71 lines
1.9 KiB
C++
71 lines
1.9 KiB
C++
// Boost.TypeErasure library
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//
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// Copyright 2011 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: typeid_of.hpp 80909 2012-10-08 21:59:50Z steven_watanabe $
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#ifndef BOOST_TYPE_ERASURE_TYPEID_OF_HPP_INCLUDED
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#define BOOST_TYPE_ERASURE_TYPEID_OF_HPP_INCLUDED
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#include <boost/type_traits/remove_cv.hpp>
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#include <boost/type_traits/remove_reference.hpp>
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#include <boost/type_erasure/detail/access.hpp>
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#include <boost/type_erasure/any.hpp>
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#include <boost/type_erasure/binding.hpp>
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namespace boost {
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namespace type_erasure {
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/**
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* The first form returns the type currently stored in an @ref any.
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*
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* The second form returns the type corresponding to a
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* placeholder in @c binding.
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*
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* \pre @c Concept includes @ref typeid_ "typeid_<T>".
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* \pre @c T is a non-reference, CV-unqualified @ref placeholder.
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*/
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template<class Concept, class T>
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const std::type_info& typeid_of(const any<Concept, T>& arg)
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{
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return ::boost::type_erasure::detail::access::table(arg).template find<
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::boost::type_erasure::typeid_<
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typename ::boost::remove_cv<
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typename ::boost::remove_reference<T>::type
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>::type
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>
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>()();
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}
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#ifndef BOOST_TYPE_ERASURE_DOXYGEN
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template<class Concept, class T>
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const std::type_info& typeid_of(const param<Concept, T>& arg)
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{
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return ::boost::type_erasure::detail::access::table(arg).template find<
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::boost::type_erasure::typeid_<
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typename ::boost::remove_cv<
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typename ::boost::remove_reference<T>::type
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>::type
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>
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>()();
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}
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#endif
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/**
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* \overload
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*/
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template<class T, class Concept>
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const std::type_info& typeid_of(const binding<Concept>& binding_arg)
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{
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return binding_arg.template find< ::boost::type_erasure::typeid_<T> >()();
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}
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}
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}
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#endif
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