On Fri, Jun 17, 2011 at 05:25:44AM -0400, Bas van der Vlies wrote:
>I want to define a classs like this:
> classes:
> "PBS_MOM" and => { !classify("gb-r7n1.irc.sara.nl"), regcmp(
>".*r[0-9]+n[0-9].*", "$(sys.host)" ) };
>
>This is not a valid syntax. Is it possible to set a class and use the 'not'
>operator? For me it would be useful or are there other ways to accomplish this?
>
>PS) I used this syntax a lot in cf2 to define classes.
I had to do something similar, and I think that I wound up breaking it
into what I consider "interstitial classes" (i.e. classes that aren't
used for anything other than constructing other classes, in order to get
around syntax limitations).
In your example, I think that this would achive what you want (untested):
classes:
'PBS_dom' expression => classify("gb-r7n1.irc.sara.nl");
'PBS_reg' expression => regcmp(".*r[0-9]+n[0-9].*");
'PBS_MOM' expression => "!PBS_dom.PBS_reg.${sys.host}"
Of course, the ability to nest the various and{}, or{}, not{}, xor{}
expressions would be nice.
Alternately, implement a "not()" function, independent of the "not{}"
classes construct.
--
Jesse Becker
NHGRI Linux support (Digicon Contractor)
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