The less-familiar parts of Lisp for beginners — make-dispatch-macro-character

We next arrive at make-dispatch-macro-character.  I would suggest that the new Lisp user review the discussion on readtables and read-macros that can be found in the gensym and get-dispatch-macro-character articles.

The make-dispatch-macro-character function creates a new dispatching macro character (i.e. the first character of two-character read macros) for the read table.  It is initially constructed with all sub-characters set to signal errors.  Once make-dispatch-macro-character has built this new dispatch, the individual sub-characters can be assigned with set-dispatch-macro-character.

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