[pro] #; comments...

[Marco Antoniotti]

+1



On May 6, 2012, at 20:57 , Pascal Costanza wrote:

> Hi,
> 
> I'm thinking about writing up a CDR on #;-style comments. Currently, if you want to comment out a form from CL code, there is no standard way of doing this. Many people use something like #+nil, or similar tricks, but this is not 100% reliable. R6RS Scheme introduced #; as a solution, and this seems to become somewhat popular in CL as well.
> 
> Here is a suggested wording.
> 
> ------------- snip -----------------
> 
> #; is used to comment out single expressions; the syntax is /#; expression/. This textual notation is treated as whitespace; that is, it is as if the ``#; expression'' did not appear and only a space appeared in its place.
> 
> #; operates by skipping over the form. Skipping over the form is accomplished by binding *read-suppress* to true and then calling read.
> 
> ------------- snip -----------------
> 
> The text is based on 2.4.8.17 of the HyperSpec. Yes, this would be a fairly short CDR document.
> 
> Any comments or ideas about this?
> 
> 
> Best,
> Pascal
> 
> --
> Pascal Costanza
> 
> 
> 
> 
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--
Marco Antoniotti, Associate Professor				tel.	+39 - 02 64 48 79 01
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