istreambuf_iterator< _Elem, _Traits > Class Template Reference

Inheritance diagram for istreambuf_iterator< _Elem, _Traits >:

Public Types
typedef _Elem	char_type
typedef _Traits	traits_type
typedef basic_streambuf< _Elem, _Traits >	streambuf_type
typedef basic_istream< _Elem, _Traits >	istream_type
typedef traits_type::int_type	int_type
typedef const _Elem *	pointer
Public Types inherited from iterator< input_iterator_tag, _Elem, _Traits::off_type, const _Elem *, _Elem >
typedef input_iterator_tag	iterator_category
typedef _Elem	value_type
typedef _Traits::off_type	difference_type
typedef const _Elem *	pointer
typedef _Elem	reference

Public Member Functions
constexpr	istreambuf_iterator (streambuf_type *_Sb=0) _THROW0()
	istreambuf_iterator (istream_type &_Istr) _THROW0()
_Elem	operator* () const
const _Elem *	operator-> () const
_Myt &	operator++ ()
_Myt	operator++ (int)
bool	equal (const _Myt &_Right) const

Private Types
typedef istreambuf_iterator< _Elem, _Traits >	_Myt

Private Member Functions
void	_Inc ()
_Elem	_Peek () const

Private Attributes
streambuf_type *	_Strbuf
bool	_Got
_Elem	_Val

Member Typedef Documentation

template<class _Elem, class _Traits>

typedef istreambuf_iterator<_Elem, _Traits> istreambuf_iterator< _Elem, _Traits >::_Myt

private

template<class _Elem, class _Traits>

typedef _Elem istreambuf_iterator< _Elem, _Traits >::char_type

template<class _Elem, class _Traits>

typedef traits_type::int_type istreambuf_iterator< _Elem, _Traits >::int_type

template<class _Elem, class _Traits>

typedef basic_istream<_Elem, _Traits> istreambuf_iterator< _Elem, _Traits >::istream_type

template<class _Elem, class _Traits>

typedef const _Elem* istreambuf_iterator< _Elem, _Traits >::pointer

template<class _Elem, class _Traits>

typedef basic_streambuf<_Elem, _Traits> istreambuf_iterator< _Elem, _Traits >::streambuf_type

template<class _Elem, class _Traits>

typedef _Traits istreambuf_iterator< _Elem, _Traits >::traits_type

Constructor & Destructor Documentation

template<class _Elem, class _Traits>

constexpr istreambuf_iterator< _Elem, _Traits >::istreambuf_iterator ( streambuf_type *  _Sb = 0 )

inline

        : _Strbuf(_Sb), _Got(_Sb == 0), _Val()
        {   // construct from stream buffer _Sb
        }

template<class _Elem, class _Traits>

istreambuf_iterator< _Elem, _Traits >::istreambuf_iterator ( istream_type &  _Istr )

inline

        : _Strbuf(_Istr.rdbuf()), _Got(_Istr.rdbuf() == 0)
        {   // construct from stream buffer in istream _Istr
        }

Member Function Documentation

template<class _Elem, class _Traits>

void istreambuf_iterator< _Elem, _Traits >::_Inc ( )

inlineprivate

        {   // skip to next input element
        if (_Strbuf == 0
            || traits_type::eq_int_type(traits_type::eof(),
                _Strbuf->sbumpc()))
            {
            _Strbuf = 0;
            _Got = true;
            }
        else
            {
            _Got = false;
            }
        }

template<class _Elem, class _Traits>

_Elem istreambuf_iterator< _Elem, _Traits >::_Peek ( ) const

inlineprivate

        {   // peek at next input element
        int_type _Meta;
        if (_Strbuf == 0
            || traits_type::eq_int_type(traits_type::eof(),
                _Meta = _Strbuf->sgetc()))
            _Strbuf = 0;
        else
            _Val = traits_type::to_char_type(_Meta);
        _Got = true;
        return (_Val);
        }

template<class _Elem, class _Traits>

bool istreambuf_iterator< _Elem, _Traits >::equal ( const _Myt &  _Right ) const

inline

        {   // test for equality
        if (!_Got)
            _Peek();
        if (!_Right._Got)
            _Right._Peek();
        return ((_Strbuf == 0 && _Right._Strbuf == 0)
            || (_Strbuf != 0 && _Right._Strbuf != 0));
        }

template<class _Elem, class _Traits>

_Elem istreambuf_iterator< _Elem, _Traits >::operator* ( ) const

inline

        {   // return designated value
        if (!_Got)
            _Peek();

 #if _ITERATOR_DEBUG_LEVEL == 2
        if (_Strbuf == 0)
            {
            _DEBUG_ERROR("istreambuf_iterator is not dereferencable");
            }
 #endif /* _ITERATOR_DEBUG_LEVEL == 2 */

        return (_Val);
        }

template<class _Elem, class _Traits>

_Myt& istreambuf_iterator< _Elem, _Traits >::operator++ ( )

inline

        {   // preincrement
 #if _ITERATOR_DEBUG_LEVEL == 2
        if (_Strbuf == 0)
            {
            _DEBUG_ERROR("istreambuf_iterator is not incrementable");
            }
 #endif /* _ITERATOR_DEBUG_LEVEL == 2 */

        _Inc();
        return (*this);
        }

template<class _Elem, class _Traits>

_Myt istreambuf_iterator< _Elem, _Traits >::operator++ ( int  )

inline

        {   // postincrement
        if (!_Got)
            _Peek();
        _Myt _Tmp = *this;
        ++*this;
        return (_Tmp);
        }

template<class _Elem, class _Traits>

const _Elem* istreambuf_iterator< _Elem, _Traits >::operator-> ( ) const

inline

        {   // return pointer to class object
        return (pointer_traits<pointer>::pointer_to(**this));
        }

Member Data Documentation

template<class _Elem, class _Traits>

bool istreambuf_iterator< _Elem, _Traits >::_Got

mutableprivate

template<class _Elem, class _Traits>

streambuf_type* istreambuf_iterator< _Elem, _Traits >::_Strbuf

mutableprivate

template<class _Elem, class _Traits>

_Elem istreambuf_iterator< _Elem, _Traits >::_Val

mutableprivate

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The documentation for this class was generated from the following files:

• VS2017/inc/iosfwd
• VS2017/inc/streambuf