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-exception 7// 8//===----------------------------------------------------------------------===// 9 10#ifndef _LIBCPP_EXPERIMENTAL_ITERATOR 11#define _LIBCPP_EXPERIMENTAL_ITERATOR 12 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 only 41 DelimT delim; // exposition only 42 bool first_element; // exposition only 43 }; 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_v2 50 } // namespace experimental 51} // namespace std 52 53*/ 54 55#if __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS) 56# include <__cxx03/experimental/iterator> 57#else 58# 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_header 69# endif 70 71_LIBCPP_PUSH_MACROS 72# include <__undef_macros> 73 74# if _LIBCPP_STD_VER >= 14 75 76_LIBCPP_BEGIN_NAMESPACE_LFTS 77 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_LFTS 122 123# endif // _LIBCPP_STD_VER >= 14 124 125_LIBCPP_POP_MACROS 126 127# if !defined(_LIBCPP_REMOVE_TRANSITIVE_INCLUDES) && _LIBCPP_STD_VER <= 20 128# include <cstddef> 129# include <iosfwd> 130# include <type_traits> 131# endif 132#endif // __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS) 133 134#endif // _LIBCPP_EXPERIMENTAL_ITERATOR 135