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