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// Stream iterators
// Copyright (C) 2001 Free Software Foundation, Inc.
//
// This file is part of the GNU ISO C++ Library. This library is free
// software; you can redistribute it and/or modify it under the
// terms of the GNU General Public License as published by the
// Free Software Foundation; either version 2, or (at your option)
// any later version.
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License along
// with this library; see the file COPYING. If not, write to the Free
// Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
// USA.
// As a special exception, you may use this file as part of a free software
// library without restriction. Specifically, if other files instantiate
// templates or use macros or inline functions from this file, or you compile
// this file and link it with other files to produce an executable, this
// file does not by itself cause the resulting executable to be covered by
// the GNU General Public License. This exception does not however
// invalidate any other reasons why the executable file might be covered by
// the GNU General Public License.
/** @file stream_iterator.h
* This is an internal header file, included by other library headers.
* You should not attempt to use it directly.
*/
#ifndef _CPP_BITS_STREAM_ITERATOR_H
#define _CPP_BITS_STREAM_ITERATOR_H 1
#pragma GCC system_header
namespace std
{
template<typename _Tp, typename _CharT = char,
typename _Traits = char_traits<_CharT>, typename _Dist = ptrdiff_t>
class istream_iterator
: public iterator<input_iterator_tag, _Tp, _Dist, const _Tp*, const _Tp&>
{
public:
typedef _CharT char_type;
typedef _Traits traits_type;
typedef basic_istream<_CharT, _Traits> istream_type;
private:
istream_type* _M_stream;
_Tp _M_value;
bool _M_ok;
public:
istream_iterator() : _M_stream(0), _M_ok(false) {}
istream_iterator(istream_type& __s) : _M_stream(&__s) { _M_read(); }
istream_iterator(const istream_iterator& __obj)
: _M_stream(__obj._M_stream), _M_value(__obj._M_value),
_M_ok(__obj._M_ok)
{ }
const _Tp&
operator*() const { return _M_value; }
const _Tp*
operator->() const { return &(operator*()); }
istream_iterator&
operator++()
{ _M_read(); return *this; }
istream_iterator
operator++(int)
{
istream_iterator __tmp = *this;
_M_read();
return __tmp;
}
bool
_M_equal(const istream_iterator& __x) const
{ return (_M_ok == __x._M_ok) && (!_M_ok || _M_stream == __x._M_stream);}
private:
void
_M_read()
{
_M_ok = (_M_stream && *_M_stream) ? true : false;
if (_M_ok)
{
*_M_stream >> _M_value;
_M_ok = *_M_stream ? true : false;
}
}
};
template<typename _Tp, typename _CharT, typename _Traits, typename _Dist>
inline bool
operator==(const istream_iterator<_Tp, _CharT, _Traits, _Dist>& __x,
const istream_iterator<_Tp, _CharT, _Traits, _Dist>& __y)
{ return __x._M_equal(__y); }
template <class _Tp, class _CharT, class _Traits, class _Dist>
inline bool
operator!=(const istream_iterator<_Tp, _CharT, _Traits, _Dist>& __x,
const istream_iterator<_Tp, _CharT, _Traits, _Dist>& __y)
{ return !__x._M_equal(__y); }
template<typename _Tp, typename _CharT = char,
typename _Traits = char_traits<_CharT> >
class ostream_iterator
: public iterator<output_iterator_tag, void, void, void, void>
{
public:
typedef _CharT char_type;
typedef _Traits traits_type;
typedef basic_ostream<_CharT, _Traits> ostream_type;
private:
ostream_type* _M_stream;
const _CharT* _M_string;
public:
ostream_iterator(ostream_type& __s) : _M_stream(&__s), _M_string(0) {}
ostream_iterator(ostream_type& __s, const _CharT* __c)
: _M_stream(&__s), _M_string(__c) { }
ostream_iterator(const ostream_iterator& __obj)
: _M_stream(__obj._M_stream), _M_string(__obj._M_string) { }
ostream_iterator&
operator=(const _Tp& __value)
{
*_M_stream << __value;
if (_M_string) *_M_stream << _M_string;
return *this;
}
ostream_iterator&
operator*() { return *this; }
ostream_iterator&
operator++() { return *this; }
ostream_iterator&
operator++(int) { return *this; }
};
} // namespace std
#endif
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