GNU bug report logs - #10250
Problems using optargs with function docstrings

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Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: Peter TB Brett <peter <at> peter-b.co.uk>
To: <bug-guile <at> gnu.org>
Subject: Problems using optargs with function docstrings
Date: Thu, 08 Dec 2011 11:01:30 +0000

There seems to be a nasty interference between the (ice-9 optargs)
module, Guile's support for function docstrings, and a function's
top-level definition context.

For example, the following works:

(use-modules (ice-9 optargs))
(define* (foo #:optional (bar "baz"))
(define (frob p) (display p) (newline))
(frob bar))
(foo)

with output:

baz

But when you add a docstring, it doesn't.

(use-modules (ice-9 optargs))
(define* (foo #:optional (bar "baz"))
"Docs go here"
(define (frob p) (display p) (newline))
(frob bar))
(foo)

This generates an error:

ERROR: In procedure memoization:
ERROR: Bad define placement (define (frob p) (display p) (newline)).

I'm not sure if this is a bug, but it looks like one to me. ;-)

Peter

-- 
Peter Brett <peter <at> peter-b.co.uk>
Remote Sensing Research Group
Surrey Space Centre

Message #8 received at 10250 <at> debbugs.gnu.org (full text, mbox):

From: Ian Price <ianprice90 <at> googlemail.com>
To: Peter TB Brett <peter <at> peter-b.co.uk>
Cc: 10250 <at> debbugs.gnu.org
Subject: Re: bug#10250: Problems using optargs with function docstrings
Date: Thu, 08 Dec 2011 23:39:22 +0000

Peter TB Brett <peter <at> peter-b.co.uk> writes:

> (use-modules (ice-9 optargs))
> (define* (foo #:optional (bar "baz"))
> "Docs go here"
> (define (frob p) (display p) (newline))
> (frob bar))
> (foo)
>
> This generates an error:
>
> ERROR: In procedure memoization:
> ERROR: Bad define placement (define (frob p) (display p) (newline)).
>
> I'm not sure if this is a bug, but it looks like one to me. ;-)
I'd agree, if I could reproduce it

scheme@(guile−user)> (use-modules (ice-9 optargs))
(define* (foo #:optional (bar "baz"))
"Docs go here"
(define (frob p) (display p) (newline))
(frob bar))
(foo)
baz
scheme@(guile−user)> ,describe foo
Docs go here
scheme@(guile−user)> 

Which version are you using? I'm on current stable-2.0(e7b2efd)

-- 
Ian Price

"Programming is like pinball. The reward for doing it well is
the opportunity to do it again" - from "The Wizardy Compiled"

Message #11 received at 10250 <at> debbugs.gnu.org (full text, mbox):

From: Peter TB Brett <peter <at> peter-b.co.uk>
To: Ian Price <ianprice90 <at> googlemail.com>
Cc: 10250 <at> debbugs.gnu.org
Subject: Re: bug#10250: Problems using optargs with function docstrings
Date: Thu, 08 Dec 2011 23:37:52 +0000

On Thu, 08 Dec 2011 23:39:22 +0000, Ian Price <ianprice90 <at> googlemail.com>
wrote:

> Which version are you using? I'm on current stable-2.0(e7b2efd)

This was with Guile 1.8.7 (guile-5:1.8.7-6.fc14).

-- 
Peter Brett <peter <at> peter-b.co.uk>
Remote Sensing Research Group
Surrey Space Centre

Message #16 received at 10250-done <at> debbugs.gnu.org (full text, mbox):

From: Andy Wingo <wingo <at> pobox.com>
To: Peter TB Brett <peter <at> peter-b.co.uk>
Cc: Ian Price <ianprice90 <at> googlemail.com>, 10250-done <at> debbugs.gnu.org
Subject: Re: bug#10250: Problems using optargs with function docstrings
Date: Fri, 09 Dec 2011 19:12:43 +0100

On Fri 09 Dec 2011 00:37, Peter TB Brett <peter <at> peter-b.co.uk> writes:

> On Thu, 08 Dec 2011 23:39:22 +0000, Ian Price <ianprice90 <at> googlemail.com>
> wrote:
>
>> Which version are you using? I'm on current stable-2.0(e7b2efd)
>
> This was with Guile 1.8.7 (guile-5:1.8.7-6.fc14).

Sounds like it's fixed in the 2.0.x series.  We would accept a patch to
fix it for 1.8.x, but I'm not going to work on it myself.

Regards, and happy hacking,

Andy
-- 
http://wingolog.org/

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