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<a href="a16917.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> // <experimental/iterator> -*- C++ -*-</div><div class="line"><a name="l00002"></a><span class="lineno"> 2</span> </div><div class="line"><a name="l00003"></a><span class="lineno"> 3</span> // Copyright (C) 2015-2018 Free Software Foundation, Inc.</div><div class="line"><a name="l00004"></a><span class="lineno"> 4</span> //</div><div class="line"><a name="l00005"></a><span class="lineno"> 5</span> // This file is part of the GNU ISO C++ Library. This library is free</div><div class="line"><a name="l00006"></a><span class="lineno"> 6</span> // software; you can redistribute it and/or modify it under the</div><div class="line"><a name="l00007"></a><span class="lineno"> 7</span> // terms of the GNU General Public License as published by the</div><div class="line"><a name="l00008"></a><span class="lineno"> 8</span> // Free Software Foundation; either version 3, or (at your option)</div><div class="line"><a name="l00009"></a><span class="lineno"> 9</span> // any later version.</div><div class="line"><a name="l00010"></a><span class="lineno"> 10</span> </div><div class="line"><a name="l00011"></a><span class="lineno"> 11</span> // This library is distributed in the hope that it will be useful,</div><div class="line"><a name="l00012"></a><span class="lineno"> 12</span> // but WITHOUT ANY WARRANTY; without even the implied warranty of</div><div class="line"><a name="l00013"></a><span class="lineno"> 13</span> // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the</div><div class="line"><a name="l00014"></a><span class="lineno"> 14</span> // GNU General Public License for more details.</div><div class="line"><a name="l00015"></a><span class="lineno"> 15</span> </div><div class="line"><a name="l00016"></a><span class="lineno"> 16</span> // Under Section 7 of GPL version 3, you are granted additional</div><div class="line"><a name="l00017"></a><span class="lineno"> 17</span> // permissions described in the GCC Runtime Library Exception, version</div><div class="line"><a name="l00018"></a><span class="lineno"> 18</span> // 3.1, as published by the Free Software Foundation.</div><div class="line"><a name="l00019"></a><span class="lineno"> 19</span> </div><div class="line"><a name="l00020"></a><span class="lineno"> 20</span> // You should have received a copy of the GNU General Public License and</div><div class="line"><a name="l00021"></a><span class="lineno"> 21</span> // a copy of the GCC Runtime Library Exception along with this program;</div><div class="line"><a name="l00022"></a><span class="lineno"> 22</span> // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see</div><div class="line"><a name="l00023"></a><span class="lineno"> 23</span> // <http://www.gnu.org/licenses/>.</div><div class="line"><a name="l00024"></a><span class="lineno"> 24</span> </div><div class="line"><a name="l00025"></a><span class="lineno"> 25</span> /** @file experimental/iterator</div><div class="line"><a name="l00026"></a><span class="lineno"> 26</span>  * This is a TS C++ Library header.</div><div class="line"><a name="l00027"></a><span class="lineno"> 27</span>  */</div><div class="line"><a name="l00028"></a><span class="lineno"> 28</span> </div><div class="line"><a name="l00029"></a><span class="lineno"> 29</span> //</div><div class="line"><a name="l00030"></a><span class="lineno"> 30</span> // N4336 Working Draft, C++ Extensions for Library Fundamentals, Version 2</div><div class="line"><a name="l00031"></a><span class="lineno"> 31</span> //</div><div class="line"><a name="l00032"></a><span class="lineno"> 32</span> </div><div class="line"><a name="l00033"></a><span class="lineno"> 33</span> #ifndef _GLIBCXX_EXPERIMENTAL_ITERATOR</div><div class="line"><a name="l00034"></a><span class="lineno"> 34</span> #define _GLIBCXX_EXPERIMENTAL_ITERATOR 1</div><div class="line"><a name="l00035"></a><span class="lineno"> 35</span> </div><div class="line"><a name="l00036"></a><span class="lineno"> 