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From: bright@dataio.Data-IO.COM (Walter Bright)
Newsgroups: comp.sys.ibm.pc
Subject: Re: 2 bugs in Turbo C
Message-ID: <1322@dataio.Data-IO.COM>
Date: Thu, 18-Jun-87 14:05:14 EDT
Article-I.D.: dataio.1322
Posted: Thu Jun 18 14:05:14 1987
Date-Received: Sun, 21-Jun-87 14:12:43 EDT
References: <2879@zen.berkeley.edu> <3320022@hpsrlc.HP.COM>
Reply-To: bright@dataio.UUCP (Walter Bright)
Organization: Data I/O - FutureNet Corp., Redmond, WA
Lines: 24

In article <3320022@hpsrlc.HP.COM> darrylo@hpsrlc.HP.COM (Darryl Okahata) writes:
>Even with the bugs it has (the ones above don't bother me as patches have
>been issued), I like Turbo C (the compile speed is WONDERFUL).  Having
>warnings like "possibly incorrect assignment" in an "if" statement (should
>be equality, not assignment) is really nice!

Datalight C has been issuing this warning for the last year and a half. It
will also issue the same warning on things like:
	while (a = b)
		...
and on
	d = a && b = c;
		...
Basically, the warning is given whenever an assignment is implicitly
tested for 0 or !=0. To get rid of the warning, compile with -w or:
	while ((a = b) != 0)
		...
and
	d = a && (b = c) != 0;
This will also flag to the person maintaining your code that you really
did mean the assignment.

Disclaimer: I have no connection with Datalight other than the fact that
I wrote the compiler and receive money from sales of it.