GNU bug report logs - #10922
procedure-argumets does not work with advanced evaled lambdas

Previous Next

Full log

View this message in rfc822 format

From: help-debbugs <at> gnu.org (GNU bug Tracking System)
To: Stefan Israelsson Tampe <stefan.itampe <at> gmail.com>
Subject: bug#10922: closed (Re: bug#10922: procedure-argumets does not
 work with advanced evaled lambdas)
Date: Fri, 06 Jul 2012 12:17:06 +0000

[Message part 1 (text/plain, inline)]

Your bug report

#10922: procedure-argumets does not work with advanced evaled lambdas

which was filed against the guile package, has been closed.

The explanation is attached below, along with your original report.
If you require more details, please reply to 10922 <at> debbugs.gnu.org.

-- 
10922: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=10922
GNU Bug Tracking System
Contact help-debbugs <at> gnu.org with problems

[Message part 2 (message/rfc822, inline)]

From: Andy Wingo <wingo <at> pobox.com>
To: Stefan Israelsson Tampe <stefan.itampe <at> gmail.com>
Cc: 10922-done <at> debbugs.gnu.org
Subject: Re: bug#10922: procedure-argumets does not work with advanced evaled
	lambdas
Date: Fri, 06 Jul 2012 12:19:51 +0200

Fixed in fc835b1b, thanks for the report.

Andy
-- 
http://wingolog.org/

[Message part 3 (message/rfc822, inline)]

From: Stefan Israelsson Tampe <stefan.itampe <at> gmail.com>
To: bug-guile <at> gnu.org
Subject: procedure-argumets does not work with advanced evaled lambdas
Date: Thu, 1 Mar 2012 22:58:53 +0100

[Message part 4 (text/plain, inline)]

Here is a transcript of the problem

scheme@(guile-user)> (define f (lambda* (#:key x) x))
scheme@(guile-user)> (procedure-arguments f)

$53 = ((required) (optional) (keyword (#:x . 0)) (allow-other-keys? . #f)
(rest . #f))

scheme@(guile-user)> (define f (eval '(lambda* (#:key x) x)
(current-module)))
scheme@(guile-user)> (procedure-arguments f)

$54 = ((required) (optional) (keyword) (allow-other-keys? . #f) (rest .
%args))

Why is this important.

As an example trying to port rackets contract you have functions that take
a function
and return a new function with checks according to a contract added. the
functionality
is the same but input and output is checked. Now to use this, information
about the
keywords are needed in order to do some sanity checks that can be done at
construction
time. But if we eval a lambda and use that, we saw above that the
information is not added.
and the nice idea with contracts is broken.


Solution idea:

mod eval.scm and as described in session.scm make sure to add a 'arglist
procedure-property
to the newly constructed lambda with the appropriate information added.

Regards
Stefan

[Message part 5 (text/html, inline)]

Previous Next

GNU bug tracking system
Copyright (C) 1999 Darren O. Benham, 1997,2003 nCipher Corporation Ltd, 1994-97 Ian Jackson.