lispdoc - results for get-macro-character

(get-macro-character char &optional (rt-designator *readtable*))
Function: Return the function associated with the specified CHAR which is a macro character, or NIL if there is no such function. As a second value, return T if CHAR is a macro character which is non-terminating, i.e. which can be embedded in a symbol name.
 Mentioned in:
CLtL2 - 22.1.5. The Readtable
HyperSpec - Function SET-MACRO-CHARACTER, GET-MACRO-CHARACTER
On Lisp - Dispatching Macro Characters