Subject: Re: Splitting strings
From: (Rob Warnock)
Date: 1998/03/13
Newsgroups: comp.lang.lisp
Message-ID: <6eaa3s$>

Mike Dunn  <> wrote:
| FYI, the information is BASIC code read out of a text file using "read",
| which converts the next section of text into an object, stopping at
| whitespace.  An alternate solution would be to get read to stop at other
| things (a -, number, or a comma), but I'm not sure how to do this either.

I'd suggest reading the original BASIC file as "lines" (strings) and
doing the first-pass lexical parsing yourself (yes, with an ad-hoc lexer),
then perhaps calling "read-from-string" to intern the Lisp data once
you've found the lexical boundaries of the tokens. IMHO, it's a lot
easier than trying to second-guess Lisp's "read" (and it's also easier
to handle the inevitable error cases)...

That's what I did when writing an assembler in Scheme [don't ask], and
the lexer wasn't very big, just a few dozen lines of code.


Rob Warnock, 7L-551
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