Re: Nibutes from San Diego

Understood, thanks! If RE are introduced, they will be usable as 
boolean expressions (at least) in if-statement guards.

Alex.

On Sun, 29 Aug 2004, The Purple Streak, Hilarie Orman wrote:

>
> If a rule has the form
>
>  IF P THEN DO A
> (sometimes written P -> A as operational semantics)
>
> then I'll call P the lefthand side or precondition or predicate.
>
> Some examples are
>
>  if (http:response:header:set-cookie ~= "RMID=\([^;]*]" ) then
>     munge_cookie ( $1 )
>
>  if (http:content-type ~= "^text") and
>       (  set_of (http:body:img:src ) ~= "[/]images/global[/]") then
>     rewrite_images ()
>
> etc.
>
> Hilarie
>
>
>>  On Tue, 17 Aug 2004, Markus Hofmann wrote:
>
>> > Hilarie Orman expressed a preference for having P support regular
>> > expressions in the lefthand side of rules,
>
>>  Hilarie,
>
>> 	   Can you give an example or two of a regular expression in the
>>  lefthand side of rules? What is "lefthand side of rules"? Just trying
>>  to understand what the requirement is here...
>
>>  Thanks,
>
>>  Alex.
>
>