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The C and C++ Include Header Files

cat -n /usr/include/c++/15/experimental/algorithm

     1	// <experimental/algorithm> -*- C++ -*-
     2	
     3	// Copyright (C) 2014-2025 Free Software Foundation, Inc.
     4	//
     5	// This file is part of the GNU ISO C++ Library.  This library is free
     6	// software; you can redistribute it and/or modify it under the
     7	// terms of the GNU General Public License as published by the
     8	// Free Software Foundation; either version 3, or (at your option)
     9	// any later version.
    10	
    11	// This library is distributed in the hope that it will be useful,
    12	// but WITHOUT ANY WARRANTY; without even the implied warranty of
    13	// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    14	// GNU General Public License for more details.
    15	
    16	// Under Section 7 of GPL version 3, you are granted additional
    17	// permissions described in the GCC Runtime Library Exception, version
    18	// 3.1, as published by the Free Software Foundation.
    19	
    20	// You should have received a copy of the GNU General Public License and
    21	// a copy of the GCC Runtime Library Exception along with this program;
    22	// see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
    23	// <http://www.gnu.org/licenses/>.
    24	
    25	/** @file experimental/algorithm
    26	 *  This is a TS C++ Library header.
    27	 *  @ingroup libfund-ts
    28	 */
    29	
    30	#ifndef _GLIBCXX_EXPERIMENTAL_ALGORITHM
    31	#define _GLIBCXX_EXPERIMENTAL_ALGORITHM 1
    32	
    33	#ifdef _GLIBCXX_SYSHDR
    34	#pragma GCC system_header
    35	#endif
    36	
    37	#include <bits/requires_hosted.h> // experimental is currently omitted
    38	
    39	#if __cplusplus >= 201402L
    40	
    41	#include <algorithm>
    42	#include <experimental/bits/lfts_config.h>
    43	#include <experimental/random>
    44	
    45	namespace std _GLIBCXX_VISIBILITY(default)
    46	{
    47	_GLIBCXX_BEGIN_NAMESPACE_VERSION
    48	
    49	namespace experimental
    50	{
    51	inline namespace fundamentals_v2
    52	{
    53	  template<typename _ForwardIterator, typename _Searcher>
    54	    inline _ForwardIterator
    55	    search(_ForwardIterator __first, _ForwardIterator __last,
    56		   const _Searcher& __searcher)
    57	    { return __searcher(__first, __last); }
    58	
    59	#define __cpp_lib_experimental_sample 201402
    60	
    61	  /// Take a random sample from a population.
    62	  template<typename _PopulationIterator, typename _SampleIterator,
    63	           typename _Distance, typename _UniformRandomNumberGenerator>
    64	    _SampleIterator
    65	    sample(_PopulationIterator __first, _PopulationIterator __last,
    66		   _SampleIterator __out, _Distance __n,
    67		   _UniformRandomNumberGenerator&& __g)
    68	    {
    69	      using __pop_cat = typename
    70		std::iterator_traits<_PopulationIterator>::iterator_category;
    71	      using __samp_cat = typename
    72		std::iterator_traits<_SampleIterator>::iterator_category;
    73	
    74	      static_assert(
    75		  __or_<is_convertible<__pop_cat, forward_iterator_tag>,
    76			is_convertible<__samp_cat, random_access_iterator_tag>>::value,
    77		  "output range must use a RandomAccessIterator when input range"
    78		  " does not meet the ForwardIterator requirements");
    79	
    80	      static_assert(is_integral<_Distance>::value,
    81			    "sample size must be an integer type");
    82	
    83	      typename iterator_traits<_PopulationIterator>::difference_type __d = __n;
    84	      return _GLIBCXX_STD_A::
    85		__sample(__first, __last, __pop_cat{}, __out, __samp_cat{}, __d,
    86			 std::forward<_UniformRandomNumberGenerator>(__g));
    87	    }
    88	
    89	  template<typename _PopulationIterator, typename _SampleIterator,
    90	           typename _Distance>
    91	    inline _SampleIterator
    92	    sample(_PopulationIterator __first, _PopulationIterator __last,
    93		   _SampleIterator __out, _Distance __n)
    94	    {
    95	      return experimental::sample(__first, __last, __out, __n,
    96					  _S_randint_engine());
    97	    }
    98	
    99	  template<typename _RandomAccessIterator>
   100	    inline void
   101	    shuffle(_RandomAccessIterator __first, _RandomAccessIterator __last)
   102	    { return std::shuffle(__first, __last, _S_randint_engine()); }
   103	
   104	} // namespace fundamentals_v2
   105	} // namespace experimental
   106	
   107	_GLIBCXX_END_NAMESPACE_VERSION
   108	} // namespace std
   109	
   110	#endif // C++14
   111	
   112	#endif // _GLIBCXX_EXPERIMENTAL_ALGORITHM