mirror of
https://github.com/yuzu-emu/ext-boost.git
synced 2024-12-23 09:25:39 +00:00
336 lines
14 KiB
C++
336 lines
14 KiB
C++
/*-----------------------------------------------------------------------------+
|
|
Copyright (c) 2009-2009: Joachim Faulhaber
|
|
+------------------------------------------------------------------------------+
|
|
Distributed under the Boost Software License, Version 1.0.
|
|
(See accompanying file LICENCE.txt or copy at
|
|
http://www.boost.org/LICENSE_1_0.txt)
|
|
+-----------------------------------------------------------------------------*/
|
|
#ifndef BOOST_ICL_DETAIL_ELEMENT_ITERATOR_HPP_JOFA_091104
|
|
#define BOOST_ICL_DETAIL_ELEMENT_ITERATOR_HPP_JOFA_091104
|
|
|
|
#include <boost/mpl/if.hpp>
|
|
#include <boost/iterator/iterator_facade.hpp>
|
|
#include <boost/config/warning_disable.hpp>
|
|
#include <boost/icl/type_traits/succ_pred.hpp>
|
|
#include <boost/icl/detail/mapped_reference.hpp>
|
|
|
|
namespace boost{namespace icl
|
|
{
|
|
|
|
//------------------------------------------------------------------------------
|
|
template<class Type>
|
|
struct is_std_pair
|
|
{
|
|
typedef is_std_pair<Type> type;
|
|
BOOST_STATIC_CONSTANT(bool, value = false);
|
|
};
|
|
|
|
template<class FirstT, class SecondT>
|
|
struct is_std_pair<std::pair<FirstT, SecondT> >
|
|
{
|
|
typedef is_std_pair<std::pair<FirstT, SecondT> > type;
|
|
BOOST_STATIC_CONSTANT(bool, value = true);
|
|
};
|
|
|
|
|
|
//------------------------------------------------------------------------------
|
|
template<class Type>
|
|
struct first_element
|
|
{
|
|
typedef Type type;
|
|
};
|
|
|
|
template<class FirstT, class SecondT>
|
|
struct first_element<std::pair<FirstT, SecondT> >
|
|
{
|
|
typedef FirstT type;
|
|
};
|
|
|
|
//------------------------------------------------------------------------------
|
|
template <class SegmentIteratorT> class element_iterator;
|
|
|
|
template<class IteratorT>
|
|
struct is_reverse
|
|
{
|
|
typedef is_reverse type;
|
|
BOOST_STATIC_CONSTANT(bool, value = false);
|
|
};
|
|
|
|
template<class BaseIteratorT>
|
|
struct is_reverse<std::reverse_iterator<BaseIteratorT> >
|
|
{
|
|
typedef is_reverse<std::reverse_iterator<BaseIteratorT> > type;
|
|
BOOST_STATIC_CONSTANT(bool, value = true);
|
|
};
|
|
|
|
template<class BaseIteratorT>
|
|
struct is_reverse<icl::element_iterator<BaseIteratorT> >
|
|
{
|
|
typedef is_reverse<icl::element_iterator<BaseIteratorT> > type;
|
|
BOOST_STATIC_CONSTANT(bool, value = is_reverse<BaseIteratorT>::value);
|
|
};
|
|
|
|
//------------------------------------------------------------------------------
|
|
template<class SegmentT>
|
|
struct elemental;
|
|
|
|
#ifdef ICL_USE_INTERVAL_TEMPLATE_TEMPLATE
|
|
|
|
template<class DomainT, ICL_COMPARE Compare, ICL_INTERVAL(ICL_COMPARE) Interval>
|
|
struct elemental<ICL_INTERVAL_TYPE(Interval,DomainT,Compare) >
|
|
{
|
|
typedef ICL_INTERVAL_TYPE(Interval,DomainT,Compare) segment_type;
|
|
typedef segment_type interval_type;
|
|
typedef DomainT type;
|
|
typedef DomainT domain_type;
|
|
typedef DomainT codomain_type;
|
|
typedef DomainT transit_type;
|
|
};
|
|
|
|
template< class DomainT, class CodomainT,
|
|
ICL_COMPARE Compare, ICL_INTERVAL(ICL_COMPARE) Interval >
|
|
struct elemental<std::pair<ICL_INTERVAL_TYPE(Interval,DomainT,Compare)const, CodomainT> >
