Path: utzoo!attcan!uunet!aplcen!samsung!zaphod.mps.ohio-state.edu!shape.mps.ohio-state.edu!eao
From: eao@shape.mps.ohio-state.edu (Ed Overman)
Newsgroups: comp.text.tex
Subject: inconsistency between TeX 2.9 and 3.0
Message-ID: <1990Sep27.010730.1819@zaphod.mps.ohio-state.edu>
Date: 27 Sep 90 01:07:30 GMT
Sender: usenet@zaphod.mps.ohio-state.edu
Organization: Department of Mathematics, The Ohio State University
Lines: 30


We just installed TeX 3.0 here over the weekend and there seems to be
an inconsistency between the new and old versions.  I get different
results with the following:

\let\PAR=\par
\if\PAR\par (TRUE) \else (FALSE) \fi
\ifx\PAR\par (TRUE) \else (FALSE) \fi
\if\PAR\$ (TRUE) \else (FALSE) \fi
\ifx\PAR\$ (TRUE) \else (FALSE) \fi
\if\PAR\# (TRUE) \else (FALSE) \fi
\ifx\PAR\# (TRUE) \else (FALSE) \fi
\bye

TeX 3.0 prints out:
(TRUE) (TRUE)
(TRUE) (FALSE)
(TRUE) (FALSE)

TeX 2.9 (on my Atari since our sysop took the old version off our Suns already)
prints out:
(TRUE) (TRUE)
(FALSE) (FALSE)
(FALSE) (FALSE)

These cannot both be correct - can they?  Can anyone tell me which is correct
(I assume the old version but I am not sure I completely understand the
description of \if in Chapter 20).  If this is a bug has anyone else seen it?

                                   Thanks, Ed Overman