lispdoc - results for make-dispatch-macro-character

(make-dispatch-macro-character char &optional (non-terminating-p nil)
 (rt *readtable*))
Function: Cause CHAR to become a dispatching macro character in readtable (which defaults to the current readtable). If NON-TERMINATING-P, the char will be non-terminating.
 Mentioned in:
CLtL2 - 22.1.5. The Readtable
HyperSpec - Function MAKE-DISPATCH-MACRO-CHARACTER