117 lines
3.9 KiB
C++
117 lines
3.9 KiB
C++
// -*- C++ -*-
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//===----------------------------- iterator -------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#ifndef _LIBCPP_EXPERIMENTAL_ITERATOR
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#define _LIBCPP_EXPERIMENTAL_ITERATOR
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/*
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namespace std {
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namespace experimental {
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inline namespace fundamentals_v2 {
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template <class DelimT, class charT = char, class traits = char_traits<charT>>
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class ostream_joiner {
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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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ostream_joiner(ostream_type& s, const DelimT& delimiter);
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ostream_joiner(ostream_type& s, DelimT&& delimiter);
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template<typename T>
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ostream_joiner& operator=(const T& value);
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ostream_joiner& operator*() noexcept;
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ostream_joiner& operator++() noexcept;
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ostream_joiner& operator++(int) noexcept;
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private:
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ostream_type* out_stream; // exposition only
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DelimT delim; // exposition only
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bool first_element; // exposition only
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};
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template <class charT, class traits, class DelimT>
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ostream_joiner<decay_t<DelimT>, charT, traits>
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make_ostream_joiner(basic_ostream<charT, traits>& os, DelimT&& delimiter);
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} // inline namespace fundamentals_v2
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} // namespace experimental
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} // namespace std
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*/
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#include <experimental/__config>
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#if _LIBCPP_STD_VER > 11
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#include <__memory/addressof.h>
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#include <__utility/move.h>
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#include <__utility/forward.h>
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#include <iterator>
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_LIBCPP_BEGIN_NAMESPACE_LFTS
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template <class _Delim, class _CharT = char, class _Traits = char_traits<_CharT>>
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class ostream_joiner {
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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<char_type,traits_type> 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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ostream_joiner(ostream_type& __os, _Delim&& __d)
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: __output_iter(_VSTD::addressof(__os)), __delim(_VSTD::move(__d)), __first(true) {}
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ostream_joiner(ostream_type& __os, const _Delim& __d)
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: __output_iter(_VSTD::addressof(__os)), __delim(__d), __first(true) {}
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template<typename _Tp>
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ostream_joiner& operator=(const _Tp& __v)
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{
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if (!__first)
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*__output_iter << __delim;
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__first = false;
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*__output_iter << __v;
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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* __output_iter;
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_Delim __delim;
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bool __first;
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};
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template <class _CharT, class _Traits, class _Delim>
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ostream_joiner<typename decay<_Delim>::type, _CharT, _Traits>
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make_ostream_joiner(basic_ostream<_CharT, _Traits>& __os, _Delim && __d)
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{ return ostream_joiner<typename decay<_Delim>::type, _CharT, _Traits>(__os, _VSTD::forward<_Delim>(__d)); }
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_LIBCPP_END_NAMESPACE_LFTS
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#endif /* _LIBCPP_STD_VER > 11 */
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#endif // _LIBCPP_EXPERIMENTAL_ITERATOR
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