libcxx/test/std/utilities/function.objects/comparisons/transparent_three_way.compile.pass.cpp


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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

#include <functional>

template<class T>
concept Transparent = requires {
    typename T::is_transparent;
};

static_assert(Transparent<std::compare_three_way>);