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From: dan@hpnmdla.HP.COM (Dan Pleasant)
Newsgroups: comp.sys.mac.programmer
Subject: Re: Annoying MPW C++ warning
Message-ID: <450015@hpnmdla.HP.COM>
Date: 20 Dec 90 17:56:08 GMT
References: <450014@hpnmdla.HP.COM>
Organization: HP Network Measurements Div, Santa Rosa, CA
Lines: 39

In comp.sys.mac.programmer, Bruce.Hoult@bbs.actrix.gen.nz writes:


>   Dan Pleasant writes:
>
>    >Does anyone know how to eliminate this annoying warning message in
>    >MPW C++?
>    > 
>    >void foo()
>    >{
>    >    Rect r, r2;
>    > 
>    >    r.left = 1;
>    >    r.right = 2;
>    >    r.bottom = 3;
>    >    r.top = 4;
>    > 
>    >    r2 = r;
>    >}
>    > 
>    >CFront gives a "variable 'r' used before set" warning for this code.
>
>
>    Mine doesn't (MPW CFront 1.0).  Once I #include <QuickDraw.h>, of course.
>    -- 
>    Bruce.Hoult@bbs.actrix.gen.nz   Twisted pair: +64 4 772 116
>    BIX: brucehoult                 Last Resort:  PO Box 4145 Wellington, NZ

Well, let this be a lesson to us all.  This problem popped up twice in
my "real" code, and I thought I had it completely pinned down so I
just posted the above code snippet.  The snippet, of course, compiles
perfectly.  My original code (which is obviously a great deal more
complicated than the snippet) still exhibits the problem.  Looks like
something more complicated is going on and it's back to the drawing
board.  *Sigh*

The moral: Don't post code snippets unless you test them first!

Dan Pleasant