Fix classes without _to_string() always returning "[Wrapped:0]"

Author: dsnopek

binding_generator.py

@@ -1723,6 +1723,11 @@ def generate_engine_class_header(class_api, used_classes, fully_used_classes, us
         result.append(f"\t~{class_name}();")
         result.append("")
 
+    if class_name == "Object":
+        result.append(
+            '\tString _to_string() const { return "[" + String(get_class()) + ":" + itos(get_instance_id()) + "]"; }'
+        )
+
     result.append("public:")
 
     # Special cases.

include/godot_cpp/classes/wrapped.hpp

@@ -93,7 +93,7 @@ class Wrapped {
 	bool _property_can_revert(const StringName &p_name) const { return false; }
 	bool _property_get_revert(const StringName &p_name, Variant &r_property) const { return false; }
 	void _validate_property(PropertyInfo &p_property) const {}
-	String _to_string() const { return "[" + String(get_class_static()) + ":" + itos(get_instance_id()) + "]"; }
+	String _to_string() const { return "[Wrapped:0]"; }
 
 	static void notification_bind(GDExtensionClassInstancePtr p_instance, int32_t p_what, GDExtensionBool p_reversed) {}
 	static GDExtensionBool set_bind(GDExtensionClassInstancePtr p_instance, GDExtensionConstStringNamePtr p_name, GDExtensionConstVariantPtr p_value) { return false; }
@@ -121,10 +121,6 @@ class Wrapped {
 		return string_name;
 	}
 
-	uint64_t get_instance_id() const {
-		return 0;
-	}
-
 	// Must be public but you should not touch this.
 	GodotObject *_owner = nullptr;
 };

test/project/main.gd

@@ -18,8 +18,7 @@ func _ready():
 
 	# To string.
 	assert_equal(example.to_string(),'[ GDExtension::Example <--> Instance ID:%s ]' % example.get_instance_id())
-	# It appears there's a bug with instance ids :-(
-	#assert_equal($Example/ExampleMin.to_string(), 'ExampleMin:[Wrapped:%s]' % $Example/ExampleMin.get_instance_id())
+	assert_equal($Example/ExampleMin.to_string(), '[ExampleMin:%s]' % $Example/ExampleMin.get_instance_id())
 
 	# Call static methods.
 	assert_equal(Example.test_static(9, 100), 109);