similarly in the tests, remove `// UNSUPPORTED: libcpp-no-concepts`. Differential Revision: https://reviews.llvm.org/D121528
37 lines
1.3 KiB
C++
37 lines
1.3 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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// UNSUPPORTED: c++03, c++11, c++14, c++17
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// template<class I1, class I2, class Out,
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// class R = ranges::less, class P1 = identity, class P2 = identity>
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// concept mergeable = see below; // since C++20
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#include <iterator>
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#include "test_macros.h"
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template <class I1, class I2, class O>
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void test_subsumption() requires std::input_iterator<I1> && std::input_iterator<I2>;
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template <class I1, class I2, class O>
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void test_subsumption() requires std::weakly_incrementable<O>;
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template <class I1, class I2, class O>
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void test_subsumption() requires std::indirectly_copyable<I1, O> && std::indirectly_copyable<I2, O>;
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template <class I1, class I2, class O>
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void test_subsumption() requires std::indirect_strict_weak_order<I1, I2>;
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template <class I1, class I2, class O>
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constexpr bool test_subsumption() requires std::mergeable<I1, I2, O> {
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return true;
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}
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static_assert(test_subsumption<int*, int*, int*>());
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