|
|
{
|
|
typedef std::pair<ICL_INTERVAL_TYPE(Interval,DomainT,Compare), CodomainT> segment_type;
|
|
typedef ICL_INTERVAL_TYPE(Interval,DomainT,Compare) interval_type;
|
|
typedef std::pair<DomainT, CodomainT> type;
|
|
typedef DomainT domain_type;
|
|
typedef CodomainT codomain_type;
|
|
typedef mapped_reference<DomainT, CodomainT> transit_type;
|
|
};
|
|
|
|
#else //ICL_USE_INTERVAL_TEMPLATE_TYPE
|
|
|
|
template<ICL_INTERVAL(ICL_COMPARE) Interval>
|
|
struct elemental
|
|
{
|
|
typedef ICL_INTERVAL_TYPE(Interval,DomainT,Compare) segment_type;
|
|
typedef segment_type interval_type;
|
|
typedef typename interval_traits<interval_type>::domain_type domain_type;
|
|
typedef domain_type type;
|
|
typedef domain_type codomain_type;
|
|
typedef domain_type transit_type;
|
|
};
|
|
|
|
template< class CodomainT, ICL_INTERVAL(ICL_COMPARE) Interval >
|
|
struct elemental<std::pair<ICL_INTERVAL_TYPE(Interval,DomainT,Compare)const, CodomainT> >
|
|
{
|
|
typedef std::pair<ICL_INTERVAL_TYPE(Interval,DomainT,Compare), CodomainT> segment_type;
|
|
typedef ICL_INTERVAL_TYPE(Interval,DomainT,Compare) interval_type;
|
|
typedef typename interval_traits<interval_type>::domain_type domain_type;
|
|
typedef CodomainT codomain_type;
|
|
typedef std::pair<domain_type, codomain_type> type;
|
|
typedef mapped_reference<domain_type, codomain_type> transit_type;
|
|
};
|
|
|
|
#endif //ICL_USE_INTERVAL_TEMPLATE_TEMPLATE
|
|
|
|
|
|
//------------------------------------------------------------------------------
|
|
//- struct segment_adapter
|
|
//------------------------------------------------------------------------------
|
|
template<class SegmentIteratorT, class SegmentT>
|
|
struct segment_adapter;
|
|
|
|
#ifdef ICL_USE_INTERVAL_TEMPLATE_TEMPLATE
|
|
|
|
template<class SegmentIteratorT, class DomainT, ICL_COMPARE Compare, ICL_INTERVAL(ICL_COMPARE) Interval>
|
|
struct segment_adapter<SegmentIteratorT, ICL_INTERVAL_TYPE(Interval,DomainT,Compare) >
|
|
{
|
|
typedef segment_adapter type;
|
|
typedef ICL_INTERVAL_TYPE(Interval,DomainT,Compare) segment_type;
|
|
typedef segment_type interval_type;
|
|
typedef typename interval_type::difference_type domain_difference_type;
|
|
typedef DomainT domain_type;
|
|
typedef DomainT codomain_type;
|
|
typedef domain_type element_type;
|
|
typedef domain_type& transit_type;
|
|
|
|
static domain_type first (const SegmentIteratorT& leaper){ return leaper->first(); }
|
|
static domain_type last (const SegmentIteratorT& leaper){ return leaper->last(); }
|
|
static domain_difference_type length(const SegmentIteratorT& leaper){ return leaper->length();}
|
|
|
|
static transit_type transient_element(domain_type& inter_pos, const SegmentIteratorT& leaper,
|
|
const domain_difference_type& sneaker)
|
|
{
|
|
inter_pos = is_reverse<SegmentIteratorT>::value ? leaper->last() - sneaker
|
|
: leaper->first() + sneaker;
|
|
return inter_pos;
|
|
}
|
|
};
|
|
|
|
template < class SegmentIteratorT, class DomainT, class CodomainT,
|
|
ICL_COMPARE Compare, ICL_INTERVAL(ICL_COMPARE) Interval >
|
|
struct segment_adapter<SegmentIteratorT, std::pair<ICL_INTERVAL_TYPE(Interval,DomainT,Compare)const, CodomainT> >
|
|
{
|
|
typedef segment_adapter type;
|
|
typedef ICL_INTERVAL_TYPE(Interval,DomainT,Compare) interval_type;
