cexp_op_t
cexp_op_t op;
cexp_op_t new_op = CEXP_OP_AND; /* to catch binop at start */
cexp_op_t op = STACK_TOP(lms.lms_cexp_op_stack);
STACK(cexp_op_t) lms_cexp_op_stack; /* Cond. expr operators */
cexp_push_op(cexp_op_t op)