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- To: DAVE.TOURETZKY at CMU-10A
- Subject: readtable hacking
- From: "Guy L. Steele, Jr." <GLS at MIT-MC>
- Date: Fri, 21 Sep 79 01:02:00 GMT
- Cc: SCOTT.FAHLMAN at MIT-MC, BUG-LISP at MIT-MC
- Original-date: 20 September 1979 21:02-EDT
Date: 20 Sep 1979 1743-EDT
From: DAVE.TOURETZKY at CMU-10A
I've had two requests from users for readtable hacks. Can you tell
me how to do the following?
1) Make ] be both a letter and a break character. Example: the
character sequence AB]CD should produce three atoms: AB, ], and CD.
Make ] have "single character object" syntax. The easiest way to do this
is to say (SETSYNTAX '/] 'SINGLE ()).
2) Implement an Interlisp-style "super paren", e.g. make ] or escape
insert enough right parens to close out the current s-expression.
Alternatively, it could insert some constant number of right parens,
providing we can make the constant big enough.
This is fairly difficult to do in the current set-up. Super-parens
were never installed in MacLISP because you don't need them very much
if you have a good screen editor, and they are rather ugly. Sorry.
Thanks, -- Dave Touretzky