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