diff --git a/src/structs.h b/src/structs.h
index 4a82c82..f5ad174 100644
--- a/src/structs.h
+++ b/src/structs.h
@@ -1881,6 +1881,13 @@
 #define FC_NEW	    0x8000	// constructor
 #define FC_ABSTRACT 0x10000	// abstract method
 
+// Is "ufunc" an object method?
+#define IS_OBJECT_METHOD(ufunc) ((ufunc->uf_flags & FC_OBJECT) == FC_OBJECT)
+// Is "ufunc" a class new() constructor method?
+#define IS_CONSTRUCTOR_METHOD(ufunc) ((ufunc->uf_flags & FC_NEW) == FC_NEW)
+// Is "ufunc" an abstract class method?
+#define IS_ABSTRACT_METHOD(ufunc) ((ufunc->uf_flags & FC_ABSTRACT) == FC_ABSTRACT)
+
 #define MAX_FUNC_ARGS	20	// maximum number of function arguments
 #define VAR_SHORT_LEN	20	// short variable name length
 #define FIXVAR_CNT	12	// number of fixed variables