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#include <__config> 56#include <__memory/addressof.h> 57#include <__ostream/basic_ostream.h> 58#include <__string/char_traits.h> 59#include <__type_traits/decay.h> 60#include <__utility/forward.h> 61#include <__utility/move.h> 62#include <iterator> 63 64#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 65# pragma GCC system_header 66#endif 67 68_LIBCPP_PUSH_MACROS 69#include <__undef_macros> 70 71#if _LIBCPP_STD_VER >= 14 72 73_LIBCPP_BEGIN_NAMESPACE_LFTS 74 75template <class _Delim, class _CharT = char, class _Traits = char_traits<_CharT>> 76class ostream_joiner { 77public: 78 typedef _CharT char_type; 79 typedef _Traits traits_type; 80 typedef basic_ostream<char_type, traits_type> ostream_type; 81 typedef output_iterator_tag iterator_category; 82 typedef void value_type; 83 typedef void difference_type; 84 typedef void pointer; 85 typedef void reference; 86 87 _LIBCPP_HIDE_FROM_ABI ostream_joiner(ostream_type& __os, _Delim&& __d) 88 : __output_iter_(std::addressof(__os)), __delim_(std::move(__d)), __first_(true) {} 89 90 _LIBCPP_HIDE_FROM_ABI ostream_joiner(ostream_type& __os, const _Delim& __d) 91 : __output_iter_(std::addressof(__os)), __delim_(__d), __first_(true) {} 92 93 template <typename _Tp> 94 _LIBCPP_HIDE_FROM_ABI ostream_joiner& operator=(const _Tp& __v) { 95 if (!__first_) 96 *__output_iter_ << __delim_; 97 __first_ = false; 98 *__output_iter_ << __v; 99 return *this; 100 } 101 102 _LIBCPP_HIDE_FROM_ABI ostream_joiner& operator*() _NOEXCEPT { return *this; } 103 _LIBCPP_HIDE_FROM_ABI ostream_joiner& operator++() _NOEXCEPT { return *this; } 104 _LIBCPP_HIDE_FROM_ABI ostream_joiner& operator++(int) _NOEXCEPT { return *this; } 105 106private: 107 ostream_type* __output_iter_; 108 _Delim __delim_; 109 bool __first_; 110}; 111 112template <class _CharT, class _Traits, class _Delim> 113_LIBCPP_HIDE_FROM_ABI ostream_joiner<__decay_t<_Delim>, _CharT, _Traits> 114make_ostream_joiner(basic_ostream<_CharT, _Traits>& __os, _Delim&& __d) { 115 return ostream_joiner<__decay_t<_Delim>, _CharT, _Traits>(__os, std::forward<_Delim>(__d)); 116} 117 118_LIBCPP_END_NAMESPACE_LFTS 119 120#endif // _LIBCPP_STD_VER >= 14 121 122_LIBCPP_POP_MACROS 123 124#if !defined(_LIBCPP_REMOVE_TRANSITIVE_INCLUDES) && _LIBCPP_STD_VER <= 20 125# include <cstddef> 126# include <iosfwd> 127# include <type_traits> 128#endif 129 130#endif // _LIBCPP_EXPERIMENTAL_ITERATOR 131