(E)BNF Grammar to XML for LALR(1) parse table?

I have created a grammar for a little calculator language my company
created (literally takes constants, variables, parenthesis, and basic
arithmetic). We work exclusively in C# and I am having a difficult
time finding tools to generate a business-class, maintainable lexer
and parser. I have evaluated:


* Gold [http://devincook.com/goldparser/]
* C#Cup [http://www.infosys.tuwien.ac.at/cuplex/cup.htm]
* And GPLEX/GPPG [http://www.plas.fit.qut.edu.au/gppg/]


My requirements are:


* Efficiency is paramount as this will be iterated over many times.
* The code must be readable/maintainable.


GPLEX/GPPG was probably the best one, but it still fell short of my
expectations.


I figured the most expeditious route to get a working parser would be
to write my own, but I am not having fun manually generating the parse
tables. In this light, are there any tools which will examine a
grammar and spit out the parse table in XML so I can generate code
based on that?


Any magic bullet parser generators welcome as well :)
[If it really is just an expression language, an operator precedence parser,
which is easy to hand-code, should be all you need. -John]

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