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