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_ELEMENT_H
10 #define _LIBCPP___ALGORITHM_MIN_ELEMENT_H
11 
12 #include <__config>
13 #include <__iterator/iterator_traits.h>
14 
15 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
16 #pragma GCC system_header
17 #endif
18 
19 _LIBCPP_PUSH_MACROS
20 #include <__undef_macros>
21 
22 _LIBCPP_BEGIN_NAMESPACE_STD
23 
24 template <class _ForwardIterator, class _Compare>
25 _LIBCPP_NODISCARD_EXT inline
26 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
27 _ForwardIterator
28 min_element(_ForwardIterator __first, _ForwardIterator __last, _Compare __comp)
29 {
30     static_assert(__is_cpp17_forward_iterator<_ForwardIterator>::value,
31         "std::min_element requires a ForwardIterator");
32     if (__first != __last)
33     {
34         _ForwardIterator __i = __first;
35         while (++__i != __last)
36             if (__comp(*__i, *__first))
37                 __first = __i;
38     }
39     return __first;
40 }
41 
42 template <class _ForwardIterator>
43 _LIBCPP_NODISCARD_EXT inline
44 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
45 _ForwardIterator
46 min_element(_ForwardIterator __first, _ForwardIterator __last)
47 {
48     return _VSTD::min_element(__first, __last,
49               __less<typename iterator_traits<_ForwardIterator>::value_type>());
50 }
51 
52 _LIBCPP_END_NAMESPACE_STD
53 
54 _LIBCPP_POP_MACROS
55 
56 #endif // _LIBCPP___ALGORITHM_MIN_ELEMENT_H
57