From: Kristaps Dzonsons <kristaps@bsd.lv>
To: "tech@mdocml.bsd.lv" <tech@mdocml.bsd.lv>
Subject: Re: Symbols and troff conditionals
Date: Thu, 10 Jun 2010 23:42:16 +0200 [thread overview]
Message-ID: <4C115C38.8050603@bsd.lv> (raw)
In-Reply-To: <4C1152F3.2010407@bsd.lv>
Kristaps Dzonsons wrote:
> Hi Ulrich, these aren't really regressions, but rather unsupported
> behaviour. mandoc(1) isn't smart enough to do full conditional
> evaluation, so, and I'll note it in the file...
>
>> .if n\
>> (r,theta)
>> .if t\
>> (r,\(*h)
>
> after line concatenation looks like
>
> .if n(r,theta)
> .if t(r,\(*h)
>
> to mandoc, which subsequently barfs because it reads conditionals as
> text up until space or eoln. So the conditional is "n(r,theta)", which
> is true as "n" is first, but obviously there's no body except for the
> subsequent "if".
Ok, I made it a tad bit smarter. Now, from roff.7:
COND is a conditional statement. roff allows for complicated
conditionals; mandoc is much simpler. At this time, mandoc
supports only `n', evaluating to true; and `t', `e', and `o',
evaluating to false. All other invocations are read up to the
next end of line or space and evaluate as false.
Thus, the `n' is correctly parsed, in your example, and it spits out the
correct manual. I added a regression test to this effect.
Thanks,
Kristaps
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prev parent reply other threads:[~2010-06-10 21:42 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-06-09 16:28 Ulrich Spörlein
2010-06-09 19:32 ` Kristaps Dzonsons
2010-06-09 20:11 ` Kristaps Dzonsons
2010-06-10 6:32 ` Ulrich Spörlein
2010-06-10 21:02 ` Kristaps Dzonsons
2010-06-10 21:42 ` Kristaps Dzonsons [this message]
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