Hi Darin.

17-Apr-04 20:15:18, Darin McBride wrote to Jasen Betts


 DM> Good catch!

 JB>>   char *s=target-1;
 JB>>   while(*++s) {...};

 DM> Not supported by the standard ;-)

  is it's not legal to point outside the allocated memory
  even though that result is never used?

 DM> char* s = target;

 DM> if (*s != '\0')
 DM> {
 DM>   do {
 DM>     ...
 DM>   } while (*++s);
 DM> }

if pointers are iplemented in some other way than as some sort of integer
there's a possibility that subtracting 1 may give a state. that's not
corrected by adding 1

 DM> Unfortunately, I'm not sure that there is a more real example.  All I
 DM> know is that the standard does not guarantee what happens when you
 DM> point to memory that is not given to you by the compiler

hmm.

 DM> All that said, I'm not sure that the while loop version is better than
 DM> the for
 DM> loop version.  ;-

Me too. The for loop doesn't need an explicit check for an empty string.

 -=> Bye <=-

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