+typedef struct _writeable {
+ code_t*write;
+ code_t*read;
+ multiname_t*type;
+} writeable_t;
+
+struct _typedcode {
+ code_t*c;
+ multiname_t*t;
+};
+struct _typedcode_list {
+ struct _typedcode typedcode;
+ struct _typedcode_list*nxt;
+};
+
+extern char start_of_expression;