make register_signal and auto-generated variadic funcitons use variadic templates to streamline their use

include/core/Defs.hpp

@@ -58,6 +58,42 @@ enum Error {
 	ERR_WTF = ERR_OMFG_THIS_IS_VERY_VERY_BAD ///< short version of the above
 };
 
+	namespace helpers {
+		template <typename T, typename ValueT>
+		T append_all (T appendable, ValueT value) {
+			appendable.append(value);
+			return appendable;
+		}
+
+		template <typename T, typename ValueT, typename... Args>
+		T append_all (T appendable, ValueT value, Args... args) {
+			appendable.append(value);
+			return append_all(appendable, args...);
+		}
+
+		template <typename T>
+		T append_all (T appendable) {
+			return appendable;
+		}
+
+		template <typename KV, typename KeyT, typename ValueT>
+		KV add_all (KV kv, KeyT key, ValueT value) {
+			kv[key] = value;
+			return kv;
+		}
+
+		template <typename KV, typename KeyT, typename ValueT, typename... Args>
+		KV add_all (KV kv, KeyT key, ValueT value, Args... args) {
+			kv[key] = value;
+			return add_all(kv, args...);
+		}
+
+		template <typename KV>
+		KV add_all (KV kv) {
+			return kv;
+		}
+	}
+
 }
 
 #include <stdio.h>

include/core/Godot.hpp

@@ -484,6 +484,11 @@ void register_signal(String name, Dictionary args = Dictionary())
 	}
 }
 
+template<class T, class... Args>
+void register_signal(String name, Args... varargs)
+{
+	register_signal<T>(name, helpers::add_all(Dictionary(), varargs...));
+}
 
 }