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105 lines
3.7 KiB
C++
105 lines
3.7 KiB
C++
// sol2
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// The MIT License (MIT)
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// Copyright (c) 2013-2018 Rapptz, ThePhD and contributors
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// Permission is hereby granted, free of charge, to any person obtaining a copy of
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// this software and associated documentation files (the "Software"), to deal in
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// the Software without restriction, including without limitation the rights to
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// use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
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// the Software, and to permit persons to whom the Software is furnished to do so,
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// subject to the following conditions:
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// The above copyright notice and this permission notice shall be included in all
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// copies or substantial portions of the Software.
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
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// FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
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// COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
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// IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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// CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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#ifndef SOL_STACK_QUALIFIED_GET_HPP
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#define SOL_STACK_QUALIFIED_GET_HPP
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#include "stack_get_unqualified.hpp"
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namespace sol {
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namespace stack {
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template <typename X>
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struct qualified_getter<X, std::enable_if_t<
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!std::is_reference<X>::value
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&& is_unique_usertype<meta::unqualified_t<X>>::value
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>> {
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typedef unique_usertype_traits<meta::unqualified_t<X>> u_traits;
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typedef typename u_traits::type T;
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typedef typename u_traits::actual_type Real;
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typedef typename u_traits::template rebind_base<void> rebind_t;
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static Real get(lua_State* L, int index, record& tracking) {
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tracking.use(1);
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void* memory = lua_touserdata(L, index);
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memory = detail::align_usertype_unique_destructor(memory);
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detail::unique_destructor& pdx = *static_cast<detail::unique_destructor*>(memory);
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if (&detail::usertype_unique_alloc_destroy<T, X> == pdx) {
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memory = detail::align_usertype_unique_tag<true, false>(memory);
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memory = detail::align_usertype_unique<Real, true, false>(memory);
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Real* mem = static_cast<Real*>(memory);
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return *mem;
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}
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Real r(nullptr);
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if (!derive<T>::value) {
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// TODO: abort / terminate, maybe only in debug modes?
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return r;
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}
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memory = detail::align_usertype_unique_tag<true, false>(memory);
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detail::unique_tag& ic = *reinterpret_cast<detail::unique_tag*>(memory);
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memory = detail::align_usertype_unique<Real, true, false>(memory);
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string_view ti = usertype_traits<T>::qualified_name();
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string_view rebind_ti = usertype_traits<rebind_t>::qualified_name();
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int cast_operation = ic(memory, &r, ti, rebind_ti);
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switch (cast_operation) {
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case 1: {
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// it's a perfect match,
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// alias memory directly
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Real* mem = static_cast<Real*>(memory);
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return *mem;
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}
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case 2:
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// it's a base match, return the
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// aliased creation
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return std::move(r);
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default:
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// uh oh..
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break;
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}
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// TODO: abort / terminate, maybe only in debug modes?
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return r;
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}
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};
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template <typename T>
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struct qualified_getter<T, std::enable_if_t<
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!std::is_reference<T>::value
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&& is_container<meta::unqualified_t<T>>::value
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&& !is_lua_primitive<T>::value
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&& !is_transparent_argument<T>::value
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>> {
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static T get(lua_State* L, int index, record& tracking) {
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if (type_of(L, index) == type::userdata) {
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return stack_detail::unchecked_unqualified_get<T>(L, index, tracking);
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}
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else {
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return stack_detail::unchecked_unqualified_get<sol::nested<T>>(L, index, tracking);
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}
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}
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};
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}
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} // namespace sol::stack
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#endif // SOL_STACK_QUALIFIED_GET_HPP
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