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113 lines
3.1 KiB
C++
113 lines
3.1 KiB
C++
// Copyright (c) 2004 Daniel Wallin and Arvid Norberg
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// Permission is hereby granted, free of charge, to any person obtaining a
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// copy of this software and associated documentation files (the "Software"),
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// to deal in the Software without restriction, including without limitation
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// the rights to use, copy, modify, merge, publish, distribute, sublicense,
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// and/or sell copies of the Software, and to permit persons to whom the
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// Software is furnished to do so, subject to the following conditions:
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// The above copyright notice and this permission notice shall be included
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// in all copies or substantial portions of the Software.
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF
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// ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
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// TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
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// PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT
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// SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR
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// ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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// ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE
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// OR OTHER DEALINGS IN THE SOFTWARE.
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#ifndef LUABIND_BACK_REFERENCE_040510_HPP
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#define LUABIND_BACK_REFERENCE_040510_HPP
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#include <luabind/lua_include.hpp>
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#include <luabind/wrapper_base.hpp>
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#include <luabind/detail/has_get_pointer.hpp>
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#include <luabind/get_pointer.hpp>
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#include <boost/type_traits/is_polymorphic.hpp>
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#include <boost/type_traits/is_const.hpp>
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#include <boost/mpl/if.hpp>
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namespace luabind {
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namespace detail
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{
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namespace mpl = boost::mpl;
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template<class T>
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wrap_base const* get_back_reference_aux0(T const* p, mpl::true_)
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{
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return dynamic_cast<wrap_base const*>(p);
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}
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template<class T>
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wrap_base const* get_back_reference_aux0(T const*, mpl::false_)
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{
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return 0;
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}
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template<class T>
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wrap_base const* get_back_reference_aux1(T const* p)
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{
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return get_back_reference_aux0(p, boost::is_polymorphic<T>());
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}
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template<class T>
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wrap_base const* get_back_reference_aux2(T const& x, mpl::true_)
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{
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return get_back_reference_aux1(get_pointer(x));
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}
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template<class T>
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wrap_base const* get_back_reference_aux2(T const& x, mpl::false_)
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{
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return get_back_reference_aux1(&x);
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}
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template<class T>
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wrap_base const* get_back_reference(T const& x)
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{
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return detail::get_back_reference_aux2(
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x
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, has_get_pointer<T>()
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);
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}
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} // namespace detail
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template<class T>
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bool get_back_reference(lua_State* L, T const& x)
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{
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#ifndef LUABIND_NO_RTTI
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if (wrap_base const* w = detail::get_back_reference(x))
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{
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detail::wrap_access::ref(*w).get(L);
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return true;
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}
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#endif
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return false;
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}
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template<class T>
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bool move_back_reference(lua_State* L, T const& x)
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{
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#ifndef LUABIND_NO_RTTI
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if (wrap_base* w = const_cast<wrap_base*>(detail::get_back_reference(x)))
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{
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assert(detail::wrap_access::ref(*w).m_strong_ref.is_valid());
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detail::wrap_access::ref(*w).get(L);
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detail::wrap_access::ref(*w).m_strong_ref.reset();
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return true;
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}
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#endif
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return false;
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}
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} // namespace luabind
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#endif // LUABIND_BACK_REFERENCE_040510_HPP
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