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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_STACK_CHECK_QUALIFIED_GET_HPP
#define SOL_STACK_CHECK_QUALIFIED_GET_HPP
#include <sol/stack_core.hpp>
#include <sol/stack_check_get_unqualified.hpp>
#include <sol/optional.hpp>
namespace sol { namespace stack {
#if SOL_IS_ON(SOL_COMPILER_GCC)
#pragma GCC diagnostic push
#if !SOL_IS_ON(SOL_COMPILER_CLANG)
#pragma GCC diagnostic ignored "-Wmaybe-uninitialized"
#endif
#endif
namespace stack_detail {
template <typename OptionalType, typename T, typename Handler>
OptionalType get_optional(lua_State* L, int index, Handler&& handler, record& tracking) {
using Tu = meta::unqualified_t<T>;
if constexpr (is_lua_reference_v<T>) {
if constexpr (is_global_table_v<Tu>) {
(void)L;
(void)index;
(void)handler;
tracking.use(1);
return true;
}
else {
// actually check if it's none here, otherwise
// we'll have a none object inside an optional!
bool success = lua_isnoneornil(L, index) == 0 && stack::check<T>(L, index, &no_panic);
if (!success) {
// expected type, actual type
tracking.use(static_cast<int>(success));
handler(L, index, type::poly, type_of(L, index), "");
return {};
}
return OptionalType(stack_detail::unchecked_get<T>(L, index, tracking));
}
}
else if constexpr (!std::is_reference_v<T> && is_unique_usertype_v<Tu> && !is_actual_type_rebindable_for_v<Tu>) {
// we can take shortcuts here to save on separate checking, and just return nullopt!
using element = unique_usertype_element_t<Tu>;
using actual = unique_usertype_actual_t<Tu>;
tracking.use(1);
void* memory = lua_touserdata(L, index);
memory = detail::align_usertype_unique_destructor(memory);
detail::unique_destructor& pdx = *static_cast<detail::unique_destructor*>(memory);
if (&detail::usertype_unique_alloc_destroy<element, Tu> == pdx) {
memory = detail::align_usertype_unique_tag<true, false>(memory);
memory = detail::align_usertype_unique<actual, true, false>(memory);
actual* mem = static_cast<actual*>(memory);
return static_cast<actual>(*mem);
}
if constexpr (!derive<element>::value) {
return OptionalType();
}
else {
memory = detail::align_usertype_unique_tag<true, false>(memory);
detail::unique_tag& ic = *reinterpret_cast<detail::unique_tag*>(memory);
memory = detail::align_usertype_unique<actual, true, false>(memory);
string_view ti = usertype_traits<element>::qualified_name();
int cast_operation;
actual r {};
if constexpr (is_actual_type_rebindable_for_v<Tu>) {
using rebound_actual_type = unique_usertype_rebind_actual_t<Tu, void>;
string_view rebind_ti = usertype_traits<rebound_actual_type>::qualified_name();
cast_operation = ic(memory, &r, ti, rebind_ti);
}
else {
string_view rebind_ti("");
cast_operation = ic(memory, &r, ti, rebind_ti);
}
switch (cast_operation) {
case 1: {
// it's a perfect match,
// alias memory directly
actual* mem = static_cast<actual*>(memory);
return OptionalType(*mem);
}
case 2:
// it's a base match, return the
// aliased creation
return OptionalType(std::move(r));
default:
break;
}
return OptionalType();
}
}
else {
if (!check<T>(L, index, std::forward<Handler>(handler))) {
tracking.use(static_cast<int>(!lua_isnone(L, index)));
return OptionalType();
}
return OptionalType(stack_detail::unchecked_get<T>(L, index, tracking));
}
}
} // namespace stack_detail
#if SOL_IS_ON(SOL_COMPILER_GCC)
#pragma GCC diagnostic pop
#endif
template <typename T, typename>
struct qualified_check_getter {
typedef decltype(stack_detail::unchecked_get<T>(nullptr, -1, std::declval<record&>())) R;
template <typename Handler>
optional<R> get(lua_State* L, int index, Handler&& handler, record& tracking) {
return stack_detail::get_optional<optional<R>, T>(L, index, std::forward<Handler>(handler), tracking);
}
};
template <typename Optional>
struct qualified_getter<Optional, std::enable_if_t<meta::is_optional_v<Optional>>> {
static Optional get(lua_State* L, int index, record& tracking) {
using T = typename meta::unqualified_t<Optional>::value_type;
return stack_detail::get_optional<Optional, T>(L, index, &no_panic, tracking);
}
};
}} // namespace sol::stack
#endif // SOL_STACK_CHECK_QUALIFIED_GET_HPP
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