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From: dgk@ulysses.UUCP (David Korn)
Newsgroups: net.lang.c
Subject: Additions to C
Message-ID: <1294@ulysses.UUCP>
Date: Fri, 13-Jun-86 22:53:35 EDT
Article-I.D.: ulysses.1294
Posted: Fri Jun 13 22:53:35 1986
Date-Received: Tue, 17-Jun-86 07:36:30 EDT
Distribution: net
Organization: AT&T Bell Laboratories, Murray Hill
Lines: 20

There is one simple addition to the C language that I would like to see and
that would have been very helpful in some cases.  I would like to allow
a binary operator ?: with the following semantics:

E1 ?: E2 is equivalent to E1?E1:E2 except that E1 is not evaluated a
second time.

Note that E1 || E2 is similar but it only yields logical values.

Note that there are other operators that are like this already.
For example,

E1 += E2 is equivalent to E1 = E1 + E2 except that E1 is not evaluated
a second time.

I don't object to ?: being :?  (=+ became +=) but I think that this
change would be useful.

David Korn
ulysses!dgk