[Bug c/17257] Some assignment operators do not trigger "assignment used as * truth value" warning

Wed Sep 1 00:17:00 GMT 2004

------- Additional Comments From jsm at polyomino dot org dot uk  2004-09-01 00:17 -------
Subject: Re:  New: Some assignment operators do not trigger
 "assignment used as * truth value" warning

On Wed, 1 Sep 2004, tlambert2 at mindspring dot com wrote:

> /*
>  * Some assignment operators do not trigger "assignment used as
>  * truth value" warning.  This seems wrong.  The following code,
>  * when compiled with "-Wall" only causes the compiler to emit a
>  * single warning, only for the direct assignment.  The same effect
>  * is present on Macintosh (gcc 3.3 PPC) and Linux x86 platforms.
>  */

This is by design.  The warning is specifically for potential confusion 
between = and ==.

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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=17257