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482 lines
18 KiB
C++
482 lines
18 KiB
C++
/*-----------------------------------------------------------------------------+
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Copyright (c) 2010-2010: Joachim Faulhaber
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+------------------------------------------------------------------------------+
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Distributed under the Boost Software License, Version 1.0.
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(See accompanying file LICENCE.txt or copy at
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http://www.boost.org/LICENSE_1_0.txt)
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+-----------------------------------------------------------------------------*/
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#ifndef BOOST_ICL_CONCEPT_ELEMENT_MAP_HPP_JOFA_100921
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#define BOOST_ICL_CONCEPT_ELEMENT_MAP_HPP_JOFA_100921
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#include <boost/mpl/and.hpp>
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#include <boost/mpl/not.hpp>
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#include <boost/icl/detail/on_absorbtion.hpp>
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#include <boost/icl/type_traits/unit_element.hpp>
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#include <boost/icl/type_traits/is_total.hpp>
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#include <boost/icl/type_traits/absorbs_identities.hpp>
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#include <boost/icl/type_traits/is_associative_element_container.hpp>
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#include <boost/icl/type_traits/is_combinable.hpp>
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#include <boost/icl/concept/map_value.hpp>
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#include <boost/icl/detail/map_algo.hpp>
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namespace boost{ namespace icl
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{
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//NOTE: Some forward declarations are needed by some compilers.
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template<class Type, class Predicate>
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typename enable_if<is_associative_element_container<Type>, Type>::type&
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erase_if(const Predicate& pred, Type& object);
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//==============================================================================
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//= Containedness<ElementMap>
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//==============================================================================
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//------------------------------------------------------------------------------
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//- bool within(c P&, c T&) T:{m} P:{b} fragment_types
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//------------------------------------------------------------------------------
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/** Checks if a key-value pair is in the map */
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template<class Type>
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typename enable_if<is_element_map<Type>, bool>::type
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within(const typename Type::element_type& value_pair, const Type& super)
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{
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typedef typename Type::const_iterator const_iterator;
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const_iterator found_ = super.find(value_pair.first);
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return found_ != super.end() && (*found_).second == value_pair.second;
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}
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//------------------------------------------------------------------------------
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//- bool contains(c T&, c P&) T:{m} P:{b} fragment_types
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//------------------------------------------------------------------------------
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template<class Type>
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typename enable_if<is_element_map<Type>, bool>::type
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contains(const Type& super, const typename Type::element_type& value_pair)
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{
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return icl::within(value_pair, super);
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}
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//==============================================================================
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//= Equivalences and Orderings<ElementMap>
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//==============================================================================
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/** Protonic equality is equality on all elements that do not carry an identity element as content. */
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template<class Type>
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inline typename enable_if<is_element_map<Type>, bool>::type
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is_distinct_equal(const Type& lhs, const Type& rhs)
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{
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return Map::lexicographical_distinct_equal(lhs, rhs);
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}
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//==============================================================================
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//= Addition<ElementMap>
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//==============================================================================
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/** \c add inserts \c value_pair into the map if it's key does
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not exist in the map.
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If \c value_pairs's key value exists in the map, it's data
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value is added to the data value already found in the map. */
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template <class Type>
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typename enable_if<is_element_map<Type>, Type>::type&
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add(Type& object, const typename Type::value_type& value_pair)
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{
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return object.add(value_pair);
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}
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/** \c add add \c value_pair into the map using \c prior as a hint to
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insert \c value_pair after the position \c prior is pointing to. */
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template <class Type>
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typename enable_if<is_element_map<Type>, typename Type::iterator>::type
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add(Type& object, typename Type::iterator prior,
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const typename Type::value_type& value_pair)
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{
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return object.add(prior, value_pair);
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}
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//==============================================================================
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//= Erasure
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//==============================================================================
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//------------------------------------------------------------------------------
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//- T& erase(T&, c P&) T:{m} P:{b} fragment_type
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//------------------------------------------------------------------------------
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template <class Type>
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typename enable_if<is_element_map<Type>, typename Type::size_type>::type
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erase(Type& object, const typename Type::element_type& value_pair)
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{
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typedef typename Type::size_type size_type;
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typedef typename Type::iterator iterator;
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typedef typename Type::on_identity_absorbtion on_identity_absorbtion;
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if(on_identity_absorbtion::is_absorbable(value_pair.second))
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return identity_element<size_type>::value();
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iterator it_ = object.find(value_pair.first);
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if(it_ != object.end() && value_pair.second == (*it_).second)
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{
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object.erase(it_);
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return unit_element<size_type>::value();
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}
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return identity_element<size_type>::value();
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}
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template<class Type>
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typename enable_if<is_element_map<Type>, Type>::type&
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erase(Type& object, const typename Type::set_type& erasure)
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{
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typedef typename Type::set_type set_type;
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ICL_const_FORALL(typename set_type, elem_, erasure)
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icl::erase(object, *elem_);
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return object;
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}
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//==============================================================================
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//= Subtraction
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//==============================================================================
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//------------------------------------------------------------------------------
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//- T& subtract(T&, c P&) T:{m} P:{b} fragment_type
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//------------------------------------------------------------------------------
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template <class Type>
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inline typename enable_if<is_element_map<Type>, Type>::type&
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subtract(Type& object, const typename Type::element_type& operand)
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{
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return object.subtract(operand);
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}
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//------------------------------------------------------------------------------
