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Subject: Re: g++ Warnings
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Date: Sun, 31 Mar 2002 10:08:44 GMT
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Dong Soo Kim wrote:
> 
> On Sat, 30 Mar 2002, Eli Zaretskii wrote:
> 
> > It would be a very Bad Idea (tm) for GCC to flag those cases, since
> > they are widely used to shut up compiler warnings about variables
> > which the compiler things are used before they are initialized.
> > (Compilers can err about this because they don't understand what
> > range of values can certain variables have, and thus don't know what
> > conditions could fire under what circumstances.)
> 
> out of curiosity, could you give some examples of occasions you'd need
> to use that technique?

I think this will do it.  There are probably simpler demos.

void demo(void);
{
   int status = 2;
   int whatever;

   while (status) {
      switch (status) {
case 1:  status = 0;
         do {
            whatever++;
         while (whatever < 2);
         break;
case 2:  status = 1; whatever = 0; break;
default: break;
      }
   }
} /* demo */

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Chuck F (cbfalconer AT yahoo DOT com) (cbfalconer AT XXXXworldnet DOT att DOT net)
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