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Subject: |
pretty-print #:width values above 49 don't work? |
Date: |
Sat, 31 May 2014 11:24:12 -0700 (PDT) |
Hi,
Neither example below should be line-wrapped, but the second one
is. It looks like pretty-print #:width values above 49 don't
work. Is there a workaround?
(pretty-print
'(234 . "901234567890123456789012345678901234567")
#:width 49)
=>
(234 . "901234567890123456789012345678901234567")
(pretty-print
'(234 . "9012345678901234567890123456789012345678")
#:width 50)
=>
(234
.
"9012345678901234567890123456789012345678")
$ ./config.guess
x86_64-unknown-linux-gnu
$ guile --version
Guile 1.8.8
Thanks!
- Mark
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--- Begin Message ---
Subject: |
Re: bug#17657: pretty-print #:width values above 49 don't work? |
Date: |
Tue, 21 Jun 2016 16:47:20 +0200 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/24.5 (gnu/linux) |
Hi :)
On Sun 01 Jun 2014 20:40, Mark H Weaver <address@hidden> writes:
> Mark Polesky <address@hidden> writes:
>> Neither example below should be line-wrapped, but the second one
>> is.
>
> Our pretty printer, inherited from SLIB and originally written by Marc
> Feeley, uses a great many heuristics to make formatting decisions.
> These heuristics are undocumented and subject to change.
>
> One of its heuristics is that individual expressions shall not be more
> than 49 columns wide. Notice that pretty-print.scm includes the
> following internal definition:
>
> (define max-expr-width 50)
>
> (although in fact the maximum width ends up being 49)
>
>> Is there a workaround?
>
> A couple of years ago I added an undocumented #:max-expr-width keyword
> argument to pretty-print, in order to improve the formatting of
> psyntax-pp.scm. You could use that.
Just pushed some documentation, so this bug is done.
> It would be good to redesign and rewrite our pretty-printer from scratch
> at some point.
Yes!
Andy
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