/usr/include/claw/multi_type_map.hpp is in libclaw-dev 1.7.4-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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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.hpp
* \brief This class can associate values of different types to a key.
* \author Julien Jorge
*/
#ifndef __CLAW_MULTI_TYPE_MAP_HPP__
#define __CLAW_MULTI_TYPE_MAP_HPP__
#include <claw/meta/no_type.hpp>
#include <claw/meta/type_list.hpp>
#include <map>
namespace claw
{
/**
* \brief This class provides types and methods to allow the call of methods
* for a given type in the inheritance of a multi_type_map.
* \remark This class is to be used internally.
*
* Suppose we have defined the following variable
*
* <tt>multi_type_map<int, type_list<std::string, type_list<int, no_type> > >
* my_map;</tt>
*
* The call <tt>int i = my_map.get<int>( 24 );</tt> doesn't match the type
* of the end class. So the call is repercuted on the parent class until the
* types match. Then, we can get the values in m_data.
*
* \b Template \b parameters
* - \a ValueType is the type of the values on which the action is done.
* - \a Map is the type of the map in which the action is done.
*
* \author Julien Jorge
*/
template<typename ValueType, typename Map>
class multi_type_map_wrapper;
/**
* \brief This class provides types and methods to allow the call of methods
* recursively along the inherintance hierarchy.
* \remark This class is to be used internally.
*/
template<typename Map>
class multi_type_map_helper;
/**
* \brief This class can associate values of different types to a key.
*
* \b Template \b parameters
* - \a Key The type to use for the keys.
* - \a TypeList The list of the types that the map should support.
*
* \b Type \b requirements
* - \a Key must be \a LessThanComparable.
* - The last type in \a TypeList must be claw::meta::no_type.
* - type_list_is_a_set<TypeList>::result == true
*
* \b Example
*
* <tt>multi_type_map<int, type_list<std::string, type_list<int, no_type> > >
* my_map;</tt>
*
* \author Julien Jorge
*/
template<typename Key, typename TypeList>
class multi_type_map;
/**
* \brief Partial specialization, to stop the inheritance recursivity.
*/
template<typename Key>
class multi_type_map<Key, meta::no_type>
{
}; // class multi_type_map
/**
* \brief This class can associate values of different types to a key.
* \author Julien Jorge
*/
template<typename Key, typename Head, typename Tail>
class multi_type_map< Key, meta::type_list<Head, Tail> >:
public multi_type_map<Key, Tail>
{
public:
typedef Key key_type;
typedef Head value_type;
typedef meta::type_list<Head, Tail> value_type_list;
typedef multi_type_map< Key, meta::type_list<Head, Tail> > self_type;
typedef std::map<key_type, value_type> container_type;
typedef multi_type_map<Key, Tail> super;
friend struct multi_type_map_wrapper<value_type, self_type>;
friend struct multi_type_map_helper<self_type>;
/** \brief This structure is used to create an iterator on the values of a
given type. */
template<typename ValueType>
struct iterator
{
/** \brief The type of the iterator. */
typedef typename std::map<key_type, ValueType>::iterator type;
/** \brief The type of the const_iterator. */
typedef
typename std::map<key_type, ValueType>::const_iterator const_type;
}; // struct iterator
private:
typedef typename iterator<value_type>::type iterator_type;
typedef typename iterator<value_type>::const_type const_iterator_type;
public:
template<typename ValueType>
void erase( typename iterator<ValueType>::type it );
template<typename ValueType>
std::size_t erase( const key_type& k );
template<typename ValueType>
const ValueType& get( const key_type& k ) const;
template<typename ValueType>
ValueType& get( const key_type& k );
template<typename ValueType>
void set( const key_type& k, const ValueType& v );
void set( const self_type& m );
template<typename ValueType>
bool exists( const key_type& k ) const;
std::size_t size() const;
template<typename ValueType>
typename iterator<ValueType>::type begin();
template<typename ValueType>
typename iterator<ValueType>::type end();
template<typename ValueType>
typename iterator<ValueType>::const_type begin() const;
template<typename ValueType>
typename iterator<ValueType>::const_type end() const;
private:
/** \brief Data stored for the first type of the list. */
container_type m_data;
}; // class multi_type_map
} // namespace claw
#include <claw/impl/multi_type_map.tpp>
#endif // __CLAW_MULTI_TYPE_MAP_HPP__
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