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//- T& subtract(T&, c P&) T:{m} P:{e} key_type
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//------------------------------------------------------------------------------
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template <class Type>
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typename enable_if<is_element_map<Type>, Type>::type&
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subtract(Type& object, const typename Type::domain_type& key_value)
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{
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return icl::erase(object, key_value);
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}
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//------------------------------------------------------------------------------
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//- T& subtract(T&, c P&) T:{m} P:{s} set key_type
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//------------------------------------------------------------------------------
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template <class Type>
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inline typename enable_if<is_element_map<Type>, Type>::type&
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operator -= (Type& object, const typename Type::set_type& operand)
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{
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typedef typename Type::set_type set_type;
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typedef typename set_type::const_iterator co_iterator;
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typedef typename Type::iterator iterator;
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co_iterator common_lwb_, common_upb_;
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if(!Set::common_range(common_lwb_, common_upb_, operand, object))
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return object;
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co_iterator it_ = common_lwb_;
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iterator common_;
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while(it_ != common_upb_)
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object.erase(*it_++);
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return object;
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}
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template <class Type>
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inline typename enable_if<is_element_map<Type>, Type>::type
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operator - (Type object, const typename Type::set_type& subtrahend)
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{
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return object -= subtrahend;
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}
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//==============================================================================
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//= Selective Update<ElementMap>
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//==============================================================================
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//------------------------------------------------------------------------------
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//- T& set_at(T&, c P&) T:{m} P:{b}
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//------------------------------------------------------------------------------
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template<class Type>
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inline typename enable_if<is_element_map<Type>, Type>::type&
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set_at(Type& object, const typename Type::element_type& operand)
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{
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typedef typename Type::iterator iterator;
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typedef typename Type::codomain_combine codomain_combine;
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typedef on_absorbtion<Type,codomain_combine,absorbs_identities<Type>::value>
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on_identity_absorbtion;
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if(!on_identity_absorbtion::is_absorbable(operand.second))
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{
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std::pair<iterator,bool> insertion = object.insert(operand);
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if(!insertion.second)
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insertion->second = operand.second;
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}
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return object;
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}
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//==============================================================================
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//= Intersection
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//==============================================================================
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template<class Type>
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inline typename enable_if<is_element_map<Type>, void>::type
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add_intersection(Type& section, const Type& object,
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const typename Type::element_type& operand)
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{
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object.add_intersection(section, operand);
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}
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template<class Type>
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inline typename enable_if<is_element_map<Type>, void>::type
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add_intersection(Type& section, const Type& object, const Type& operand)
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{
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ICL_const_FORALL(typename Type, it_, operand)
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icl::add_intersection(section, object, *it_);
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}
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//------------------------------------------------------------------------------
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//- T& op &=(T&, c P&) T:{m} P:{b m} fragment_types
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//------------------------------------------------------------------------------
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template<class Type>
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inline typename enable_if<mpl::and_<is_element_map<Type>, is_total<Type> >, Type>::type&
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operator &=(Type& object, const typename Type::element_type& operand)
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{
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object.add(operand);
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return object;
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}
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template<class Type>
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inline typename enable_if<mpl::and_<is_element_map<Type>, mpl::not_<is_total<Type> > >, Type>::type&
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operator &=(Type& object, const typename Type::element_type& operand)
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{
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Type section;
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icl::add_intersection(section, object, operand);
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object.swap(section);
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return object;
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}
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template<class Type>
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inline typename enable_if<is_element_map<Type>, Type>::type
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operator & (Type object, const typename Type::element_type& operand)
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{
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return object &= operand;
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}
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template<class Type>
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inline typename enable_if<is_element_map<Type>, Type>::type
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operator & (const typename Type::element_type& operand, Type object)
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{
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return object &= operand;
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}
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template<class Type>
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inline typename enable_if<mpl::and_<is_element_map<Type>, is_total<Type> >, Type>::type&
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operator &=(Type& object, const Type& operand)
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{
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object += operand;
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return object;
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}
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template<class Type>
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inline typename enable_if<mpl::and_<is_element_map<Type>, mpl::not_<is_total<Type> > >, Type>::type&
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operator &=(Type& object, const Type& operand)
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{
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Type section;
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icl::add_intersection(section, object, operand);
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object.swap(section);
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return object;
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}
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template<class Type>
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inline typename enable_if<is_element_map<Type>, Type>::type
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operator & (Type object, const typename Type::key_object_type& operand)
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{
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return object &= operand;
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}
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template<class Type>
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inline typename enable_if<is_element_map<Type>, Type>::type
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operator & (const typename Type::key_object_type& operand, Type object)
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{
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return object &= operand;
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}
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//==============================================================================
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//= Intersection<ElementMap> bool intersects(x,y)
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//==============================================================================
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template<class Type, class CoType>
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inline typename enable_if< mpl::and_< is_element_map<Type>
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, is_total<Type> >
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, bool>::type
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intersects(const Type&, const CoType&)
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{
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return true;
