GNU bug report logs - #10991
syntax-local-binding does not play well with fluid-let-syntax

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From: help-debbugs <at> gnu.org (GNU bug Tracking System)
To: Andy Wingo <wingo <at> pobox.com>
Cc: tracker <at> debbugs.gnu.org
Subject: bug#10991: closed (syntax-local-binding does not play well with
 fluid-let-syntax)
Date: Wed, 13 Mar 2013 10:46:02 +0000

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Your message dated Wed, 13 Mar 2013 11:44:36 +0100
with message-id <87obeninor.fsf <at> pobox.com>
and subject line Re: bug#10991: syntax-local-binding does not play well with fluid-let-syntax
has caused the debbugs.gnu.org bug report #10991,
regarding syntax-local-binding does not play well with fluid-let-syntax
to be marked as done.

(If you believe you have received this mail in error, please contact
help-debbugs <at> gnu.org.)


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10991: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=10991
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From: Stefan Israelsson Tampe <stefan.itampe <at> gmail.com>
To: bug-guile <at> gnu.org
Subject: syntax-local-binding does not play well with fluid-let-syntax
Date: Sun, 11 Mar 2012 12:47:22 +0100

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loading local-stx shows that setting a macro via fluid-let-syntax does not
play well with syntax-local-binding who just sees the outside main
definition and not the newly introduced binding!
 -------------------

(use-modules (system syntax))
(use-modules (srfi srfi-11))

(eval-when (compile load eval)
  (define (%f x) (error "this macro should never be called")))

(define-syntax f %f)

(define-syntax info
  (lambda (x)
    (syntax-case x ()
      ((_ f)
       (let-values (((key ret) (syntax-local-binding #'f)))
         (pk key)
         ret)))))

;;This shows that f rebounds to yield #t but the info returns %f
(eq?
 (fluid-let-syntax ((f (lambda x #'#t)))
   (pk (f 1))
   (info f))
 %f)

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From: Andy Wingo <wingo <at> pobox.com>
To: Stefan Israelsson Tampe <stefan.itampe <at> gmail.com>
Cc: 10991-done <at> debbugs.gnu.org
Subject: Re: bug#10991: syntax-local-binding does not play well with
	fluid-let-syntax
Date: Wed, 13 Mar 2013 11:44:36 +0100

On Sun 23 Sep 2012 12:22, Stefan Israelsson Tampe <stefan.itampe <at> gmail.com> writes:

> What's perhaps is missing is a simple change to local-syntax-value to
> add a keyword so that one can decide if one wants the definition value
> of the syntax parameter.

I have added this in master (to syntax-local-binding) and documented
it.  Closing this bug.

Andy
-- 
http://wingolog.org/

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