libcxx/include/__iterator/ostreambuf_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_OSTREAMBUF_ITERATOR_H
  11 #define _LIBCPP___ITERATOR_OSTREAMBUF_ITERATOR_H
  12
  13 #include <__config>
  14 #include <__cstddef/ptrdiff_t.h>
  15 #include <__fwd/ios.h>
  16 #include <__fwd/ostream.h>
  17 #include <__fwd/streambuf.h>
  18 #include <__iterator/iterator.h>
  19 #include <__iterator/iterator_traits.h>
  20 #include <iosfwd> // for forward declaration of ostreambuf_iterator
  21
  22 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
  23 #  pragma GCC system_header
  24 #endif
  25
  26 _LIBCPP_BEGIN_NAMESPACE_STD
  27
  28 _LIBCPP_SUPPRESS_DEPRECATED_PUSH
  29 template <class _CharT, class _Traits>
  30 class _LIBCPP_TEMPLATE_VIS ostreambuf_iterator
  31 #if _LIBCPP_STD_VER <= 14 || !defined(_LIBCPP_ABI_NO_ITERATOR_BASES)
  32     : public iterator<output_iterator_tag, void, void, void, void>
  33 #endif
  34 {
  35   _LIBCPP_SUPPRESS_DEPRECATED_POP
  36
  37 public:
  38   typedef output_iterator_tag iterator_category;
  39   typedef void value_type;
  40 #if _LIBCPP_STD_VER >= 20
  41   typedef ptrdiff_t difference_type;
  42 #else
  43   typedef void difference_type;
  44 #endif
  45   typedef void pointer;
  46   typedef void reference;
  47   typedef _CharT char_type;
  48   typedef _Traits traits_type;
  49   typedef basic_streambuf<_CharT, _Traits> streambuf_type;
  50   typedef basic_ostream<_CharT, _Traits> ostream_type;
  51
  52 private:
  53   streambuf_type* __sbuf_;
  54
  55 public:
  56   _LIBCPP_HIDE_FROM_ABI ostreambuf_iterator(ostream_type& __s) _NOEXCEPT : __sbuf_(__s.rdbuf()) {}
  57   _LIBCPP_HIDE_FROM_ABI ostreambuf_iterator(streambuf_type* __s) _NOEXCEPT : __sbuf_(__s) {}
  58   _LIBCPP_HIDE_FROM_ABI ostreambuf_iterator& operator=(_CharT __c) {
  59     if (__sbuf_ && traits_type::eq_int_type(__sbuf_->sputc(__c), traits_type::eof()))
  60       __sbuf_ = nullptr;
  61     return *this;
  62   }
  63   _LIBCPP_HIDE_FROM_ABI ostreambuf_iterator& operator*() { return *this; }
  64   _LIBCPP_HIDE_FROM_ABI ostreambuf_iterator& operator++() { return *this; }
  65   _LIBCPP_HIDE_FROM_ABI ostreambuf_iterator& operator++(int) { return *this; }
  66   _LIBCPP_HIDE_FROM_ABI bool failed() const _NOEXCEPT { return __sbuf_ == nullptr; }
  67
  68 #if _LIBCPP_HAS_LOCALIZATION
  69   template <class _Ch, class _Tr>
  70   friend _LIBCPP_HIDE_FROM_ABI ostreambuf_iterator<_Ch, _Tr> __pad_and_output(
  71       ostreambuf_iterator<_Ch, _Tr> __s, const _Ch* __ob, const _Ch* __op, const _Ch* __oe, ios_base& __iob, _Ch __fl);
  72 #endif // _LIBCPP_HAS_LOCALIZATION
  73 };
  74
  75 _LIBCPP_END_NAMESPACE_STD
  76
  77 #endif // _LIBCPP___ITERATOR_OSTREAMBUF_ITERATOR_H