[texhax] Question about \unvbox and longtable package

[VAFA KHALIGHI]

Thanks Phillip for the response.

To answer your questions, I need to say that if I use the followings instead
\unvbox\z@, the same problem appears so it seems that \unvbox\z@ is
unavoidable:

1- \box\z@

2- \copy\z@

However I could say \unvcopy\z at .  Why I put \vbox{\unvbox\z@}, it is because
I can not put \unvbox inside an \hbox as it is forbidden that is why I am
putting it as \hbox{\vbox{\unvbox\z@}}.

On Mon, Sep 19, 2011 at 2:40 AM, Philip TAYLOR (Webmaster, Ret'd) <
P.Taylor at rhul.ac.uk> wrote:

>
>
> VAFA KHALIGHI wrote:
>
> > In the attached minimal example, I have changed the definition
> > of \endlongtable and \LT at ntabularcr. In both, I have changed
> > \unvbox\z@ to \hbox{\vbox{\unvbox\z@}} and it no longer works
> > correctly (there is some vertical space at the end of page 1
> > and the last \hline in page 1 disappeared). Please do not ask
> > me why I am doind this. The reason is very clear. To make it RTL,
> > the only way is that I put this inside an \hbox. Do you think
> > there is a way that I can fix this or even if its fixable at all?
>
> Why you are doing it is solely your concern.  What I do not understand
> is the reason for \vbox{\unvbox\z@}.  Does \box \z@ potentially contain
> some stretchable or shrinkable glue that you wish to reset to
> unstretched/unshrunk ??
>
> Philip Taylor
>
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