libcxx/include/__iterator/ostream_iterator.h

   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___ITERATOR_OSTREAM_ITERATOR_H
  11 #define _LIBCPP___ITERATOR_OSTREAM_ITERATOR_H
  12
  13 #include <__config>
  14 #include <__fwd/ostream.h>
  15 #include <__fwd/string.h>
  16 #include <__iterator/iterator.h>
  17 #include <__iterator/iterator_traits.h>
  18 #include <__memory/addressof.h>
  19 #include <cstddef>
  20
  21 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
  22 #  pragma GCC system_header
  23 #endif
  24
  25 _LIBCPP_BEGIN_NAMESPACE_STD
  26
  27 _LIBCPP_SUPPRESS_DEPRECATED_PUSH
  28 template <class _Tp, class _CharT = char, class _Traits = char_traits<_CharT> >
  29 class _LIBCPP_TEMPLATE_VIS ostream_iterator
  30 #if _LIBCPP_STD_VER <= 14 || !defined(_LIBCPP_ABI_NO_ITERATOR_BASES)
  31     : public iterator<output_iterator_tag, void, void, void, void>
  32 #endif
  33 {
  34 _LIBCPP_SUPPRESS_DEPRECATED_POP
  35 public:
  36     typedef output_iterator_tag             iterator_category;
  37     typedef void                            value_type;
  38 #if _LIBCPP_STD_VER >= 20
  39     typedef ptrdiff_t                       difference_type;
  40 #else
  41     typedef void                            difference_type;
  42 #endif
  43     typedef void                            pointer;
  44     typedef void                            reference;
  45     typedef _CharT                          char_type;
  46     typedef _Traits                         traits_type;
  47     typedef basic_ostream<_CharT, _Traits>  ostream_type;
  48
  49 private:
  50     ostream_type* __out_stream_;
  51     const char_type* __delim_;
  52 public:
  53     _LIBCPP_INLINE_VISIBILITY ostream_iterator(ostream_type& __s) _NOEXCEPT
  54         : __out_stream_(_VSTD::addressof(__s)), __delim_(nullptr) {}
  55     _LIBCPP_INLINE_VISIBILITY ostream_iterator(ostream_type& __s, const _CharT* __delimiter) _NOEXCEPT
  56         : __out_stream_(_VSTD::addressof(__s)), __delim_(__delimiter) {}
  57     _LIBCPP_INLINE_VISIBILITY ostream_iterator& operator=(const _Tp& __value)
  58         {
  59             *__out_stream_ << __value;
  60             if (__delim_)
  61                 *__out_stream_ << __delim_;
  62             return *this;
  63         }
  64
  65     _LIBCPP_INLINE_VISIBILITY ostream_iterator& operator*()     {return *this;}
  66     _LIBCPP_INLINE_VISIBILITY ostream_iterator& operator++()    {return *this;}
  67     _LIBCPP_INLINE_VISIBILITY ostream_iterator& operator++(int) {return *this;}
  68 };
  69
  70 _LIBCPP_END_NAMESPACE_STD
  71
  72 #endif // _LIBCPP___ITERATOR_OSTREAM_ITERATOR_H