36</span> #pragma GCC system_header</div><div class="line"><a name="l00037"></a><span class="lineno"> 37</span> </div><div class="line"><a name="l00038"></a><span class="lineno"> 38</span> #if __cplusplus >= 201402L</div><div class="line"><a name="l00039"></a><span class="lineno"> 39</span> </div><div class="line"><a name="l00040"></a><span class="lineno"> 40</span> #include <iterator></div><div class="line"><a name="l00041"></a><span class="lineno"> 41</span> #include <iosfwd></div><div class="line"><a name="l00042"></a><span class="lineno"> 42</span> #include <experimental/type_traits></div><div class="line"><a name="l00043"></a><span class="lineno"> 43</span> </div><div class="line"><a name="l00044"></a><span class="lineno"> 44</span> namespace std _GLIBCXX_VISIBILITY(default)</div><div class="line"><a name="l00045"></a><span class="lineno"> 45</span> {</div><div class="line"><a name="l00046"></a><span class="lineno"> 46</span> _GLIBCXX_BEGIN_NAMESPACE_VERSION</div><div class="line"><a name="l00047"></a><span class="lineno"> 47</span> </div><div class="line"><a name="l00048"></a><span class="lineno"> 48</span> namespace experimental</div><div class="line"><a name="l00049"></a><span class="lineno"> 49</span> {</div><div class="line"><a name="l00050"></a><span class="lineno"> 50</span> inline namespace fundamentals_v2</div><div class="line"><a name="l00051"></a><span class="lineno"> 51</span> {</div><div class="line"><a name="l00052"></a><span class="lineno"> 52</span> #define __cpp_lib_experimental_ostream_joiner 201411</div><div class="line"><a name="l00053"></a><span class="lineno"> 53</span> </div><div class="line"><a name="l00054"></a><span class="lineno"> 54</span>  /// Output iterator that inserts a delimiter between elements.</div><div class="line"><a name="l00055"></a><span class="lineno"> 55</span>  template<typename _DelimT, typename _CharT = char,</div><div class="line"><a name="l00056"></a><span class="lineno"> 56</span>  typename _Traits = char_traits<_CharT>></div><div class="line"><a name="l00057"></a><span class="lineno"> 57</span>  class ostream_joiner</div><div class="line"><a name="l00058"></a><span class="lineno"> 58</span>  {</div><div class="line"><a name="l00059"></a><span class="lineno"> 59</span>  public:</div><div class="line"><a name="l00060"></a><span class="lineno"> 60</span>  typedef _CharT char_type;</div><div class="line"><a name="l00061"></a><span class="lineno"> 61</span>  typedef _Traits traits_type;</div><div class="line"><a name="l00062"></a><span class="lineno"> 62</span>  typedef basic_ostream<_CharT, _Traits> ostream_type;</div><div class="line"><a name="l00063"></a><span class="lineno"> 63</span>  typedef output_iterator_tag iterator_category;</div><div class="line"><a name="l00064"></a><span class="lineno"> 64</span>  typedef void value_type;</div><div class="line"><a name="l00065"></a><span class="lineno"> 65</span>  typedef void difference_type;</div><div class="line"><a name="l00066"></a><span class="lineno"> 66</span>  typedef void pointer;</div><div class="line"><a name="l00067"></a><span class="lineno"> 67</span>  typedef void reference;</div><div class="line"><a name="l00068"></a><span class="lineno"> 68</span> </div><div class="line"><a name="l00069"></a><span class="lineno"> 69</span>  ostream_joiner(ostream_type& __os, const _DelimT& __delimiter)</div><div class="line"><a name="l00070"></a><span class="lineno"> 70</span>  noexcept(is_nothrow_copy_constructible_v<_DelimT>)</div><div class="line"><a name="l00071"></a><span class="lineno"> 71</span>  : _M_out(std::__addressof(__os)), _M_delim(__delimiter)</div><div class="line"><a name="l00072"></a><span class="lineno"> 72</span>  { }</div><div class="line"><a name="l00073"></a><span class="lineno"> 73</span> </div><div class="line"><a name="l00074"></a><span class="lineno"> 74</span>  ostream_joiner(ostream_type& __os, _DelimT&& __delimiter)</div><div class="line"><a name="l00075"></a><span class="lineno"> 75</span>  noexcept(is_nothrow_move_constructible_v<_DelimT>)</div><div