You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and dots ('.'), can be up to 35 characters long. Letters must be lowercase.
335 lines
14 KiB
335 lines
14 KiB
/*-----------------------------------------------------------------------------+ |
|
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 |
|
|
|
|
|
|
|
|