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