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106 lines
3.5 KiB
C++
106 lines
3.5 KiB
C++
// sol2
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// The MIT License (MIT)
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// Copyright (c) 2013-2017 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_INHERITANCE_HPP
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#define SOL_INHERITANCE_HPP
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#include "types.hpp"
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namespace sol {
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template <typename... Args>
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struct base_list {};
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template <typename... Args>
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using bases = base_list<Args...>;
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typedef bases<> base_classes_tag;
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const auto base_classes = base_classes_tag();
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namespace detail {
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template <typename T>
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struct has_derived {
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static bool value;
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};
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template <typename T>
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bool has_derived<T>::value = false;
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inline decltype(auto) base_class_check_key() {
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static const auto& key = "class_check";
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return key;
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}
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inline decltype(auto) base_class_cast_key() {
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static const auto& key = "class_cast";
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return key;
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}
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inline decltype(auto) base_class_index_propogation_key() {
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static const auto& key = u8"\xF0\x9F\x8C\xB2.index";
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return key;
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}
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inline decltype(auto) base_class_new_index_propogation_key() {
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static const auto& key = u8"\xF0\x9F\x8C\xB2.new_index";
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return key;
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}
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template <typename T, typename... Bases>
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struct inheritance {
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static bool type_check_bases(types<>, const std::string&) {
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return false;
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}
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template <typename Base, typename... Args>
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static bool type_check_bases(types<Base, Args...>, const std::string& ti) {
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return ti == usertype_traits<Base>::qualified_name() || type_check_bases(types<Args...>(), ti);
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}
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static bool type_check(const std::string& ti) {
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return ti == usertype_traits<T>::qualified_name() || type_check_bases(types<Bases...>(), ti);
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}
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static void* type_cast_bases(types<>, T*, const std::string&) {
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return nullptr;
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}
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template <typename Base, typename... Args>
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static void* type_cast_bases(types<Base, Args...>, T* data, const std::string& ti) {
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// Make sure to convert to T first, and then dynamic cast to the proper type
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return ti != usertype_traits<Base>::qualified_name() ? type_cast_bases(types<Args...>(), data, ti) : static_cast<void*>(static_cast<Base*>(data));
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}
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static void* type_cast(void* voiddata, const std::string& ti) {
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T* data = static_cast<T*>(voiddata);
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return static_cast<void*>(ti != usertype_traits<T>::qualified_name() ? type_cast_bases(types<Bases...>(), data, ti) : data);
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}
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};
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using inheritance_check_function = decltype(&inheritance<void>::type_check);
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using inheritance_cast_function = decltype(&inheritance<void>::type_cast);
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} // namespace detail
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} // namespace sol
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#endif // SOL_INHERITANCE_HPP
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