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| ANSI Common Lisp 23 Reader 23.2 Dictionary of Reader
23.2.3 make-dispatch-macro-character | Function
  Syntax: make-dispatch-macro-character char `&optional` non-terminating-p readtable t Arguments and Values: char - a character. non-terminating-p - a generalized boolean. The default is false. readtable - a readtable. The default is the current readtable. Description: make-dispatch-macro-character makes char be a dispatching macro character in readtable. Initially, every character in the dispatch table associated with the char has an associated function that signals an error of type reader-error. If non-terminating-p is true, the dispatching macro character is made a non-terminating macro character; if non-terminating-p is false, the dispatching macro character is made a terminating macro character. Examples:
       (get-macro-character #\{)   NIL, false
       (make-dispatch-macro-character #\{)   T
       (not (get-macro-character #\{))  false
The readtable is altered. See Also: *readtable*, set-dispatch-macro-character Allegro CL Implementation Details: None.

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