- serialize X #!optional PORT SERIALIZERprocedure
Writes a binary representation of X into PORT which defaults to the value of (current-output-port). If the serialization is unable to handle some object, the procedure SERIALIZER is invoked with that object as it's sole argument. The procedure should either signal an error or return a placeholder object that is to be serialized instead. If no serializer is specified, an error will be signalled.