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 <cstddef> 17 #include <iosfwd> // for forward declaration of basic_streambuf 18 19 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 20 # pragma GCC system_header 21 #endif 22 23 _LIBCPP_BEGIN_NAMESPACE_STD 24 25 _LIBCPP_SUPPRESS_DEPRECATED_PUSH 26 template <class _CharT, class _Traits> 27 class _LIBCPP_TEMPLATE_VIS ostreambuf_iterator 28 #if _LIBCPP_STD_VER <= 14 || !defined(_LIBCPP_ABI_NO_ITERATOR_BASES) 29 : public iterator<output_iterator_tag, void, void, void, void> 30 #endif 31 { 32 _LIBCPP_SUPPRESS_DEPRECATED_POP 33 public: 34 typedef output_iterator_tag iterator_category; 35 typedef void value_type; 36 #if _LIBCPP_STD_VER >= 20 37 typedef ptrdiff_t difference_type; 38 #else 39 typedef void difference_type; 40 #endif 41 typedef void pointer; 42 typedef void reference; 43 typedef _CharT char_type; 44 typedef _Traits traits_type; 45 typedef basic_streambuf<_CharT, _Traits> streambuf_type; 46 typedef basic_ostream<_CharT, _Traits> ostream_type; 47 48 private: 49 streambuf_type* __sbuf_; 50 public: 51 _LIBCPP_HIDE_FROM_ABI ostreambuf_iterator(ostream_type& __s) _NOEXCEPT 52 : __sbuf_(__s.rdbuf()) {} 53 _LIBCPP_HIDE_FROM_ABI ostreambuf_iterator(streambuf_type* __s) _NOEXCEPT 54 : __sbuf_(__s) {} 55 _LIBCPP_HIDE_FROM_ABI ostreambuf_iterator& operator=(_CharT __c) 56 { 57 if (__sbuf_ && traits_type::eq_int_type(__sbuf_->sputc(__c), traits_type::eof())) 58 __sbuf_ = nullptr; 59 return *this; 60 } 61 _LIBCPP_HIDE_FROM_ABI ostreambuf_iterator& operator*() {return *this;} 62 _LIBCPP_HIDE_FROM_ABI ostreambuf_iterator& operator++() {return *this;} 63 _LIBCPP_HIDE_FROM_ABI ostreambuf_iterator& operator++(int) {return *this;} 64 _LIBCPP_HIDE_FROM_ABI bool failed() const _NOEXCEPT {return __sbuf_ == nullptr;} 65 66 template <class _Ch, class _Tr> 67 friend 68 _LIBCPP_HIDE_FROM_ABI 69 ostreambuf_iterator<_Ch, _Tr> 70 __pad_and_output(ostreambuf_iterator<_Ch, _Tr> __s, 71 const _Ch* __ob, const _Ch* __op, const _Ch* __oe, 72 ios_base& __iob, _Ch __fl); 73 }; 74 75 _LIBCPP_END_NAMESPACE_STD 76 77 #endif // _LIBCPP___ITERATOR_OSTREAMBUF_ITERATOR_H 78