From: "Smarasderagd" <firstname.lastname@example.org> To: email@example.com, firstname.lastname@example.org Subject: Re: New rc snapshot, includes "the equals hack" Date: Tue, 15 Aug 2000 17:51:20 -0500 [thread overview] Message-ID: <email@example.com> (raw) Tim Goodwin <firstname.lastname@example.org> writes: >A new, and possibly controversial, rc development snapshot is available >from the usual place. > > http://www.star.le.ac.uk/~tjg/rc/snap/rc-1.6s20000811.tar.gz > >There are a few minor bug fixes, and the addition of the `-I' flag >from the Plan9 rc (the opposite of `-i': this shell is definitely not >interactive). See the full list of changes since the last beta at the >end of this message. > >In addition, this snapshot includes a cunning patch by Thomas Nordin >that permits `=' to appear, unquoted, outside assignments. For ease of >reference, I'm calling this "the equals hack", where the word "hack" is >not intended to have any pejorative connotations... > >The equals hack, which in fact was just a one line addition to the >grammar, effectively makes `=' stand for `^'='^' (when it's not an >assignment). The slightly surprising feature of this is that `=' >swallows whitespace around it. > > ; echo a = b > a=b > >Apart from that, everything works as you would expect. Well, I suppose expr's '=' operator isn't much of an issue, and the '>=' and '<=' operators need to be quoted anyway (I think.) Make runs with null assignments to makefile variables would still not work right, though. make Q= target turns into make Q=target Putting the Q= at the end results in a syntax error due to the trailing implicit caret, and you'll run into this problem with a trailing = anywhere. I'd rather have a fix that works completely, or just go on quoting things as I have been.
next prev reply other threads:[~2000-08-16 0:21 UTC|newest] Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top 2000-08-15 14:32 smd 2000-08-15 22:51 ` Smarasderagd [this message] 2000-08-17 3:53 ` Decklin Foster 2000-08-21 23:21 ` Chris Siebenmann 2000-08-22 11:51 ` Carlo Strozzi 2000-08-17 10:49 ` Tim Goodwin -- strict thread matches above, loose matches on Subject: below -- 2000-08-23 1:03 Byron Rakitzis 2000-08-22 0:28 Byron Rakitzis 2000-08-22 23:23 ` Chris Siebenmann 2000-08-18 21:14 Bengt Kleberg 2000-08-15 20:25 smd 2000-08-15 7:28 Byron Rakitzis 2000-08-15 6:41 Byron Rakitzis 2000-08-11 14:01 Tim Goodwin 2000-08-15 2:21 ` Paul Haahr 2000-08-15 4:21 ` Gary Carvell 2000-08-15 14:52 ` Mark K. Gardner
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