|
|
typedef DomainT domain_type;
|
|
typedef std::pair<DomainT, CodomainT> element_type;
|
|
typedef CodomainT codomain_type;
|
|
typedef mapped_reference<DomainT, CodomainT> transit_type;
|
|
typedef typename difference_type_of<interval_traits<interval_type> >::type
|
|
domain_difference_type;
|
|
|
|
static domain_type first (const SegmentIteratorT& leaper){ return leaper->first.first(); }
|
|
static domain_type last (const SegmentIteratorT& leaper){ return leaper->first.last(); }
|
|
static domain_difference_type length(const SegmentIteratorT& leaper){ return leaper->first.length();}
|
|
|
|
static transit_type transient_element(domain_type& inter_pos, const SegmentIteratorT& leaper,
|
|
const domain_difference_type& sneaker)
|
|
{
|
|
inter_pos = is_reverse<SegmentIteratorT>::value ? leaper->first.last() - sneaker
|
|
: leaper->first.first() + sneaker;
|
|
return transit_type(inter_pos, leaper->second);
|
|
}
|
|
};
|
|
|
|
#else // ICL_USE_INTERVAL_TEMPLATE_TYPE
|
|
|
|
template<class SegmentIteratorT, ICL_INTERVAL(ICL_COMPARE) Interval>
|
|
struct segment_adapter
|
|
{
|
|
typedef segment_adapter type;
|
|
typedef ICL_INTERVAL_TYPE(Interval,DomainT,Compare) segment_type;
|
|
typedef segment_type interval_type;
|
|
typedef typename interval_traits<interval_type>::domain_type domain_type;
|
|
typedef domain_type codomain_type;
|
|
typedef domain_type element_type;
|
|
typedef domain_type& transit_type;
|
|
typedef typename difference_type_of<interval_traits<interval_type> >::type
|
|
domain_difference_type;
|
|
|
|
static domain_type first (const SegmentIteratorT& leaper){ return leaper->first(); }
|
|
static domain_type last (const SegmentIteratorT& leaper){ return leaper->last(); }
|
|
static domain_difference_type length(const SegmentIteratorT& leaper){ return icl::length(*leaper);}
|
|
|
|
static transit_type transient_element(domain_type& inter_pos, const SegmentIteratorT& leaper,
|
|
const domain_difference_type& sneaker)
|
|
{
|
|
inter_pos = is_reverse<SegmentIteratorT>::value ? icl::last(*leaper) - sneaker
|
|
: icl::first(*leaper) + sneaker;
|
|
return inter_pos;
|
|
}
|
|
};
|
|
|
|
template < class SegmentIteratorT, class CodomainT, ICL_INTERVAL(ICL_COMPARE) Interval >
|
|
struct segment_adapter<SegmentIteratorT, std::pair<ICL_INTERVAL_TYPE(Interval,DomainT,Compare)const, CodomainT> >
|
|
{
|
|
typedef segment_adapter type;
|
|
typedef ICL_INTERVAL_TYPE(Interval,DomainT,Compare) interval_type;
|
|
typedef typename interval_traits<interval_type>::domain_type domain_type;
|
|
typedef CodomainT codomain_type;
|
|
typedef std::pair<domain_type, codomain_type> element_type;
|
|
typedef mapped_reference<domain_type, CodomainT> transit_type;
|
|
typedef typename difference_type_of<interval_traits<interval_type> >::type
|
|
domain_difference_type;
|
|
|
|
static domain_type first (const SegmentIteratorT& leaper){ return leaper->first.first(); }
|
|
static domain_type last (const SegmentIteratorT& leaper){ return leaper->first.last(); }
|
|
static domain_difference_type length(const SegmentIteratorT& leaper){ return icl::length(leaper->first);}
|
|
|
|
static transit_type transient_element(domain_type& inter_pos, const SegmentIteratorT& leaper,
|
|
const domain_difference_type& sneaker)
|
|
{
|
|
