From: Hans Aberg <haberg-1@telia.com>
To: Mark H Weaver <mhw@netris.org>
Cc: guile-user@gnu.org, Thien-Thi Nguyen <ttn@gnuvola.org>
Subject: Re: Using guile as an extension language for GNU make
Date: Wed, 21 Sep 2011 10:24:44 +0200 [thread overview]
Message-ID: <833DDD3E-6D04-46D6-A021-6AFF0B4E87B7@telia.com> (raw)
In-Reply-To: <87r53aty3s.fsf@yeeloong.netris.org>
On 21 Sep 2011, at 04:42, Mark H Weaver wrote:
>> And finally, currently I have all unknown types expanding to the empty
>> string but now I'm thinking it would be better to start out more
>> restrictive and throw errors. This would ensure that people write their
>> Guile scripts correctly (giving valid return values) from the start, and
>> would let me, in the future, expand the supported types without breaking
>> anything.
>
> I agree wholeheartedly. If you are too permissive, it may cause
> programming errors to go unnoticed. It's better to limit the automatic
> conversions to common cases that are clearly useful. The other cases
> can be handled easily from Scheme.
>
> As for the suggestion to look at the pretty-printing library: I don't
> see why that would be useful. The purpose of that library is primarily
> to intelligently choose where to insert newlines in nested list
> structure, so that lines don't grow too long for the terminal display,
> and to add indentation as would be found in typical Scheme source code.
> It seems to me that these functions are undesirable for this purpose.
What I had in my mind is a more general "pretty-printing" object, which can override normal printing. For each object, one should be able define new printing. Perhaps Guile would need to have some kind of extension to achieve that.
Hans
next prev parent reply other threads:[~2011-09-21 8:24 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-09-18 0:10 Using guile as an extension language for GNU make Paul Smith
2011-09-18 12:10 ` Ludovic Courtès
2011-09-18 17:21 ` Embedding vs. Extending (was: Re: Using guile as an extension language for GNU make) Paul Smith
2011-09-18 21:48 ` Embedding vs. Extending Ludovic Courtès
2011-09-18 17:42 ` Using guile as an extension language for GNU make Paul Smith
2011-09-18 21:28 ` Ludovic Courtès
2011-09-18 15:30 ` Thien-Thi Nguyen
2011-09-18 19:28 ` Paul Smith
2011-09-19 0:28 ` Thien-Thi Nguyen
2011-09-19 15:14 ` Paul Smith
2011-09-19 19:41 ` Hans Aberg
2011-09-19 21:56 ` Paul Smith
2011-09-19 22:35 ` Hans Aberg
2011-09-19 23:00 ` Hans Aberg
2011-09-21 2:42 ` Mark H Weaver
2011-09-21 8:24 ` Hans Aberg [this message]
2011-09-20 16:17 ` Thien-Thi Nguyen
2011-09-20 17:31 ` Paul Smith
2011-09-20 19:02 ` Paul Smith
2011-09-21 0:48 ` Thien-Thi Nguyen
2011-09-20 20:39 ` Thien-Thi Nguyen
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