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 <__cstddef/ptrdiff_t.h>
  15 #include <__fwd/ostream.h>
  16 #include <__fwd/string.h>
  17 #include <__iterator/iterator.h>
  18 #include <__iterator/iterator_traits.h>
  19 #include <__memory/addressof.h>
  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
  36 public:
  37   typedef output_iterator_tag iterator_category;
  38   typedef void value_type;
  39 #if _LIBCPP_STD_VER >= 20
  40   typedef ptrdiff_t difference_type;
  41 #else
  42   typedef void difference_type;
  43 #endif
  44   typedef void pointer;
  45   typedef void reference;
  46   typedef _CharT char_type;
  47   typedef _Traits traits_type;
  48   typedef basic_ostream<_CharT, _Traits> ostream_type;
  49
  50 private:
  51   ostream_type* __out_stream_;
  52   const char_type* __delim_;
  53
  54 public:
  55   _LIBCPP_HIDE_FROM_ABI ostream_iterator(ostream_type& __s) _NOEXCEPT
  56       : __out_stream_(std::addressof(__s)),
  57         __delim_(nullptr) {}
  58   _LIBCPP_HIDE_FROM_ABI ostream_iterator(ostream_type& __s, const _CharT* __delimiter) _NOEXCEPT
  59       : __out_stream_(std::addressof(__s)),
  60         __delim_(__delimiter) {}
  61   _LIBCPP_HIDE_FROM_ABI ostream_iterator& operator=(const _Tp& __value) {
  62     *__out_stream_ << __value;
  63     if (__delim_)
  64       *__out_stream_ << __delim_;
  65     return *this;
  66   }
  67
  68   _LIBCPP_HIDE_FROM_ABI ostream_iterator& operator*() { return *this; }
  69   _LIBCPP_HIDE_FROM_ABI ostream_iterator& operator++() { return *this; }
  70   _LIBCPP_HIDE_FROM_ABI ostream_iterator& operator++(int) { return *this; }
  71 };
  72
  73 _LIBCPP_END_NAMESPACE_STD
  74
  75 #endif // _LIBCPP___ITERATOR_OSTREAM_ITERATOR_H