46 lines
1.5 KiB
C
46 lines
1.5 KiB
C
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#pragma once
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#include <entt/meta/factory.hpp>
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#include <entt/meta/resolve.hpp>
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#include <sol/sol.hpp>
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[[nodiscard]] entt::id_type get_type_id(const sol::table &obj) {
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const auto f = obj["type_id"].get<sol::function>();
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assert(f.valid() && "type_id not exposed to lua!");
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return f.valid() ? f().get<entt::id_type>() : -1;
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}
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template <typename T> [[nodiscard]] entt::id_type deduce_type(T &&obj) {
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switch (obj.get_type()) {
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// in lua: registry:has(e, Transform.type_id())
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case sol::type::number:
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return obj.template as<entt::id_type>();
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// in lua: registry:has(e, Transform)
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case sol::type::table:
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return get_type_id(obj);
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default:
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// TODO: Dont assert here. Maybe an exception could be thrown and caught by the ScriptingSystem?
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assert(false);
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return -1;
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}
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}
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// @see
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// https://github.com/skypjack/entt/wiki/Crash-Course:-runtime-reflection-system
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template <typename... Args>
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inline auto invoke_meta_func(entt::meta_type meta_type, entt::id_type function_id, Args &&...args) {
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if (!meta_type) {
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// TODO: Warning message
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} else {
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if (auto meta_function = meta_type.func(function_id); meta_function)
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return meta_function.invoke({}, std::forward<Args>(args)...);
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}
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return entt::meta_any{};
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}
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template <typename... Args>
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inline auto invoke_meta_func(entt::id_type type_id, entt::id_type function_id, Args &&...args) {
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return invoke_meta_func(entt::resolve(type_id), function_id, std::forward<Args>(args)...);
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}
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