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1// -*- C++ -*-2//===----------------------------------------------------------------------===//3//4// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.5// See https://llvm.org/LICENSE.txt for license information.6// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception7//8//===----------------------------------------------------------------------===//9 10#ifndef _LIBCPP_EXPERIMENTAL_ITERATOR11#define _LIBCPP_EXPERIMENTAL_ITERATOR12 13/*14namespace std {15 namespace experimental {16 inline namespace fundamentals_v2 {17 18 template <class DelimT, class charT = char, class traits = char_traits<charT>>19 class ostream_joiner {20 public:21 typedef charT char_type;22 typedef traits traits_type;23 typedef basic_ostream<charT, traits> ostream_type;24 typedef output_iterator_tag iterator_category;25 typedef void value_type;26 typedef void difference_type;27 typedef void pointer;28 typedef void reference;29 30 ostream_joiner(ostream_type& s, const DelimT& delimiter);31 ostream_joiner(ostream_type& s, DelimT&& delimiter);32 33 template<typename T>34 ostream_joiner& operator=(const T& value);35 36 ostream_joiner& operator*() noexcept;37 ostream_joiner& operator++() noexcept;38 ostream_joiner& operator++(int) noexcept;39 private:40 ostream_type* out_stream; // exposition only41 DelimT delim; // exposition only42 bool first_element; // exposition only43 };44 45 template <class charT, class traits, class DelimT>46 ostream_joiner<decay_t<DelimT>, charT, traits>47 make_ostream_joiner(basic_ostream<charT, traits>& os, DelimT&& delimiter);48 49 } // inline namespace fundamentals_v250 } // namespace experimental51} // namespace std52 53*/54 55#if __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)56# include <__cxx03/__config>57#else58# include <__config>59# include <__memory/addressof.h>60# include <__ostream/basic_ostream.h>61# include <__string/char_traits.h>62# include <__type_traits/decay.h>63# include <__utility/forward.h>64# include <__utility/move.h>65# include <iterator>66 67# if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)68# pragma GCC system_header69# endif70 71_LIBCPP_PUSH_MACROS72# include <__undef_macros>73 74# if _LIBCPP_STD_VER >= 1475 76_LIBCPP_BEGIN_NAMESPACE_LFTS77 78template <class _Delim, class _CharT = char, class _Traits = char_traits<_CharT>>79class ostream_joiner {80public:81 typedef _CharT char_type;82 typedef _Traits traits_type;83 typedef basic_ostream<char_type, traits_type> ostream_type;84 typedef output_iterator_tag iterator_category;85 typedef void value_type;86 typedef void difference_type;87 typedef void pointer;88 typedef void reference;89 90 _LIBCPP_HIDE_FROM_ABI ostream_joiner(ostream_type& __os, _Delim&& __d)91 : __output_iter_(std::addressof(__os)), __delim_(std::move(__d)), __first_(true) {}92 93 _LIBCPP_HIDE_FROM_ABI ostream_joiner(ostream_type& __os, const _Delim& __d)94 : __output_iter_(std::addressof(__os)), __delim_(__d), __first_(true) {}95 96 template <typename _Tp>97 _LIBCPP_HIDE_FROM_ABI ostream_joiner& operator=(const _Tp& __v) {98 if (!__first_)99 *__output_iter_ << __delim_;100 __first_ = false;101 *__output_iter_ << __v;102 return *this;103 }104 105 _LIBCPP_HIDE_FROM_ABI ostream_joiner& operator*() _NOEXCEPT { return *this; }106 _LIBCPP_HIDE_FROM_ABI ostream_joiner& operator++() _NOEXCEPT { return *this; }107 _LIBCPP_HIDE_FROM_ABI ostream_joiner& operator++(int) _NOEXCEPT { return *this; }108 109private:110 ostream_type* __output_iter_;111 _Delim __delim_;112 bool __first_;113};114 115template <class _CharT, class _Traits, class _Delim>116_LIBCPP_HIDE_FROM_ABI ostream_joiner<__decay_t<_Delim>, _CharT, _Traits>117make_ostream_joiner(basic_ostream<_CharT, _Traits>& __os, _Delim&& __d) {118 return ostream_joiner<__decay_t<_Delim>, _CharT, _Traits>(__os, std::forward<_Delim>(__d));119}120 121_LIBCPP_END_NAMESPACE_LFTS122 123# endif // _LIBCPP_STD_VER >= 14124 125_LIBCPP_POP_MACROS126 127# if !defined(_LIBCPP_REMOVE_TRANSITIVE_INCLUDES) && _LIBCPP_STD_VER <= 20128# include <cstddef>129# include <iosfwd>130# include <optional>131# include <type_traits>132# endif133 134# if !defined(_LIBCPP_REMOVE_TRANSITIVE_INCLUDES) && _LIBCPP_STD_VER <= 23135# include <locale>136# endif137 138#endif // __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)139 140#endif // _LIBCPP_EXPERIMENTAL_ITERATOR141