Path: utzoo!utgpu!water!watmath!clyde!att!osu-cis!killer!dcs!wnp
From: wnp@dcs.UUCP (Wolf N. Paul)
Newsgroups: comp.text
Subject: Re: troff magic
Message-ID: <195@dcs.UUCP>
Date: 3 Sep 88 02:54:45 GMT
References: <597@intvax.UUCP> <191@dcs.UUCP> <3888@pbhyf.PacBell.COM>
Reply-To: wnp@dcs.UUCP (Wolf N. Paul)
Organization: DCS, Dallas, Texas
Lines: 18

In article <3888@pbhyf.PacBell.COM> kjk@pbhyf.PacBell.COM (Ken Keirnan) writes:
 >>As far as I can tell, this assumes that you are at the beginning of
 >>an output line. It prints the argument ( $1 ), then draws a line from the
 >>current print position (i.e. immediately after the argument) to absolute
 >>horizontal position 0 (i.e., back to the beginning of the line. It also
 >>leaves the current print position to be at the beginning of the line --
 >>thus it makes a good example, but is of little practical value. 
 >
 >The absolute position indicator, "|" is relative to the "input" line
 >not the "output" line for horizontal motion.  That is why the above
 >macro will work as expected and only underline the argument $1, which,
 >in this case, is the "input" line.

Thanks for this clarification -- I hadn't realized this. 
-- 
Wolf N. Paul * 3387 Sam Rayburn Run * Carrollton TX 75007 * (214) 306-9101
UUCP:     killer!dcs!wnp                 ESL: 62832882
DOMAIN:   dcs!wnp@killer.dallas.tx.us    TLX: 910-380-0585 EES PLANO UD