Re: ppThrow () flaws

[Matt Slot <fprefect@ambrosiasw.com>]

 > This works fine as long as ppThrow is evaluated. But if it's not,
 > ResumeNormalWork () is called even if (correct == false). That's wrong.
 > "ppThrow (..)" has to be replaced by "return errorindicator" in that case.

The if..else cases of most macros tend to be delicate. I use:

#ifdef DEBUG
  #define MyThrow(x,y)  do { printf("failure %ld : %s\n", x, y); } while(0)
#else
  #define MyThrow(x,y)  do { } while(0)
#endif

Notice, there is no semicolon.

This is a normal statement that's evaluated once, and lets you declare
temporary variables safely -- even in C. Any compiler worth it's salt
will optimize out the loop. About the only thing you can't do is use
the macro as an r-value.

Matt



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