//
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// Copyright (c) Chris Glover, 2016.
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//
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//
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// Distributed under the Boost Software License, Version 1.0. (See accompanying
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// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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//
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#ifndef BOOST_TYPE_INDEX_RUNTIME_CAST_POINTER_CAST_HPP
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#define BOOST_TYPE_INDEX_RUNTIME_CAST_POINTER_CAST_HPP
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/// \file pointer_class.hpp
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/// \brief Contains the function overloads of boost::typeindex::runtime_cast for
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/// pointer types.
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#include <boost/type_index.hpp>
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#include <boost/type_index/runtime_cast/detail/runtime_cast_impl.hpp>
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#include <boost/type_traits/is_base_and_derived.hpp>
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#include <boost/type_traits/remove_pointer.hpp>
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#ifdef BOOST_HAS_PRAGMA_ONCE
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# pragma once
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#endif
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namespace boost { namespace typeindex {
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/// \brief Safely converts pointers to classes up, down, and sideways along the inheritance hierarchy.
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/// \tparam T The desired target type. Like dynamic_cast, must be a pointer to complete class type.
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/// \tparam U A complete class type of the source instance, u.
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/// \return If there exists a valid conversion from U* to T, returns a T that points to
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/// an address suitably offset from u. If no such conversion exists, returns NULL.
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template<typename T, typename U>
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T runtime_cast(U* u) BOOST_NOEXCEPT {
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typedef typename boost::remove_pointer<T>::type impl_type;
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return detail::runtime_cast_impl<impl_type>(u, boost::is_base_and_derived<T, U>());
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}
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/// \brief Safely converts pointers to classes up, down, and sideways along the inheritance hierarchy.
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/// \tparam T The desired target type. Like dynamic_cast, must be a pointer to complete class type.
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/// \tparam U A complete class type of the source instance, u.
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/// \return If there exists a valid conversion from U* to T, returns a T that points to
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/// an address suitably offset from u. If no such conversion exists, returns NULL.
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template<typename T, typename U>
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T runtime_cast(U const* u) BOOST_NOEXCEPT {
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typedef typename boost::remove_pointer<T>::type impl_type;
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return detail::runtime_cast_impl<impl_type>(u, boost::is_base_and_derived<T, U>());
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}
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/// \brief Safely converts pointers to classes up, down, and sideways along the inheritance
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/// hierarchy.
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/// \tparam T The desired target type to return a pointer to.
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/// \tparam U A complete class type of the source instance, u.
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/// \return If there exists a valid conversion from U const* to T*, returns a T*
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/// that points to an address suitably offset from u.
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/// If no such conversion exists, returns NULL.
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template<typename T, typename U>
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T* runtime_pointer_cast(U* u) BOOST_NOEXCEPT {
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return detail::runtime_cast_impl<T>(u, boost::is_base_and_derived<T, U>());
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}
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/// \brief Safely converts pointers to classes up, down, and sideways along the inheritance
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/// hierarchy.
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/// \tparam T The desired target type to return a pointer to.
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/// \tparam U A complete class type of the source instance, u.
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/// \return If there exists a valid conversion from U const* to T const*, returns a T const*
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/// that points to an address suitably offset from u.
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/// If no such conversion exists, returns NULL.
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template<typename T, typename U>
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T const* runtime_pointer_cast(U const* u) BOOST_NOEXCEPT {
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return detail::runtime_cast_impl<T>(u, boost::is_base_and_derived<T, U>());
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}
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}} // namespace boost::typeindex
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#endif // BOOST_TYPE_INDEX_RUNTIME_CAST_POINTER_CAST_HPP
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