On Wed, Apr 22, 2009 at 10:07:54AM +0100, Tomas Hlavaty wrote:
Are there other special symbols in the 32bit PicoLisp that behave
like NIL?
Not that I can think of any. Except for the mentioned example where
symbols look like numbers.
Cheers,
- Alex
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Hi Alex,
The question is: What is the correct way?
I am writing my own sexp reader which is safe against malicious input,
i.e. it does not call eval (the escape chars like ` are not
understood).
: (intern 123)
- 123
: (+ @ 7)
123 -- Number expected
I thought I could use
Hi Alex,
is there a function to look up an interned symbol?
'intern' does not seem to be doing that:
: (intern NIL)
- NIL
: (pack NIL)
- NIL
: (pack (intern NIL))
- NIL
:
This behaviour seems a bit strange to me. I would expect (pack
(intern NIL)) to return NIL...
Thank you,
Tomas
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