GNU bug report logs - #43025
re-export-public-interface fails on Guile 3

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From: Leo Prikler <leo.prikler <at> student.tugraz.at>
To: Dale Smith <dalepsmith <at> gmail.com>
Cc: 43025 <at> debbugs.gnu.org
Subject: bug#43025: re-export-public-interface fails on Guile 3
Date: Wed, 26 Aug 2020 19:06:00 +0200

Am Mittwoch, den 26.08.2020, 12:51 -0400 schrieb Dale Smith:
> On 8/24/20, Leo Prikler <leo.prikler <at> student.tugraz.at> wrote:
> > My solution for this problem would be to build on some of the
> > module
> > "intrinsics", which sadly are not all that well documented.
> > 
> > (define-module (a))
> > 
> > (let ((obs (module-obarray (resolve-interface '(srfi srfi-1))))
> >       (iface (module-public-interface (current-module))))
> >   (hash-fold
> >    (lambda (key value seed)
> >      (module-add! iface key value)
> >      seed)
> >    *unspecified*
> >    obs))
> > 
> > If you want to make this a macro, you really only need to syntax-
> > unquote a module into the (resolve-interface ...) portion of this
> > snippet.
> 
> So with that in mind, how about something like this (currently no
> error checking):
> 
> (define-syntax re-export-public-interface
>   (syntax-rules ()
>     ((_ mod ...)
>      (let ((iface (module-public-interface (current-module))))
>        (module-for-each
>         (lambda (sym val)
>           (module-add! iface sym val)
>           (hashq-set! (module-replacements iface) sym #t))
>         (resolve-interface 'mod))
>        ...))))
LGTM, but don't forget to test it ;)
Also I'd call it `re-export-public-interface!', or even `re-export-and-
replace-interface!' but that's a personal preference.  

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