// <experimental/iterator> -*- C++ -*- // Copyright (C) 2015-2021 Free Software Foundation, Inc. // // This file is part of the GNU ISO C++ Library. This library is free // software; you can redistribute it and/or modify it under the // terms of the GNU General Public License as published by the // Free Software Foundation; either version 3, or (at your option) // any later version. // This library is distributed in the hope that it will be useful, // but WITHOUT ANY WARRANTY; without even the implied warranty of // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the // GNU General Public License for more details. // Under Section 7 of GPL version 3, you are granted additional // permissions described in the GCC Runtime Library Exception, version // 3.1, as published by the Free Software Foundation. // You should have received a copy of the GNU General Public License and // a copy of the GCC Runtime Library Exception along with this program; // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see // <http://www.gnu.org/licenses/>. /** @file experimental/iterator * This is a TS C++ Library header. * @ingroup libfund-ts */ // // N4336 Working Draft, C++ Extensions for Library Fundamentals, Version 2 // #ifndef _GLIBCXX_EXPERIMENTAL_ITERATOR #define _GLIBCXX_EXPERIMENTAL_ITERATOR 1 #pragma GCC system_header #if __cplusplus >= 201402L #include <iterator> #include <iosfwd> #include <experimental/type_traits> namespace std _GLIBCXX_VISIBILITY(default) { _GLIBCXX_BEGIN_NAMESPACE_VERSION namespace experimental { inline namespace fundamentals_v2 { #define __cpp_lib_experimental_ostream_joiner 201411 /// Output iterator that inserts a delimiter between elements. template<typename _DelimT, typename _CharT = char, typename _Traits = char_traits<_CharT>> class ostream_joiner { public: typedef _CharT char_type; typedef _Traits traits_type; typedef basic_ostream<_CharT, _Traits> ostream_type; typedef output_iterator_tag iterator_category; typedef void value_type; typedef void difference_type; typedef void pointer; typedef void reference; ostream_joiner(ostream_type& __os, const _DelimT& __delimiter) noexcept(is_nothrow_copy_constructible_v<_DelimT>) : _M_out(std::__addressof(__os)), _M_delim(__delimiter) { } ostream_joiner(ostream_type& __os, _DelimT&& __delimiter) noexcept(is_nothrow_move_constructible_v<_DelimT>) : _M_out(std::__addressof(__os)), _M_delim(std::move(__delimiter)) { } template<typename _Tp> ostream_joiner& operator=(const _Tp& __value) { if (!_M_first) *_M_out << _M_delim; _M_first = false; *_M_out << __value; return *this; } ostream_joiner& operator*() noexcept { return *this; } ostream_joiner& operator++() noexcept { return *this; } ostream_joiner& operator++(int) noexcept { return *this; } private: ostream_type* _M_out; _DelimT _M_delim; bool _M_first = true; }; /// Object generator for ostream_joiner. template<typename _CharT, typename _Traits, typename _DelimT> inline ostream_joiner<decay_t<_DelimT>, _CharT, _Traits> make_ostream_joiner(basic_ostream<_CharT, _Traits>& __os, _DelimT&& __delimiter) { return { __os, std::forward<_DelimT>(__delimiter) }; } } // namespace fundamentals_v2 } // namespace experimental _GLIBCXX_END_NAMESPACE_VERSION } // namespace std #endif // __cplusplus <= 201103L #endif // _GLIBCXX_EXPERIMENTAL_ITERATOR SIMPAN PERUBAHAN