ANSI Common Lisp 22 Printer 22.1 The Lisp Printer 22.1.3 Default Print-Object Methods
188.8.131.52 Printing Random States
A specific syntax for printing objects of type random-state is
not specified. However, every implementation
must arrange to print a random state object in such a way that,
within the same implementation, read
can construct from the printed representation a copy of the
object as if the copy had been made by make-random-state.
If the type random state is effectively implemented
by using the machinery for defstruct,
the usual structure syntax can then be used for printing
objects; one might look something like
#S(RANDOM-STATE :DATA #(14 49 98436589 786345 8734658324 ... ))
where the components are implementation-dependent.