Parsing a mathematical expression. Looking for an describing algebra (recursive)

Hello,


More than 10 years ago I wrote a program for my first year computing
science in university called expressions. This is a simple parser for
simple mathematical expressions. The most important was to have a good
algebra to start from. Our's looked like this:


expression : term + term; term - term; term .
term : factor * factor; factor / factor; factor.
factor : sign factor
                    ; (expression)
                    ; ident
                    ; constant.
sign : + ; -




I want to expand this to include matrices,functions and user defined
functions. Does anyone here have such an algebra lying around ? Could
you mail it to me ? Or can you point me where I can find one ?


Thanks !


Henk Linde




Greetings from the Netherlands,


Henk Linde
hlinde@euronet.nl
Henk.Linde@inter.nl.net
[Sounds like Matlab. -John]
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