-bool bus_type_is_valid(char c);
-bool bus_type_is_valid_in_signature(char c);
-bool bus_type_is_basic(char c);
-bool bus_type_is_trivial(char c);
-bool bus_type_is_container(char c);
-
-int bus_type_get_alignment(char c);
-int bus_type_get_size(char c);
+bool bus_type_is_valid(char c) _const_;
+bool bus_type_is_valid_in_signature(char c) _const_;
+bool bus_type_is_basic(char c) _const_;
+bool bus_type_is_trivial(char c) _const_;
+bool bus_type_is_container(char c) _const_;
+
+int bus_type_get_alignment(char c) _const_;
+int bus_type_get_size(char c) _const_;