boost/archive/iterators/ostream_iterator.hpp
#ifndef BOOST_ARCHIVE_ITERATORS_OSTREAM_ITERATOR_HPP
#define BOOST_ARCHIVE_ITERATORS_OSTREAM_ITERATOR_HPP
// MS compatible compilers support #pragma once
#if defined(_MSC_VER)
# pragma once
#endif
/////////1/////////2/////////3/////////4/////////5/////////6/////////7/////////8
// ostream_iterator.hpp
// (C) Copyright 2002 Robert Ramey - http://www.rrsd.com .
// Use, modification and distribution is subject to the Boost Software
// License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt)
// See http://www.boost.org for updates, documentation, and revision history.
// note: this is a custom version of the standard ostream_iterator.
// This is necessary as the standard version doesn't work as expected
// for wchar_t based streams on systems for which wchar_t not a true
// type but rather a synonym for some integer type.
#include <ostream>
#include <boost/iterator/iterator_facade.hpp>
namespace boost {
namespace archive {
namespace iterators {
// given a type, make an input iterator based on a pointer to that type
template<class Elem>
class ostream_iterator :
public boost::iterator_facade<
ostream_iterator<Elem>,
Elem,
std::output_iterator_tag,
ostream_iterator<Elem> &
>
{
friend class boost::iterator_core_access;
typedef ostream_iterator this_t ;
typedef Elem char_type;
typedef std::basic_ostream<char_type> ostream_type;
//emulate the behavior of std::ostream
ostream_iterator & dereference() const {
return const_cast<ostream_iterator &>(*this);
}
bool equal(const this_t & rhs) const {
return m_ostream == rhs.m_ostream;
}
void increment(){}
protected:
ostream_type *m_ostream;
void put_val(char_type e){
if(NULL != m_ostream){
m_ostream->put(e);
if(! m_ostream->good())
m_ostream = NULL;
}
}
public:
this_t & operator=(char_type c){
put_val(c);
return *this;
}
ostream_iterator(ostream_type & os) :
m_ostream (& os)
{}
ostream_iterator() :
m_ostream (NULL)
{}
ostream_iterator(const ostream_iterator & rhs) :
m_ostream (rhs.m_ostream)
{}
};
} // namespace iterators
} // namespace archive
} // namespace boost
#endif // BOOST_ARCHIVE_ITERATORS_OSTREAM_ITERATOR_HPP