xref: /openbsd-src/gnu/llvm/libcxx/include/__algorithm/count.h (revision 4bdff4bed0e3d54e55670334c7d0077db4170f86)
176d0caaeSpatrick // -*- C++ -*-
276d0caaeSpatrick //===----------------------------------------------------------------------===//
376d0caaeSpatrick //
476d0caaeSpatrick // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
576d0caaeSpatrick // See https://llvm.org/LICENSE.txt for license information.
676d0caaeSpatrick // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
776d0caaeSpatrick //
876d0caaeSpatrick //===----------------------------------------------------------------------===//
976d0caaeSpatrick 
1076d0caaeSpatrick #ifndef _LIBCPP___ALGORITHM_COUNT_H
1176d0caaeSpatrick #define _LIBCPP___ALGORITHM_COUNT_H
1276d0caaeSpatrick 
1376d0caaeSpatrick #include <__config>
1476d0caaeSpatrick #include <__iterator/iterator_traits.h>
1576d0caaeSpatrick 
1676d0caaeSpatrick #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
1776d0caaeSpatrick #  pragma GCC system_header
1876d0caaeSpatrick #endif
1976d0caaeSpatrick 
2076d0caaeSpatrick _LIBCPP_BEGIN_NAMESPACE_STD
2176d0caaeSpatrick 
2276d0caaeSpatrick template <class _InputIterator, class _Tp>
23*4bdff4beSrobert _LIBCPP_NODISCARD_EXT inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_SINCE_CXX20
2476d0caaeSpatrick     typename iterator_traits<_InputIterator>::difference_type
count(_InputIterator __first,_InputIterator __last,const _Tp & __value)25*4bdff4beSrobert     count(_InputIterator __first, _InputIterator __last, const _Tp& __value) {
2676d0caaeSpatrick   typename iterator_traits<_InputIterator>::difference_type __r(0);
2776d0caaeSpatrick   for (; __first != __last; ++__first)
28*4bdff4beSrobert     if (*__first == __value)
2976d0caaeSpatrick       ++__r;
3076d0caaeSpatrick   return __r;
3176d0caaeSpatrick }
3276d0caaeSpatrick 
3376d0caaeSpatrick _LIBCPP_END_NAMESPACE_STD
3476d0caaeSpatrick 
3576d0caaeSpatrick #endif // _LIBCPP___ALGORITHM_COUNT_H
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