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// sol2
// The MIT License (MIT)
// Copyright (c) 2013-2022 Rapptz, ThePhD and contributors
// Permission is hereby granted, free of charge, to any person obtaining a copy of
// this software and associated documentation files (the "Software"), to deal in
// the Software without restriction, including without limitation the rights to
// use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
// the Software, and to permit persons to whom the Software is furnished to do so,
// subject to the following conditions:
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
// FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
// COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
// IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
// CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
#ifndef SOL_INHERITANCE_HPP
#define SOL_INHERITANCE_HPP
#include <sol/types.hpp>
#include <sol/usertype_traits.hpp>
#include <sol/unique_usertype_traits.hpp>
namespace sol {
template <typename... Args>
struct base_list { };
template <typename... Args>
using bases = base_list<Args...>;
typedef bases<> base_classes_tag;
const auto base_classes = base_classes_tag();
template <typename... Args>
struct is_to_stringable<base_list<Args...>> : std::false_type { };
namespace detail {
inline decltype(auto) base_class_check_key() {
static const auto& key = "class_check";
return key;
}
inline decltype(auto) base_class_cast_key() {
static const auto& key = "class_cast";
return key;
}
inline decltype(auto) base_class_index_propogation_key() {
static const auto& key = u8"\xF0\x9F\x8C\xB2.index";
return key;
}
inline decltype(auto) base_class_new_index_propogation_key() {
static const auto& key = u8"\xF0\x9F\x8C\xB2.new_index";
return key;
}
template <typename T>
struct inheritance {
typedef typename base<T>::type bases_t;
static bool type_check_bases(types<>, const string_view&) {
return false;
}
template <typename Base, typename... Args>
static bool type_check_bases(types<Base, Args...>, const string_view& ti) {
return ti == usertype_traits<Base>::qualified_name() || type_check_bases(types<Args...>(), ti);
}
static bool type_check(const string_view& ti) {
return ti == usertype_traits<T>::qualified_name() || type_check_bases(bases_t(), ti);
}
template <typename... Bases>
static bool type_check_with(const string_view& ti) {
return ti == usertype_traits<T>::qualified_name() || type_check_bases(types<Bases...>(), ti);
}
static void* type_cast_bases(types<>, T*, const string_view&) {
return nullptr;
}
template <typename Base, typename... Args>
static void* type_cast_bases(types<Base, Args...>, T* data, const string_view& ti) {
// Make sure to convert to T first, and then dynamic cast to the proper type
return ti != usertype_traits<Base>::qualified_name() ? type_cast_bases(types<Args...>(), data, ti)
: static_cast<void*>(static_cast<Base*>(data));
}
static void* type_cast(void* voiddata, const string_view& ti) {
T* data = static_cast<T*>(voiddata);
return static_cast<void*>(ti != usertype_traits<T>::qualified_name() ? type_cast_bases(bases_t(), data, ti) : data);
}
template <typename... Bases>
static void* type_cast_with(void* voiddata, const string_view& ti) {
T* data = static_cast<T*>(voiddata);
return static_cast<void*>(ti != usertype_traits<T>::qualified_name() ? type_cast_bases(types<Bases...>(), data, ti) : data);
}
template <typename U>
static bool type_unique_cast_bases(types<>, void*, void*, const string_view&) {
return 0;
}
template <typename U, typename Base, typename... Args>
static int type_unique_cast_bases(types<Base, Args...>, void* source_data, void* target_data, const string_view& ti) {
using uu_traits = unique_usertype_traits<U>;
using base_ptr = typename uu_traits::template rebind_actual_type<Base>;
string_view base_ti = usertype_traits<Base>::qualified_name();
if (base_ti == ti) {
if (target_data != nullptr) {
U* source = static_cast<U*>(source_data);
base_ptr* target = static_cast<base_ptr*>(target_data);
// perform proper derived -> base conversion
*target = *source;
}
return 2;
}
return type_unique_cast_bases<U>(types<Args...>(), source_data, target_data, ti);
}
template <typename U>
static int type_unique_cast(void* source_data, void* target_data, const string_view& ti, const string_view& rebind_ti) {
if constexpr (is_actual_type_rebindable_for_v<U>) {
using rebound_actual_type = unique_usertype_rebind_actual_t<U>;
using maybe_bases_or_empty = meta::conditional_t<std::is_void_v<rebound_actual_type>, types<>, bases_t>;
string_view this_rebind_ti = usertype_traits<rebound_actual_type>::qualified_name();
if (rebind_ti != this_rebind_ti) {
// this is not even of the same unique type
return 0;
}
string_view this_ti = usertype_traits<T>::qualified_name();
if (ti == this_ti) {
// direct match, return 1
return 1;
}
return type_unique_cast_bases<U>(maybe_bases_or_empty(), source_data, target_data, ti);
}
else {
(void)rebind_ti;
string_view this_ti = usertype_traits<T>::qualified_name();
if (ti == this_ti) {
// direct match, return 1
return 1;
}
return type_unique_cast_bases<U>(types<>(), source_data, target_data, ti);
}
}
template <typename U, typename... Bases>
static int type_unique_cast_with(void* source_data, void* target_data, const string_view& ti, const string_view& rebind_ti) {
using uc_bases_t = types<Bases...>;
if constexpr (is_actual_type_rebindable_for_v<U>) {
using rebound_actual_type = unique_usertype_rebind_actual_t<U>;
using cond_bases_t = meta::conditional_t<std::is_void_v<rebound_actual_type>, types<>, uc_bases_t>;
string_view this_rebind_ti = usertype_traits<rebound_actual_type>::qualified_name();
if (rebind_ti != this_rebind_ti) {
// this is not even of the same unique type
return 0;
}
string_view this_ti = usertype_traits<T>::qualified_name();
if (ti == this_ti) {
// direct match, return 1
return 1;
}
return type_unique_cast_bases<U>(cond_bases_t(), source_data, target_data, ti);
}
else {
(void)rebind_ti;
string_view this_ti = usertype_traits<T>::qualified_name();
if (ti == this_ti) {
// direct match, return 1
return 1;
}
return type_unique_cast_bases<U>(types<>(), source_data, target_data, ti);
}
}
};
using inheritance_check_function = decltype(&inheritance<void>::type_check);
using inheritance_cast_function = decltype(&inheritance<void>::type_cast);
using inheritance_unique_cast_function = decltype(&inheritance<void>::type_unique_cast<void>);
} // namespace detail
} // namespace sol
#endif // SOL_INHERITANCE_HPP
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