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1 //===----------------------------------------------------------------------===//
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2 //
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3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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4 // See https://llvm.org/LICENSE.txt for license information.
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5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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6 //
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7 //===----------------------------------------------------------------------===//
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8
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9 #ifndef _LIBCPP___ALGORITHM_MINMAX_H
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10 #define _LIBCPP___ALGORITHM_MINMAX_H
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11
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236
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12 #include <__algorithm/comp.h>
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13 #include <__algorithm/minmax_element.h>
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14 #include <__config>
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236
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15 #include <__functional/identity.h>
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16 #include <__type_traits/is_callable.h>
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17 #include <__utility/pair.h>
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223
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18 #include <initializer_list>
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19
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20 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
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21 # pragma GCC system_header
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221
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22 #endif
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23
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24 _LIBCPP_BEGIN_NAMESPACE_STD
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25
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26 template<class _Tp, class _Compare>
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27 _LIBCPP_NODISCARD_EXT inline
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236
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28 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX14
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29 pair<const _Tp&, const _Tp&>
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30 minmax(_LIBCPP_LIFETIMEBOUND const _Tp& __a, _LIBCPP_LIFETIMEBOUND const _Tp& __b, _Compare __comp)
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221
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31 {
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32 return __comp(__b, __a) ? pair<const _Tp&, const _Tp&>(__b, __a) :
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33 pair<const _Tp&, const _Tp&>(__a, __b);
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34 }
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35
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36 template<class _Tp>
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37 _LIBCPP_NODISCARD_EXT inline
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236
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38 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX14
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39 pair<const _Tp&, const _Tp&>
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40 minmax(_LIBCPP_LIFETIMEBOUND const _Tp& __a, _LIBCPP_LIFETIMEBOUND const _Tp& __b)
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221
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41 {
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42 return std::minmax(__a, __b, __less<>());
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221
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43 }
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44
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45 #ifndef _LIBCPP_CXX03_LANG
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46
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47 template<class _Tp, class _Compare>
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236
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48 _LIBCPP_NODISCARD_EXT inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14
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49 pair<_Tp, _Tp> minmax(initializer_list<_Tp> __t, _Compare __comp) {
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50 static_assert(__is_callable<_Compare, _Tp, _Tp>::value, "The comparator has to be callable");
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51 __identity __proj;
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52 auto __ret = std::__minmax_element_impl(__t.begin(), __t.end(), __comp, __proj);
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53 return pair<_Tp, _Tp>(*__ret.first, *__ret.second);
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221
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54 }
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55
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56 template<class _Tp>
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57 _LIBCPP_NODISCARD_EXT inline
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236
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58 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX14
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221
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59 pair<_Tp, _Tp>
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60 minmax(initializer_list<_Tp> __t)
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61 {
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62 return std::minmax(__t, __less<>());
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221
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63 }
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64
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65 #endif // _LIBCPP_CXX03_LANG
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66
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67 _LIBCPP_END_NAMESPACE_STD
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68
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69 #endif // _LIBCPP___ALGORITHM_MINMAX_H
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