Re: [Gems-users] Using Ruby parameters on SLICC code?

["Liqun Cheng" <liqun.cheng@xxxxxxxxx>]

Enrique,

I believe your problem is in slicc parser. I had the same problem before, and here is Mike's reply.

Liqun

/**************************************************
I always make an accessor function and define this in RubySlicc_Util.sm 
and RubySlicc_Util.h

Its probably possible to extend SLICC to do this automagically if you 
wanted.

--Mike
*****************************************************/

On 3/6/07, Enrique Vallejo Gutierrez <enrique@xxxxxxxxxxxxx> wrote:

Dear list,

        I was wondering if it is possible to customize the protocol
behaviour depending on the values of Ruby parameters. This is, for example,
to define an action that would be different depending on the parameter that
was specified at execution time:

If (RubyParameter1){
        Do action a
}else{
        Take a different action
}

Obviously, this is simple to implement with two different SLICC protocols,
but I would like to know if it can be implemented in a single one, to
simplify and use parameters at execution time, and to avoid defining and
modifying the same file multiple times with minor changes.

I have tried, with no success, to use the Protocol options (like
TwoLevelCache or XactMemory) or RubyConfig options, but they are not
recognized when the slicc code is parsed. I have seen that parameters can be
used, quoted, to determine queues latencies, but this is a special case
which is considered in slicc\ast\EnqueueStatementAST.C. The only solution
that comes to my mind is to use methods in a given class defined outside
SLICC (such as TransactionManager) that directly return the value of the
given parameter (xact_mgr.getRubyParameter1(), etc), but that looks very
ugly.

Has somebody some experience on this? I haven't found any information on
previous messages on the list.

Thank you in advance,

Enrique Vallejo <http://www.atc.unican.es/~enrique/>
University of Cantabria, Spain

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