🚀 go-pugleaf

thanks for the info.
"Bob Gonder" <notbg@notmindspring.invalid> wrote in message
news:mnt660lm9g2ebth873f7bpb93gcit1j409@4ax.com...
> p Anders wrote:
>
> >I have several macros defined - some use the parenthesis and some don't -
> >when are these required and when not?  Or maybe they're not required at
> >all???
>
> In general, no, they aren't required. But... you can get into trouble
> in some situations if they aren't used.... Consider
>
> #define SomeNumber 10+24*13+27
> int i = SomeNumber; /* ok */
> int j = SomeNumber+32; /* ok */
> int k = SomeNumber*7; /* ?? */
>
> IOW, where the macro is going to be used as a sub-expression,
> parenthesis are good.
>
> #define condition (i<j)
> if condition //  if (i<j)  ok
> if( condition ) //  if( (i<j) )  ok
> if ! condition //  if ! (i<j)  not ok
>
> But code generally doesn't contain parens, so putting parens around a
> code macro is probably wrong.
> Remember, everything you put in a macro, parens and all, goes into the
> expanded code. So, if you can't write the original code with parens,
> then you can't write the macro with them either.
>
>