From: Mojca Miklavec <mojca.miklavec.lists@gmail.com>
To: Hans Hagen <pragma@wxs.nl>
Cc: mailing list for ConTeXt users <ntg-context@ntg.nl>
Subject: Re: How do I test for empty labeltext?
Date: Tue, 25 Oct 2011 11:26:47 +0200 [thread overview]
Message-ID: <CALBOmsY+X6hCCzvLk6gv8e1cZ3R91mVoQbQRYQSL7PE9-HQfLA@mail.gmail.com> (raw)
In-Reply-To: <4EA5B147.3060805@wxs.nl>
On Mon, Oct 24, 2011 at 20:41, Hans Hagen <pragma@wxs.nl> wrote:
> On 24-10-2011 19:41, Mojca Miklavec wrote:
>>
>> Hello,
>>
>> The following code
>>
>> \setuplabeltext[test=]
>> test is \doifemptyelse{\labeltext{test}}{empty}{not empty}
>>
>> doesn't work as intended for the reasons that I approximately
>> understand (not exactly, but I understand that there might be a lot of
>> weird stuff returned when I ask for labeltext). However I have no idea
>> how to check if text is empty or not.
>>
>> As an exception :) :) :), MKIV hints should be highly appreciated and
>> enough for this particular application.
>
> an empty test is always somewhat special as there can be an unexpandable
> macro inside that eventually expands to nothing
>
> you can try \doiftextelse instead
Thank you very much. This works fine.
This should probably be added to
http://wiki.contextgarden.net/System_Macros/Branches_and_Decisions
at least (possibly to reference next to labels as well), but I'm not
sure how to describe it.
Mojca
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next prev parent reply other threads:[~2011-10-25 9:26 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-10-24 17:41 Mojca Miklavec
2011-10-24 18:41 ` Hans Hagen
2011-10-25 9:26 ` Mojca Miklavec [this message]
2011-10-25 10:14 ` Hans Hagen
2011-10-25 16:36 ` Aditya Mahajan
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