[texhax] A macro programming question

Philipp Stephani st_philipp at yahoo.de
Sat Apr 10 16:49:11 CEST 2010

Am 10.04.2010 um 07:11 schrieb Vafa Khalighi:

> I ask my question as an example
> I can say \hbox to 10pt{This is a test.}
> Now I want to define the macro \hboxR, so that when I say
> \hboxR to 10pt{This is a test.}
> it actually means
> \hbox to 10pt{\beginR This is a test\endR}
> Can \hboxR be defined like what I described?

Probably not with full generality.  The following is a partial solution with several issues:

\setbox0=\hboxR to 40pt{abc\hfil def}

With this definition, \hboxR can presumably act as a <box>, and the syntax is similar to \hbox.  However, no braces must occur in the "to" part, and the braces enclosing the box contents must be explicit.

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