/*-----------------------------------------------------------------------------+ | |
Copyright (c) 2010-2010: 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_TYPE_TRAITS_IS_KEY_CONTAINER_OF_HPP_JOFA_100829 | |
#define BOOST_ICL_TYPE_TRAITS_IS_KEY_CONTAINER_OF_HPP_JOFA_100829 | |
#include <boost/icl/type_traits/is_combinable.hpp> | |
#include <boost/icl/type_traits/is_container.hpp> | |
namespace boost{ namespace icl | |
{ | |
//-------------------------------------------------------------------------- | |
namespace detail | |
{ | |
BOOST_MPL_HAS_XXX_TRAIT_DEF(key_object_type) | |
} | |
//-------------------------------------------------------------------------- | |
template <class Type> | |
struct has_key_object_type | |
: mpl::bool_<detail::has_key_object_type<Type>::value> | |
{}; | |
template <class Type, bool HasKeyContainerType, bool IsSet> | |
struct get_key_object_type; | |
template <class Type> | |
struct get_key_object_type<Type, false, false> | |
{ | |
typedef Type no_type; | |
}; | |
template <class Type> | |
struct get_key_object_type<Type, false, true> | |
{ | |
typedef Type type; | |
}; | |
template <class Type, bool IsSet> | |
struct get_key_object_type<Type, true, IsSet> | |
{ | |
typedef typename Type::key_object_type type; | |
}; | |
template <class Type> | |
struct key_container_type_of | |
{ | |
typedef typename | |
get_key_object_type | |
< Type | |
, has_key_object_type<Type>::value | |
, mpl::or_<is_set<Type>, is_map<Type> >::value | |
>::type type; | |
}; | |
//-------------------------------------------------------------------------- | |
template<class KeyT, class ObjectT> | |
struct is_strict_key_container_of // set is_strict_key_container_of map | |
{ | |
typedef is_strict_key_container_of<KeyT, ObjectT> type; | |
BOOST_STATIC_CONSTANT(bool, value = | |
(mpl::and_< is_map<ObjectT> | |
, boost::is_same<KeyT, typename key_container_type_of<ObjectT>::type> >::value) | |
); | |
}; | |
template<class KeyT, class ObjectT> | |
struct is_key_container_of // set is_key_container_of (set or map) | |
{ | |
typedef is_key_container_of<KeyT, ObjectT> type; | |
BOOST_STATIC_CONSTANT(bool, value = | |
(mpl::or_< is_strict_key_container_of<KeyT, ObjectT> | |
, mpl::and_< mpl::or_<is_set<ObjectT>, is_map<ObjectT> > | |
, boost::is_same<ObjectT, KeyT> > >::value) | |
); | |
}; | |
}} // namespace boost icl | |
#endif | |