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 <__iterator/iterator.h> 15 #include <__iterator/iterator_traits.h> 16 #include <iosfwd> // for forward declaration of basic_streambuf 17 18 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 19 #pragma GCC system_header 20 #endif 21 22 _LIBCPP_PUSH_MACROS 23 #include <__undef_macros> 24 25 _LIBCPP_BEGIN_NAMESPACE_STD 26 27 _LIBCPP_SUPPRESS_DEPRECATED_PUSH 28 template <class _CharT, class _Traits> 29 class _LIBCPP_TEMPLATE_VIS ostreambuf_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 > 17 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_streambuf<_CharT, _Traits> streambuf_type; 48 typedef basic_ostream<_CharT, _Traits> ostream_type; 49 50 private: 51 streambuf_type* __sbuf_; 52 public: 53 _LIBCPP_INLINE_VISIBILITY ostreambuf_iterator(ostream_type& __s) _NOEXCEPT 54 : __sbuf_(__s.rdbuf()) {} 55 _LIBCPP_INLINE_VISIBILITY ostreambuf_iterator(streambuf_type* __s) _NOEXCEPT 56 : __sbuf_(__s) {} 57 _LIBCPP_INLINE_VISIBILITY ostreambuf_iterator& operator=(_CharT __c) 58 { 59 if (__sbuf_ && traits_type::eq_int_type(__sbuf_->sputc(__c), traits_type::eof())) 60 __sbuf_ = nullptr; 61 return *this; 62 } 63 _LIBCPP_INLINE_VISIBILITY ostreambuf_iterator& operator*() {return *this;} 64 _LIBCPP_INLINE_VISIBILITY ostreambuf_iterator& operator++() {return *this;} 65 _LIBCPP_INLINE_VISIBILITY ostreambuf_iterator& operator++(int) {return *this;} 66 _LIBCPP_INLINE_VISIBILITY bool failed() const _NOEXCEPT {return __sbuf_ == nullptr;} 67 68 template <class _Ch, class _Tr> 69 friend 70 _LIBCPP_HIDDEN 71 ostreambuf_iterator<_Ch, _Tr> 72 __pad_and_output(ostreambuf_iterator<_Ch, _Tr> __s, 73 const _Ch* __ob, const _Ch* __op, const _Ch* __oe, 74 ios_base& __iob, _Ch __fl); 75 }; 76 77 _LIBCPP_END_NAMESPACE_STD 78 79 _LIBCPP_POP_MACROS 80 81 #endif // _LIBCPP___ITERATOR_OSTREAMBUF_ITERATOR_H 82