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- /*-----------------------------------------------------------------------------+
- 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/mpl/has_xxx.hpp>
- #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
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