From: Marius Vollmer <mvo@zagadka.ping.de>
Cc: guile-user@gnu.org
Subject: Re: [guile/scwm] 2nd argument problem to scm_definedp()
Date: 16 Sep 2002 21:42:01 +0200 [thread overview]
Message-ID: <87sn09lo1i.fsf@zagadka.ping.de> (raw)
In-Reply-To: <200209162049.54095.pieter.pareit@planetinternet.be>
P Pareit <pieter.pareit@planetinternet.be> writes:
> The c-code that modifies %load-path looks like creating %load-path
> in stead of adding strings to %load-path.
Can you show that code?
> I would first like to know if %load-path is
> already defined, in scheme code this would be: (and (defined? %load-path)
> (display "%load-path is defined") (newline)), it seems I cannot get the
> argument for _current_lexical_environment_ right:
If you want to default an optional argument from C, use SCM_UNDEFINED:
if (SCM_NFALSEP (scm_definedp (load_path_symbol, SCM_UNDEFINED)))
...
I guess you want the default. If not, things get messy. The lexical
environment that definedp expects is the data structure that gets
passed as the second argument to macro transformers.
--
GPG: D5D4E405 - 2F9B BCCC 8527 692A 04E3 331E FAF8 226A D5D4 E405
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next prev parent reply other threads:[~2002-09-16 19:42 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-09-16 18:49 [guile/scwm] 2nd argument problem to scm_definedp() P Pareit
2002-09-16 19:42 ` Marius Vollmer [this message]
2002-09-16 19:55 ` Rob Browning
2002-09-16 20:24 ` Marius Vollmer
2002-09-17 9:25 ` rm
2002-09-17 21:51 ` Marius Vollmer
2002-09-17 9:25 ` P Pareit
2002-09-17 13:53 ` P Pareit
2002-09-17 21:38 ` Marius Vollmer
2002-09-16 19:49 ` Rob Browning
2002-09-16 19:53 ` Rob Browning
2002-09-16 20:22 ` Marius Vollmer
2002-09-16 20:25 ` Rob Browning
2002-09-17 16:00 ` Rob Browning
2002-09-17 21:50 ` Marius Vollmer
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