kicad/include/boost/archive/iterators/dataflow.hpp

106 lines
2.9 KiB
C++

#ifndef BOOST_ARCHIVE_ITERATORS_DATAFLOW_HPP
#define BOOST_ARCHIVE_ITERATORS_DATAFLOW_HPP
// MS compatible compilers support #pragma once
#if defined(_MSC_VER) && (_MSC_VER >= 1020)
# 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/config.hpp> // for BOOST_DEDUCED_TYPENAME
#include <boost/mpl/eval_if.hpp>
#include <boost/mpl/if.hpp>
#include <boost/mpl/bool.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