multi_type_map_visitor.tpp
/*
CLAW - a C++ Library Absolutely Wonderful
CLAW is a free library without any particular aim but being useful to
anyone.
Copyright (C) 2005-2011 Julien Jorge
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
contact: julien.jorge@gamned.org
*/
/**
* \file multi_type_map_visitor.tpp
* \brief Implementation of the claw::multi_type_map_visitor class.
* \author Julien Jorge
*/
namespace claw
{
/**
* \brief This class goes through all entries of a given type in a
* multi_type_map and apply a function to them.
* \author Julien Jorge
*/
template<typename Type>
class multi_type_map_visitor_process
{
public:
template<typename Key, typename TailType, typename Function>
void execute
( multi_type_map< Key, claw::meta::type_list<Type, TailType> >& m,
Function f )
{
typedef claw::meta::type_list<Type, TailType> type_list_type;
typedef multi_type_map<Key, type_list_type> map_type;
typedef typename map_type::template iterator<Type>::type iterator_type;
iterator_type it( m.template begin<Type>() );
const iterator_type eit( m.template end<Type>() );
while ( it!=eit )
{
iterator_type current(it);
++it;
f(current->first, current->second);
}
} // execute()
}; // class multi_type_map_visitor_process
/**
* \brief This class goes through all entries in a multi_type_map and apply a
* function to them.
* \author Julien Jorge
*/
template<typename Key, typename TypeList>
class multi_type_map_visitor_rec;
/**
* \brief Specialization of multi_type_map_visitor_rec for an empty type list.
* \author Julien Jorge
*/
template<typename Key>
class multi_type_map_visitor_rec<Key, claw::meta::no_type>
{
public:
template<typename Function>
void execute( multi_type_map<Key, claw::meta::no_type>& vars, Function f )
{
// nothing to do.
} // execute()
}; // class multi_type_map_visitor
/**
* \brief Specialization of multi_type_map_visitor_rec for a non empty type
* list.
* \author Julien Jorge
*/
template<typename KeyType, typename HeadType, typename TailType>
class multi_type_map_visitor_rec
< KeyType, claw::meta::type_list<HeadType, TailType> >
{
public:
template<typename Function>
void execute
( multi_type_map< KeyType, claw::meta::type_list<HeadType, TailType> >& m,
Function f )
{
multi_type_map_visitor_process<HeadType> process;
multi_type_map_visitor_rec<KeyType, TailType> rec_call;
process.execute( m, f );
rec_call.execute( m, f );
} // execute()
}; // class multi_type_map_visitor_rec
} // namespce claw
/*----------------------------------------------------------------------------*/
/**
* \brief Execute the visitor.
* \param m The map to visit.
* \param f The function to apply to the entries.
*/
template<typename Key, typename TypeList, typename Function>
void claw::multi_type_map_visitor::run
( multi_type_map<Key, TypeList>& m, Function f ) const
{
multi_type_map_visitor_rec<Key, TypeList> rec_call;
rec_call.execute( m, f );
} // multi_type_map_visitor::run()