RetroBBS - comp.lang.lisp - Re: How to implement property list

Re: How to implement property list

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Newsgroups: comp.lang.lisp
Date: Tue, 27 Jul 2021 20:06:09 -0700 (PDT)
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Subject: Re: How to implement property list
From: sgonedes1977@gmail.com (steve gonedes)
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by: steve gonedes - Wed, 28 Jul 2021 03:06 UTC

On Wednesday, September 9, 2020 at 3:50:44 AM UTC-4, none albert wrote:
> I finally understand that property lists are much more
> essential to lisp than I thought. Also it seems that
> different properties may not at all be related even if they
> happen to apply to the same symbol.
>
> A naive approach for implementation is :
> - assuming a symbol has a token (probably a memory address or an index)
> - assuming a property has a name.

Yes, a symbol is like a data structure. It has slots (as we call them in lisp). One slot if the symbol-name, one slot for the function code, (function-lambda-expression #'fn-name) => will print the code.

Same with documentation.

ex:

; SLIME 2.26.1
CL-USER> (documentation 'list 'function)
"Construct and return a list containing the objects ARGS."
CL-USER> (documentation 'list 'variable)
NIL

cl-user >

To downgrade the human mind is bad theology. -- C. K. Chesterton

devel / comp.lang.lisp / Re: How to implement property list

devel / comp.lang.lisp / Re: How to implement property list

Subject	Author
Re: How to implement property list	steve gonedes