1e78f53d1SNikolas Klauser //===----------------------------------------------------------------------===// 2e78f53d1SNikolas Klauser // 3e78f53d1SNikolas Klauser // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4e78f53d1SNikolas Klauser // See https://llvm.org/LICENSE.txt for license information. 5e78f53d1SNikolas Klauser // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6e78f53d1SNikolas Klauser // 7e78f53d1SNikolas Klauser //===----------------------------------------------------------------------===// 8e78f53d1SNikolas Klauser 9*ce777190SNikolas Klauser #ifndef _LIBCPP___CXX03___ALGORITHM_MINMAX_H 10*ce777190SNikolas Klauser #define _LIBCPP___CXX03___ALGORITHM_MINMAX_H 11e78f53d1SNikolas Klauser 1273fbae83SNikolas Klauser #include <__cxx03/__algorithm/comp.h> 1373fbae83SNikolas Klauser #include <__cxx03/__algorithm/minmax_element.h> 1473fbae83SNikolas Klauser #include <__cxx03/__config> 1573fbae83SNikolas Klauser #include <__cxx03/__functional/identity.h> 1673fbae83SNikolas Klauser #include <__cxx03/__type_traits/is_callable.h> 1773fbae83SNikolas Klauser #include <__cxx03/__utility/pair.h> 1873fbae83SNikolas Klauser #include <__cxx03/initializer_list> 19e78f53d1SNikolas Klauser 20e78f53d1SNikolas Klauser #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 21e78f53d1SNikolas Klauser # pragma GCC system_header 22e78f53d1SNikolas Klauser #endif 23e78f53d1SNikolas Klauser 24e78f53d1SNikolas Klauser _LIBCPP_BEGIN_NAMESPACE_STD 25e78f53d1SNikolas Klauser 26e78f53d1SNikolas Klauser template <class _Tp, class _Compare> 27e78f53d1SNikolas Klauser _LIBCPP_NODISCARD inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 pair<const _Tp&, const _Tp&> 28e78f53d1SNikolas Klauser minmax(_LIBCPP_LIFETIMEBOUND const _Tp& __a, _LIBCPP_LIFETIMEBOUND const _Tp& __b, _Compare __comp) { 29e78f53d1SNikolas Klauser return __comp(__b, __a) ? pair<const _Tp&, const _Tp&>(__b, __a) : pair<const _Tp&, const _Tp&>(__a, __b); 30e78f53d1SNikolas Klauser } 31e78f53d1SNikolas Klauser 32e78f53d1SNikolas Klauser template <class _Tp> 33e78f53d1SNikolas Klauser _LIBCPP_NODISCARD inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 pair<const _Tp&, const _Tp&> 34e78f53d1SNikolas Klauser minmax(_LIBCPP_LIFETIMEBOUND const _Tp& __a, _LIBCPP_LIFETIMEBOUND const _Tp& __b) { 35e78f53d1SNikolas Klauser return std::minmax(__a, __b, __less<>()); 36e78f53d1SNikolas Klauser } 37e78f53d1SNikolas Klauser 38e78f53d1SNikolas Klauser #ifndef _LIBCPP_CXX03_LANG 39e78f53d1SNikolas Klauser 40e78f53d1SNikolas Klauser template <class _Tp, class _Compare> 41e78f53d1SNikolas Klauser _LIBCPP_NODISCARD inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 pair<_Tp, _Tp> 42e78f53d1SNikolas Klauser minmax(initializer_list<_Tp> __t, _Compare __comp) { 43e78f53d1SNikolas Klauser static_assert(__is_callable<_Compare, _Tp, _Tp>::value, "The comparator has to be callable"); 44e78f53d1SNikolas Klauser __identity __proj; 45e78f53d1SNikolas Klauser auto __ret = std::__minmax_element_impl(__t.begin(), __t.end(), __comp, __proj); 46e78f53d1SNikolas Klauser return pair<_Tp, _Tp>(*__ret.first, *__ret.second); 47e78f53d1SNikolas Klauser } 48e78f53d1SNikolas Klauser 49e78f53d1SNikolas Klauser template <class _Tp> 50e78f53d1SNikolas Klauser _LIBCPP_NODISCARD inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 pair<_Tp, _Tp> 51e78f53d1SNikolas Klauser minmax(initializer_list<_Tp> __t) { 52e78f53d1SNikolas Klauser return std::minmax(__t, __less<>()); 53e78f53d1SNikolas Klauser } 54e78f53d1SNikolas Klauser 55e78f53d1SNikolas Klauser #endif // _LIBCPP_CXX03_LANG 56e78f53d1SNikolas Klauser 57e78f53d1SNikolas Klauser _LIBCPP_END_NAMESPACE_STD 58e78f53d1SNikolas Klauser 59*ce777190SNikolas Klauser #endif // _LIBCPP___CXX03___ALGORITHM_MINMAX_H 60