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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-exception7//8//===----------------------------------------------------------------------===//9 10#ifndef _LIBCPP___CXX03___ITERATOR_ISTREAM_ITERATOR_H11#define _LIBCPP___CXX03___ITERATOR_ISTREAM_ITERATOR_H12 13#include <__cxx03/__config>14#include <__cxx03/__fwd/istream.h>15#include <__cxx03/__fwd/string.h>16#include <__cxx03/__iterator/iterator.h>17#include <__cxx03/__iterator/iterator_traits.h>18#include <__cxx03/__memory/addressof.h>19#include <__cxx03/cstddef>20 21#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)22# pragma GCC system_header23#endif24 25_LIBCPP_BEGIN_NAMESPACE_STD26 27_LIBCPP_SUPPRESS_DEPRECATED_PUSH28template <class _Tp, class _CharT = char, class _Traits = char_traits<_CharT>, class _Distance = ptrdiff_t>29class _LIBCPP_TEMPLATE_VIS istream_iterator30 : public iterator<input_iterator_tag, _Tp, _Distance, const _Tp*, const _Tp&> {31 _LIBCPP_SUPPRESS_DEPRECATED_POP32 33public:34 typedef input_iterator_tag iterator_category;35 typedef _Tp value_type;36 typedef _Distance difference_type;37 typedef const _Tp* pointer;38 typedef const _Tp& reference;39 typedef _CharT char_type;40 typedef _Traits traits_type;41 typedef basic_istream<_CharT, _Traits> istream_type;42 43private:44 istream_type* __in_stream_;45 _Tp __value_;46 47public:48 _LIBCPP_HIDE_FROM_ABI istream_iterator() : __in_stream_(nullptr), __value_() {}49 _LIBCPP_HIDE_FROM_ABI istream_iterator(istream_type& __s) : __in_stream_(std::addressof(__s)) {50 if (!(*__in_stream_ >> __value_))51 __in_stream_ = nullptr;52 }53 54 _LIBCPP_HIDE_FROM_ABI const _Tp& operator*() const { return __value_; }55 _LIBCPP_HIDE_FROM_ABI const _Tp* operator->() const { return std::addressof((operator*())); }56 _LIBCPP_HIDE_FROM_ABI istream_iterator& operator++() {57 if (!(*__in_stream_ >> __value_))58 __in_stream_ = nullptr;59 return *this;60 }61 _LIBCPP_HIDE_FROM_ABI istream_iterator operator++(int) {62 istream_iterator __t(*this);63 ++(*this);64 return __t;65 }66 67 template <class _Up, class _CharU, class _TraitsU, class _DistanceU>68 friend _LIBCPP_HIDE_FROM_ABI bool operator==(const istream_iterator<_Up, _CharU, _TraitsU, _DistanceU>& __x,69 const istream_iterator<_Up, _CharU, _TraitsU, _DistanceU>& __y);70};71 72template <class _Tp, class _CharT, class _Traits, class _Distance>73inline _LIBCPP_HIDE_FROM_ABI bool operator==(const istream_iterator<_Tp, _CharT, _Traits, _Distance>& __x,74 const istream_iterator<_Tp, _CharT, _Traits, _Distance>& __y) {75 return __x.__in_stream_ == __y.__in_stream_;76}77 78template <class _Tp, class _CharT, class _Traits, class _Distance>79inline _LIBCPP_HIDE_FROM_ABI bool operator!=(const istream_iterator<_Tp, _CharT, _Traits, _Distance>& __x,80 const istream_iterator<_Tp, _CharT, _Traits, _Distance>& __y) {81 return !(__x == __y);82}83 84_LIBCPP_END_NAMESPACE_STD85 86#endif // _LIBCPP___CXX03___ITERATOR_ISTREAM_ITERATOR_H87