Marshall Clow | b8d4b4c | 2016-01-28 04:15:35 +0000 | [diff] [blame] | 1 | // -*- C++ -*- |
| 2 | //===----------------------------- iterator -------------------------------===// |
| 3 | // |
| 4 | // The LLVM Compiler Infrastructure |
| 5 | // |
| 6 | // This file is distributed under the University of Illinois Open Source |
| 7 | // License. See LICENSE.TXT for details. |
| 8 | // |
| 9 | //===----------------------------------------------------------------------===// |
| 10 | |
| 11 | #ifndef _LIBCPP_EXPERIMENTAL_ITERATOR |
| 12 | #define _LIBCPP_EXPERIMENTAL_ITERATOR |
| 13 | |
| 14 | /* |
| 15 | namespace std { |
| 16 | namespace experimental { |
| 17 | inline namespace fundamentals_v2 { |
| 18 | |
| 19 | template <class DelimT, class charT = char, class traits = char_traits<charT>> |
| 20 | class ostream_joiner { |
| 21 | public: |
| 22 | typedef charT char_type; |
| 23 | typedef traits traits_type; |
| 24 | typedef basic_ostream<charT, traits> ostream_type; |
| 25 | typedef output_iterator_tag iterator_category; |
| 26 | typedef void value_type; |
| 27 | typedef void difference_type; |
| 28 | typedef void pointer; |
| 29 | typedef void reference; |
| 30 | |
| 31 | ostream_joiner(ostream_type& s, const DelimT& delimiter); |
| 32 | ostream_joiner(ostream_type& s, DelimT&& delimiter); |
| 33 | |
| 34 | template<typename T> |
| 35 | ostream_joiner& operator=(const T& value); |
| 36 | |
| 37 | ostream_joiner& operator*() noexcept; |
| 38 | ostream_joiner& operator++() noexcept; |
| 39 | ostream_joiner& operator++(int) noexcept; |
| 40 | private: |
| 41 | ostream_type* out_stream; // exposition only |
| 42 | DelimT delim; // exposition only |
| 43 | bool first_element; // exposition only |
| 44 | }; |
| 45 | |
| 46 | template <class charT, class traits, class DelimT> |
| 47 | ostream_joiner<decay_t<DelimT>, charT, traits> |
| 48 | make_ostream_joiner(basic_ostream<charT, traits>& os, DelimT&& delimiter); |
| 49 | |
| 50 | } // inline namespace fundamentals_v2 |
| 51 | } // namespace experimental |
| 52 | } // namespace std |
| 53 | |
| 54 | */ |
| 55 | |
| 56 | #include <experimental/__config> |
| 57 | |
| 58 | #if _LIBCPP_STD_VER > 11 |
| 59 | |
| 60 | #include <iterator> |
| 61 | |
| 62 | _LIBCPP_BEGIN_NAMESPACE_LFTS |
| 63 | |
| 64 | template <class _Delim, class _CharT = char, class _Traits = char_traits<_CharT>> |
| 65 | class ostream_joiner { |
| 66 | public: |
| 67 | |
| 68 | typedef _CharT char_type; |
| 69 | typedef _Traits traits_type; |
| 70 | typedef basic_ostream<char_type,traits_type> ostream_type; |
| 71 | typedef output_iterator_tag iterator_category; |
| 72 | typedef void value_type; |
| 73 | typedef void difference_type; |
| 74 | typedef void pointer; |
| 75 | typedef void reference; |
| 76 | |
| 77 | ostream_joiner(ostream_type& __os, _Delim&& __d) |
| 78 | : __out(_VSTD::addressof(__os)), __delim(_VSTD::move(__d)), __first(true) {} |
| 79 | |
| 80 | ostream_joiner(ostream_type& __os, const _Delim& __d) |
| 81 | : __out(_VSTD::addressof(__os)), __delim(__d), __first(true) {} |
| 82 | |
| 83 | |
| 84 | template<typename _Tp> |
| 85 | ostream_joiner& operator=(const _Tp& __v) |
| 86 | { |
| 87 | if (!__first) |
| 88 | *__out << __delim; |
| 89 | __first = false; |
| 90 | *__out << __v; |
| 91 | return *this; |
| 92 | } |
| 93 | |
| 94 | ostream_joiner& operator*() _NOEXCEPT { return *this; } |
| 95 | ostream_joiner& operator++() _NOEXCEPT { return *this; } |
| 96 | ostream_joiner& operator++(int) _NOEXCEPT { return *this; } |
| 97 | |
| 98 | private: |
| 99 | ostream_type* __out; |
| 100 | _Delim __delim; |
| 101 | bool __first; |
| 102 | }; |
| 103 | |
| 104 | |
| 105 | template <class _CharT, class _Traits, class _Delim> |
| 106 | ostream_joiner<typename decay<_Delim>::type, _CharT, _Traits> |
| 107 | make_ostream_joiner(basic_ostream<_CharT, _Traits>& __os, _Delim && __d) |
| 108 | { return ostream_joiner<typename decay<_Delim>::type, _CharT, _Traits>(__os, _VSTD::forward<_Delim>(__d)); } |
| 109 | |
| 110 | _LIBCPP_END_NAMESPACE_LFTS |
| 111 | |
| 112 | #endif /* _LIBCPP_STD_VER > 11 */ |
| 113 | |
| 114 | #endif // _LIBCPP_EXPERIMENTAL_ITERATOR |