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}
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template<class Type>
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inline typename enable_if< mpl::and_< is_element_map<Type>
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, mpl::not_<is_total<Type> > >
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, bool>::type
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intersects(const Type& object, const typename Type::domain_type& operand)
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{
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return icl::contains(object, operand);
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}
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template<class Type>
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inline typename enable_if< mpl::and_< is_element_map<Type>
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, mpl::not_<is_total<Type> > >
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, bool>::type
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intersects(const Type& object, const typename Type::set_type& operand)
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{
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if(object.iterative_size() < operand.iterative_size())
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return Map::intersects(object, operand);
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else
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return Map::intersects(operand, object);
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}
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template<class Type>
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inline typename enable_if< mpl::and_< is_element_map<Type>
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, mpl::not_<is_total<Type> > >
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, bool>::type
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intersects(const Type& object, const typename Type::element_type& operand)
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{
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Type intersection;
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icl::add_intersection(intersection, object, operand);
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return !intersection.empty();
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}
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template<class Type>
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inline typename enable_if< mpl::and_< is_element_map<Type>
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, mpl::not_<is_total<Type> > >
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, bool>::type
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intersects(const Type& object, const Type& operand)
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{
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if(object.iterative_size() < operand.iterative_size())
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return Map::intersects(object, operand);
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else
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return Map::intersects(operand, object);
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}
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//==============================================================================
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//= Symmetric difference
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//==============================================================================
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template<class Type>
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inline typename enable_if<is_element_map<Type>, Type>::type&
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flip(Type& object, const typename Type::element_type& operand)
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{
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return object.flip(operand);
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}
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template<class Type, class CoType>
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inline typename enable_if< mpl::and_< is_element_map<Type>
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, is_total<Type>
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, absorbs_identities<Type> >
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, Type>::type&
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operator ^= (Type& object, const CoType&)
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{
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icl::clear(object);
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return object;
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}
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template<class Type>
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inline typename enable_if< mpl::and_< is_element_map<Type>
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, is_total<Type>
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, mpl::not_<absorbs_identities<Type> > >
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, Type>::type&
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operator ^= (Type& object, const typename Type::element_type& operand)
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{
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return object.flip(operand);
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}
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template<class Type>
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inline typename enable_if< mpl::and_< is_element_map<Type>
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, is_total<Type>
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, mpl::not_<absorbs_identities<Type> > >
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, Type>::type&
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operator ^= (Type& object, const Type& operand)
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{
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ICL_const_FORALL(typename Type, it_, operand)
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icl::flip(object, *it_);
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ICL_FORALL(typename Type, it2_, object)
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(*it2_).second = identity_element<typename Type::codomain_type>::value();
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return object;
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}
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template<class Type>
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inline typename enable_if< mpl::and_< is_element_map<Type>
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, mpl::not_<is_total<Type> > >
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, Type>::type&
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operator ^= (Type& object, const typename Type::element_type& operand)
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{
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return icl::flip(object, operand);
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}
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template<class Type>
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inline typename enable_if< mpl::and_< is_element_map<Type>
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, mpl::not_<is_total<Type> > >
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, Type>::type&
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operator ^= (Type& object, const Type& operand)
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{
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typedef typename Type::const_iterator const_iterator;
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const_iterator it_ = operand.begin();
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while(it_ != operand.end())
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icl::flip(object, *it_++);
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return object;
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}
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//==============================================================================
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//= Set selection
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//==============================================================================
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template<class Type>
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inline typename enable_if<is_element_map<Type>,
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typename Type::set_type>::type&
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domain(typename Type::set_type& domain_set, const Type& object)
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{
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typename Type::set_type::iterator prior_ = domain_set.end();
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typename Type::const_iterator it_ = object.begin();
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while(it_ != object.end())
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prior_ = domain_set.insert(prior_, (*it_++).first);
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return domain_set;
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}
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//==============================================================================
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//= Neutron absorbtion
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//==============================================================================
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template<class Type>
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inline typename enable_if<mpl::and_< is_element_map<Type>
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, absorbs_identities<Type> >, Type>::type&
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absorb_identities(Type& object)
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{
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typedef typename Type::element_type element_type;
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return icl::erase_if(content_is_identity_element<element_type>(), object);
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}
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template<class Type>
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inline typename enable_if<mpl::and_< is_element_map<Type>
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, mpl::not_<absorbs_identities<Type> > >
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, Type>::type&
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absorb_identities(Type&){}
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//==============================================================================
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//= Streaming<ElementMap>
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//==============================================================================
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template<class CharType, class CharTraits, class Type>
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inline typename enable_if<is_element_map<Type>, std::basic_ostream<CharType, CharTraits> >::type&
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operator << (std::basic_ostream<CharType, CharTraits>& stream, const Type& object)
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{
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stream << "{";
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ICL_const_FORALL(typename Type, it, object)
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stream << "(" << it->first << "->" << it->second << ")";
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return stream << "}";
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}
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}} // namespace boost icl
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#endif
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