indirectly_comparable.h 1.0 KB

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  1. // -*- C++ -*-
  2. //===----------------------------------------------------------------------===//
  3. //
  4. // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
  5. // See https://llvm.org/LICENSE.txt for license information.
  6. // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  7. //
  8. //===----------------------------------------------------------------------===//
  9. #ifndef _LIBCPP___ITERATOR_INDIRECTLY_COMPARABLE_H
  10. #define _LIBCPP___ITERATOR_INDIRECTLY_COMPARABLE_H
  11. #include <__config>
  12. #include <__functional/identity.h>
  13. #include <__iterator/concepts.h>
  14. #include <__iterator/projected.h>
  15. #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
  16. # pragma GCC system_header
  17. #endif
  18. _LIBCPP_BEGIN_NAMESPACE_STD
  19. #if _LIBCPP_STD_VER >= 20
  20. template <class _I1, class _I2, class _Rp, class _P1 = identity, class _P2 = identity>
  21. concept indirectly_comparable =
  22. indirect_binary_predicate<_Rp, projected<_I1, _P1>, projected<_I2, _P2>>;
  23. #endif // _LIBCPP_STD_VER >= 20
  24. _LIBCPP_END_NAMESPACE_STD
  25. #endif // _LIBCPP___ITERATOR_INDIRECTLY_COMPARABLE_H