Well,
> Grrr. I wish I could reclaim all the time I've spent looking for
> misplaced curly braces for complicated Exim expressions. It really is
> an eye-reddening nightmare. (FWIW, I usually end up making Exim macros
> for logically complete subparts of such complicated expressions, and
> then I usually get the syntax right within a couple of hundred tries. :-)
Exim's macros are nothing more than a sort of string expansion. But
these macros are no separate functions which return a value. They just
replace the code at runtime. That means a code like this:
COND = eq{}{}
condition = ${if COND}
is nothing else than
condition = ${if eq{}{}}
but it does not add anything in the possiblities, it just maybe allows
to reuse some definitions and make code more readable.
Regards
Marten
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