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 10 #ifndef _LIBCPP___ITERATOR_INDIRECTLY_COMPARABLE_H 11 #define _LIBCPP___ITERATOR_INDIRECTLY_COMPARABLE_H 12 13 #include <__config> 14 #include <__functional/identity.h> 15 #include <__iterator/concepts.h> 16 #include <__iterator/projected.h> 17 18 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 19 # pragma GCC system_header 20 #endif 21 22 _LIBCPP_BEGIN_NAMESPACE_STD 23 24 #if _LIBCPP_STD_VER >= 20 25 26 template <class _I1, class _I2, class _Rp, class _P1 = identity, class _P2 = identity> 27 concept indirectly_comparable = indirect_binary_predicate<_Rp, projected<_I1, _P1>, projected<_I2, _P2>>; 28 29 #endif // _LIBCPP_STD_VER >= 20 30 31 _LIBCPP_END_NAMESPACE_STD 32 33 #endif // _LIBCPP___ITERATOR_INDIRECTLY_COMPARABLE_H 34