sol2/include/sol/object_base.hpp

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// sol2
// The MIT License (MIT)
2022-06-25 16:00:53 +08:00
// 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_OBJECT_BASE_HPP
#define SOL_OBJECT_BASE_HPP
#include <sol/reference.hpp>
#include <sol/stack.hpp>
namespace sol {
template <typename ref_t>
class basic_object_base : public ref_t {
private:
using base_t = ref_t;
template <typename T>
decltype(auto) as_stack(std::true_type) const {
return stack::get<T>(base_t::lua_state(), base_t::stack_index());
}
template <typename T>
decltype(auto) as_stack(std::false_type) const {
base_t::push();
return stack::pop<T>(base_t::lua_state());
}
template <typename T>
bool is_stack(std::true_type) const {
return stack::check<T>(base_t::lua_state(), base_t::stack_index(), &no_panic);
}
template <typename T>
bool is_stack(std::false_type) const {
int r = base_t::registry_index();
if (r == LUA_REFNIL)
return meta::any_same<meta::unqualified_t<T>, lua_nil_t, nullopt_t, std::nullptr_t>::value ? true : false;
if (r == LUA_NOREF)
return false;
auto pp = stack::push_pop(*this);
return stack::check<T>(base_t::lua_state(), -1, &no_panic);
}
public:
basic_object_base() noexcept = default;
basic_object_base(const basic_object_base&) = default;
basic_object_base(basic_object_base&&) = default;
basic_object_base& operator=(const basic_object_base&) = default;
basic_object_base& operator=(basic_object_base&&) = default;
template <typename T, typename... Args, meta::enable<meta::neg<std::is_same<meta::unqualified_t<T>, basic_object_base>>> = meta::enabler>
basic_object_base(T&& arg, Args&&... args) : base_t(std::forward<T>(arg), std::forward<Args>(args)...) {
}
template <typename T>
decltype(auto) as() const {
return as_stack<T>(is_stack_based<base_t>());
}
template <typename T>
bool is() const {
return is_stack<T>(is_stack_based<base_t>());
}
};
} // namespace sol
#endif // SOL_OBJECT_BASE_HPP