86 lines
2.6 KiB
C++
86 lines
2.6 KiB
C++
// Boost.TypeErasure library
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//
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// Copyright 2012 Steven Watanabe
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//
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// Distributed under the Boost Software License Version 1.0. (See
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// accompanying file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt)
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//
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// $Id: check_map.hpp 80883 2012-10-06 01:28:13Z steven_watanabe $
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#ifndef BOOST_TYPE_ERASURE_DETAIL_CHECK_MAP_HPP_INCLUDED
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#define BOOST_TYPE_ERASURE_DETAIL_CHECK_MAP_HPP_INCLUDED
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#include <boost/mpl/not.hpp>
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#include <boost/mpl/or.hpp>
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#include <boost/mpl/bool.hpp>
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#include <boost/mpl/set.hpp>
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#include <boost/mpl/has_key.hpp>
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#include <boost/mpl/find_if.hpp>
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#include <boost/mpl/end.hpp>
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#include <boost/type_traits/is_same.hpp>
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#include <boost/type_erasure/detail/get_placeholders.hpp>
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#include <boost/type_erasure/deduced.hpp>
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#include <boost/type_erasure/static_binding.hpp>
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namespace boost {
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namespace type_erasure {
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namespace detail {
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template<class T>
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struct is_deduced : boost::mpl::false_ {};
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template<class T>
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struct is_deduced< ::boost::type_erasure::deduced<T> > : boost::mpl::true_ {};
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// returns true if Map has a key for every non-deduced placeholder in Concept
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template<class Concept, class Map>
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struct check_map {
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typedef typename normalize_concept<Concept>::basic basic_components;
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// Every non-deduced placeholder referenced in this
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// map is indirectly deduced.
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typedef typename ::boost::type_erasure::detail::get_placeholder_normalization_map<
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Concept>::type placeholder_subs;
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typedef typename ::boost::mpl::fold<
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placeholder_subs,
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::boost::mpl::set0<>,
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::boost::mpl::insert<
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::boost::mpl::_1,
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::boost::mpl::second< ::boost::mpl::_2>
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>
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>::type indirect_deduced_placeholders;
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typedef typename ::boost::mpl::fold<
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basic_components,
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::boost::mpl::set0<>,
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::boost::type_erasure::detail::get_placeholders<
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::boost::mpl::_2,
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::boost::mpl::_1
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>
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>::type placeholders;
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typedef typename ::boost::is_same<
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typename ::boost::mpl::find_if<
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placeholders,
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::boost::mpl::not_<
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::boost::mpl::or_<
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::boost::type_erasure::detail::is_deduced< ::boost::mpl::_1>,
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::boost::mpl::has_key<Map, ::boost::mpl::_1>,
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::boost::mpl::has_key<indirect_deduced_placeholders, ::boost::mpl::_1>
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>
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>
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>::type,
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typename ::boost::mpl::end<placeholders>::type
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>::type type;
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};
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template<class Concept, class Map>
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struct check_map<Concept, ::boost::type_erasure::static_binding<Map> > :
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check_map<Concept, Map>
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{};
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}
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}
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}
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#endif
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