[Grammatica-users] Reusing the Parser and Tokenizer classes

[Luc Morin]

Hello,

I'm using Grammatica in one of my ongoing C# projects, and I'm seeing a 
possible performance issue.

Right now, whenever I need to parse a string and return the "analyzed" result, 
I need to instantiate a new Parser like so (this snippet is taken from my own 
analyzer derived class):


public string GetProperty(String input, int obj) 
{
        string propvalue;

        h_object = obj;
        Parser  parser = new LucParser(new StringReader(input), this);
        parser.Parse();
        
        // call the Eplan 21 API getProperty function to retrieve the actual 
value
        propvalue = getProperty(h_object, propnum, index);
        return propvalue;
}

I'm making a lot of calls to this function, and each time the Parser has to be 
re-initialized, calling its CreatePatterns() function. The Tokenizer also calls 
its own CreatePatterns() function each time. I see this as a performance issue.

Would it be possible to reuse the Parser and Tokenizer classes such that they 
get instantiated only once, and then be able to parse() strings without having 
to re-init ?

This would imply modifying the code templates I guess. Would it involve a lot 
of work from the developers of Grammatica ?

Or maybe this feature is already in there and I just haven't seen it ?

Best regards.


Luc Morin
 
Electrical Designer
Wulftec / M.J. Maillis Group
Ph.: (819) 838-4232 ext. 232
Fx.: (819) 838-5539
 
www.wulftec.com
www.maillis.gr
 
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