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- // Copyright 2020 The Chromium Authors. All rights reserved.
- // Use of this source code is governed by a BSD-style license that can be
- // found in the LICENSE file.
- #ifndef BASE_RANGES_FUNCTIONAL_H_
- #define BASE_RANGES_FUNCTIONAL_H_
- #include <functional>
- #include <type_traits>
- #include <utility>
- namespace base {
- namespace ranges {
- // Simplified implementations of C++20's std::ranges comparison function
- // objects. As opposed to the std::ranges implementation, these versions do not
- // constrain the passed-in types.
- //
- // Reference: https://wg21.link/range.cmp
- using equal_to = std::equal_to<>;
- using not_equal_to = std::not_equal_to<>;
- using greater = std::greater<>;
- using less = std::less<>;
- using greater_equal = std::greater_equal<>;
- using less_equal = std::less_equal<>;
- } // namespace ranges
- } // namespace base
- #endif // BASE_RANGES_FUNCTIONAL_H_
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