Toralf Lund wrote:

> What do I get if I do something like
> 
> ${eval:$some_variable+1}
> 
> when "some_variable" is not actually defined?

Looks like it treats some_variable as 0:

[EMAIL PROTECTED]:~# /usr/sbin/exim -be
 > ${eval:$acl_m9+1}
1
 >

Mike

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