libcxx/include/__algorithm/min.h

   1 //===----------------------------------------------------------------------===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8
   9 #ifndef _LIBCPP___ALGORITHM_MIN_H
  10 #define _LIBCPP___ALGORITHM_MIN_H
  11
  12 #include <__algorithm/comp.h>
  13 #include <__algorithm/comp_ref_type.h>
  14 #include <__algorithm/min_element.h>
  15 #include <__config>
  16 #include <initializer_list>
  17
  18 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
  19 #  pragma GCC system_header
  20 #endif
  21
  22 _LIBCPP_PUSH_MACROS
  23 #include <__undef_macros>
  24
  25 _LIBCPP_BEGIN_NAMESPACE_STD
  26
  27 template <class _Tp, class _Compare>
  28 _LIBCPP_NODISCARD_EXT inline
  29 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX14
  30 const _Tp&
  31 min(_LIBCPP_LIFETIMEBOUND const _Tp& __a, _LIBCPP_LIFETIMEBOUND const _Tp& __b, _Compare __comp)
  32 {
  33     return __comp(__b, __a) ? __b : __a;
  34 }
  35
  36 template <class _Tp>
  37 _LIBCPP_NODISCARD_EXT inline
  38 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX14
  39 const _Tp&
  40 min(_LIBCPP_LIFETIMEBOUND const _Tp& __a, _LIBCPP_LIFETIMEBOUND const _Tp& __b)
  41 {
  42     return _VSTD::min(__a, __b, __less<>());
  43 }
  44
  45 #ifndef _LIBCPP_CXX03_LANG
  46
  47 template<class _Tp, class _Compare>
  48 _LIBCPP_NODISCARD_EXT inline
  49 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX14
  50 _Tp
  51 min(initializer_list<_Tp> __t, _Compare __comp)
  52 {
  53     return *_VSTD::__min_element<__comp_ref_type<_Compare> >(__t.begin(), __t.end(), __comp);
  54 }
  55
  56 template<class _Tp>
  57 _LIBCPP_NODISCARD_EXT inline
  58 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX14
  59 _Tp
  60 min(initializer_list<_Tp> __t)
  61 {
  62     return *_VSTD::min_element(__t.begin(), __t.end(), __less<>());
  63 }
  64
  65 #endif // _LIBCPP_CXX03_LANG
  66
  67 _LIBCPP_END_NAMESPACE_STD
  68
  69 _LIBCPP_POP_MACROS
  70
  71 #endif // _LIBCPP___ALGORITHM_MIN_H