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// sol3
// The MIT License (MIT)
// Copyright (c) 2013-2019 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 "stack_core.hpp"
#include "stack_check_get_unqualified.hpp"
#include "optional.hpp"
namespace sol { namespace stack {
template <typename T, typename C>
struct qualified_check_getter {
typedef decltype(stack_detail::unchecked_get<T>(nullptr, -1, std::declval<record&>())) R;
template <typename Handler>
static optional<R> get(lua_State* L, int index, Handler&& handler, record& tracking) {
if constexpr (is_lua_reference_v<T>) {
// 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 nullopt;
}
return stack_detail::unchecked_get<T>(L, index, tracking);
}
else {
if (!check<T>(L, index, std::forward<Handler>(handler))) {
tracking.use(static_cast<int>(!lua_isnone(L, index)));
return nullopt;
}
return stack_detail::unchecked_get<T>(L, index, tracking);
}
}
};
template <typename T>
struct qualified_getter<optional<T>> {
static decltype(auto) get(lua_State* L, int index, record& tracking) {
return check_get<T>(L, index, no_panic, tracking);
}
};
#if defined(SOL_CXX17_FEATURES) && SOL_CXX17_FEATURES
template <typename T>
struct qualified_getter<std::optional<T>> {
static std::optional<T> get(lua_State* L, int index, record& tracking) {
if (!check<T>(L, index, no_panic)) {
tracking.use(static_cast<int>(!lua_isnone(L, index)));
return std::nullopt;
}
return stack_detail::unchecked_get<T>(L, index, tracking);
}
};
#endif // C++17 features
}} // namespace sol::stack
#endif // SOL_STACK_CHECK_QUALIFIED_GET_HPP
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