[gambit-list] explicit pp
Stéphane Le Cornec
coleste at videotron.ca
Fri Jul 24 10:55:31 EDT 2009
On 2009-7-24, at 1:35 , Marc Feeley wrote:
>
> On 24-Jul-09, at 12:56 AM, Stéphane Le Cornec wrote:
>
>> Is there a way to explicitly pretty-print? Something like:
>>
>>> (display '(a XXX b c))
>> (a
>> b c)
>>>
>>
>> i.e. XXX outputs as some (newline) + spaces.
>
> How about
>
> > (display '(a "\n " b c))
> (a
> b c)
>
> I'm probably not understanding your question... If you want to
> pretty print, why not use the pretty-print procedure? The display
> procedure seems like the wrong choice for pretty printing...
>
> Marc
>
pp has its own logic as to where the whitespace goes. Unless there's a
way to explicitly state where the (newline) should go...
Right now, there are a few place with code like this:
(display "(manifest " output)
(display name output)
(newline output)
(newline output)
(display " (version " output)
(write version output)
(display ")" output)
(newline output)
It would be oh so much clearer to handle it this way:
(write `(manifest ,name
(version ,version)
...) output)
This would read back properly, but it is not pretty enough to be human-
readable. So I'm trying to have that cake and eat it too, pretty code
and pretty output.
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