#ifndef BOOST_ARCHIVE_ITERATORS_DATAFLOW_HPP
|
#define BOOST_ARCHIVE_ITERATORS_DATAFLOW_HPP
|
|
// MS compatible compilers support #pragma once
|
#if defined(_MSC_VER)
|
# pragma once
|
#endif
|
|
/////////1/////////2/////////3/////////4/////////5/////////6/////////7/////////8
|
// dataflow.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.
|
|
#include <boost/assert.hpp>
|
|
#include <boost/mpl/eval_if.hpp>
|
#include <boost/mpl/if.hpp>
|
#include <boost/mpl/apply.hpp>
|
#include <boost/mpl/plus.hpp>
|
#include <boost/mpl/int.hpp>
|
|
#include <boost/type_traits/is_convertible.hpp>
|
#include <boost/type_traits/is_base_and_derived.hpp>
|
#include <boost/type_traits/is_pointer.hpp>
|
#include <boost/iterator/iterator_adaptor.hpp>
|
#include <boost/iterator/iterator_traits.hpp>
|
#include <boost/static_assert.hpp>
|
|
namespace boost {
|
namespace archive {
|
namespace iterators {
|
|
// poor man's tri-state
|
struct tri_state {
|
enum state_enum {
|
is_false = false,
|
is_true = true,
|
is_indeterminant
|
} m_state;
|
// convert to bool
|
operator bool (){
|
BOOST_ASSERT(is_indeterminant != m_state);
|
return is_true == m_state ? true : false;
|
}
|
// assign from bool
|
tri_state & operator=(bool rhs) {
|
m_state = rhs ? is_true : is_false;
|
return *this;
|
}
|
tri_state(bool rhs) :
|
m_state(rhs ? is_true : is_false)
|
{}
|
tri_state(state_enum state) :
|
m_state(state)
|
{}
|
bool operator==(const tri_state & rhs) const {
|
return m_state == rhs.m_state;
|
}
|
bool operator!=(const tri_state & rhs) const {
|
return m_state != rhs.m_state;
|
}
|
};
|
|
/////////1/////////2/////////3/////////4/////////5/////////6/////////7/////////8
|
// implement functions common to dataflow iterators
|
template<class Derived>
|
class dataflow {
|
bool m_eoi;
|
protected:
|
// test for iterator equality
|
tri_state equal(const Derived & rhs) const {
|
if(m_eoi && rhs.m_eoi)
|
return true;
|
if(m_eoi || rhs.m_eoi)
|
return false;
|
return tri_state(tri_state::is_indeterminant);
|
}
|
void eoi(bool tf){
|
m_eoi = tf;
|
}
|
bool eoi() const {
|
return m_eoi;
|
}
|
public:
|
dataflow(bool tf) :
|
m_eoi(tf)
|
{}
|
dataflow() : // used for iterator end
|
m_eoi(true)
|
{}
|
};
|
|
} // namespace iterators
|
} // namespace archive
|
} // namespace boost
|
|
#endif // BOOST_ARCHIVE_ITERATORS_DATAFLOW_HPP
|