class="line"><a name="l00076"></a><span class="lineno"> 76</span>  : _M_out(std::__addressof(__os)), _M_delim(std::move(__delimiter))</div><div class="line"><a name="l00077"></a><span class="lineno"> 77</span>  { }</div><div class="line"><a name="l00078"></a><span class="lineno"> 78</span> </div><div class="line"><a name="l00079"></a><span class="lineno"> 79</span>  template<typename _Tp></div><div class="line"><a name="l00080"></a><span class="lineno"> 80</span>  ostream_joiner&</div><div class="line"><a name="l00081"></a><span class="lineno"> 81</span>  operator=(const _Tp& __value)</div><div class="line"><a name="l00082"></a><span class="lineno"> 82</span>  {</div><div class="line"><a name="l00083"></a><span class="lineno"> 83</span>  if (!_M_first)</div><div class="line"><a name="l00084"></a><span class="lineno"> 84</span>  *_M_out << _M_delim;</div><div class="line"><a name="l00085"></a><span class="lineno"> 85</span>  _M_first = false;</div><div class="line"><a name="l00086"></a><span class="lineno"> 86</span>  *_M_out << __value;</div><div class="line"><a name="l00087"></a><span class="lineno"> 87</span>  return *this;</div><div class="line"><a name="l00088"></a><span class="lineno"> 88</span>  }</div><div class="line"><a name="l00089"></a><span class="lineno"> 89</span> </div><div class="line"><a name="l00090"></a><span class="lineno"> 90</span>  ostream_joiner& operator*() noexcept { return *this; }</div><div class="line"><a name="l00091"></a><span class="lineno"> 91</span>  ostream_joiner& operator++() noexcept { return *this; }</div><div class="line"><a name="l00092"></a><span class="lineno"> 92</span>  ostream_joiner& operator++(int) noexcept { return *this; }</div><div class="line"><a name="l00093"></a><span class="lineno"> 93</span> </div><div class="line"><a name="l00094"></a><span class="lineno"> 94</span>  private:</div><div class="line"><a name="l00095"></a><span class="lineno"> 95</span>  ostream_type* _M_out;</div><div class="line"><a name="l00096"></a><span class="lineno"> 96</span>  _DelimT _M_delim;</div><div class="line"><a name="l00097"></a><span class="lineno"> 97</span>  bool _M_first = true;</div><div class="line"><a name="l00098"></a><span class="lineno"> 98</span>  };</div><div class="line"><a name="l00099"></a><span class="lineno"> 99</span> </div><div class="line"><a name="l00100"></a><span class="lineno"> 100</span>  /// Object generator for ostream_joiner.</div><div class="line"><a name="l00101"></a><span class="lineno"> 101</span>  template<typename _CharT, typename _Traits, typename _DelimT></div><div class="line"><a name="l00102"></a><span class="lineno"> 102</span>  inline ostream_joiner<decay_t<_DelimT>, _CharT, _Traits></div><div class="line"><a name="l00103"></a><span class="lineno"> 103</span>  make_ostream_joiner(basic_ostream<_CharT, _Traits>& __os,</div><div class="line"><a name="l00104"></a><span class="lineno"> 104</span>  _DelimT&& __delimiter)</div><div class="line"><a name="l00105"></a><span class="lineno"> 105</span>  { return { __os, std::forward<_DelimT>(__delimiter) }; }</div><div class="line"><a name="l00106"></a><span class="lineno"> 106</span> } // namespace fundamentals_v2</div><div class="line"><a name="l00107"></a><span class="lineno"> 107</span> } // namespace experimental</div><div class="line"><a name="l00108"></a><span class="lineno"> 108</span> </div><div class="line"><a name="l00109"></a><span class="lineno"> 109</span> _GLIBCXX_END_NAMESPACE_VERSION</div><div class="line"><a name="l00110"></a><span class="lineno"> 110</span> } // namespace std</div><div class="line"><a name="l00111"></a><span class="lineno"> 111</span> </div><div class="line"><a name="l00112"></a><span class="lineno"> 112</span> #endif // __cplusplus <= 201103L</div><div class="line"><a name="l00113"></a><span class="lineno"> 113</span> </div><div class="line"><a name="l00114"></a><span class="lineno"> 114</span> #endif // _GLIBCXX_EXPERIMENTAL_ITERATOR</div></div><!-- fragment --></div><!-- contents -->
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