inter_pos = is_reverse<SegmentIteratorT>::value ? icl::last(leaper->first) - sneaker
|
|
: icl::first(leaper->first) + sneaker;
|
|
return transit_type(inter_pos, leaper->second);
|
|
}
|
|
};
|
|
|
|
#endif // ICL_USE_INTERVAL_TEMPLATE_TEMPLATE
|
|
|
|
template <class SegmentIteratorT>
|
|
class element_iterator
|
|
: public boost::iterator_facade<
|
|
element_iterator<SegmentIteratorT>
|
|
, typename elemental<typename SegmentIteratorT::value_type>::transit_type
|
|
, boost::bidirectional_traversal_tag
|
|
, typename elemental<typename SegmentIteratorT::value_type>::transit_type
|
|
>
|
|
{
|
|
public:
|
|
typedef element_iterator type;
|
|
typedef SegmentIteratorT segment_iterator;
|
|
typedef typename SegmentIteratorT::value_type segment_type;
|
|
typedef typename first_element<segment_type>::type interval_type;
|
|
typedef typename elemental<segment_type>::type element_type;
|
|
typedef typename elemental<segment_type>::domain_type domain_type;
|
|
typedef typename elemental<segment_type>::codomain_type codomain_type;
|
|
typedef typename elemental<segment_type>::transit_type transit_type;
|
|
typedef transit_type value_type;
|
|
typedef typename difference_type_of<interval_traits<interval_type> >::type
|
|
domain_difference_type;
|
|
|
|
private:
|
|
typedef typename segment_adapter<segment_iterator,segment_type>::type adapt;
|
|
|
|
struct enabler{};
|
|
|
|
public:
|
|
element_iterator()
|
|
: _saltator(identity_element<segment_iterator>::value())
|
|
, _reptator(identity_element<domain_difference_type>::value()){}
|
|
|
|
explicit element_iterator(segment_iterator jumper)
|
|
: _saltator(jumper), _reptator(identity_element<domain_difference_type>::value()) {}
|
|
|
|
template <class SaltatorT>
|
|
element_iterator
|
|
( element_iterator<SaltatorT> const& other
|
|
, typename enable_if<boost::is_convertible<SaltatorT*,SegmentIteratorT*>, enabler>::type = enabler())
|
|
: _saltator(other._saltator), _reptator(other._reptator) {}
|
|
|
|
private:
|
|
friend class boost::iterator_core_access;
|
|
template <class> friend class element_iterator;
|
|
|
|
template <class SaltatorT>
|
|
bool equal(element_iterator<SaltatorT> const& other) const
|
|
{
|
|
return this->_saltator == other._saltator
|
|
&& this->_reptator == other._reptator;
|
|
}
|
|
|
|
void increment()
|
|
{
|
|
if(_reptator < icl::pred(adapt::length(_saltator)))
|
|
++_reptator;
|
|
else
|
|
{
|
|
++_saltator;
|
|
_reptator = identity_element<domain_difference_type>::value();
|
|
}
|
|
}
|
|
|
|
void decrement()
|
|
{
|
|
if(identity_element<domain_difference_type>::value() < _reptator)
|
|
--_reptator;
|
|
else
|
|
{
|
|
--_saltator;
|
|
_reptator = adapt::length(_saltator);
|
|
--_reptator;
|
|
}
|
|
}
|
|
|
|
value_type dereference()const
|
|
{
|
|
return adapt::transient_element(_inter_pos, _saltator, _reptator);
|
|
}
|
|
|
|
private:
|
|
segment_iterator _saltator; // satltare: to jump : the fast moving iterator
|
|
mutable domain_difference_type _reptator; // reptare: to sneak : the slow moving iterator 0 based
|
|
mutable domain_type _inter_pos; // inter position : Position within the current segment
|
|
// _saltator->first.first() <= _inter_pos <= _saltator->first.last()
|
|
};
|
|
|
|
}} // namespace icl boost
|
|
|
|
#endif // BOOST_ICL_DETAIL_ELEMENT_ITERATOR_HPP_JOFA_091104
|
|
|
|
|
|
|