🚀 go-pugleaf

In article <18AUG199202094046@reg.triumf.ca> asnd@reg.triumf.ca (Donald Arseneau) writes:
!In article <1992Aug18.020840.20852@organpipe.uug.arizona.edu!, mjm@spekl.as.arizona.edu (Mark McCaughrean) writes...
!! 
!!     In the middle of an \halign, I want to use \noalign to set a
!!paragraph of text (say). I want this paragraph to have the same
!!width as the table I'm setting using \halign. 
!
!A backwards answer: Use 
!  \halign to <dimen!{...}.
!
!!How do I get TeX
!!to tell me what the width of the table is, i.e. the width of the
!!vertical box I'm currently in the middle of? 
!
!You can't.  The width is undefined until the box is wrapped up.

!Donald Arseneau         asnd@reg.triumf.ca

Don, how about doing this?

Put the complete table in a setbox, say setbox0. Do not set it.

Then using a good editor simply recopy the table and use an
\halign to \wd0{ the same table with the \noalign
paragraph in the middle}

TeX works harder but it should do the job. 

Note, I have not tried this so the details may vary a bit.

Dave Rogers