[antlr-interest] Grammars with too many keywords?

Vadim Tropashko vadimtro at yahoo.com
Thu Mar 1 09:33:29 PST 2007

The grammar that I'm working on allows keywords as
identifiers. For example, "A" is a keyword, as a part
a part of very reasonable declaration: 

  is_prefix d_o_tNOTd_o_t 'A' 'SET'

Naturally, the "A" can be identifier as well:  

         ('a'..'z'|'A'..'Z') ( 'a'..'z'|'A'..'Z'

So whenever I feed into the parser text like this:

A := ...

I'm getting 

mismatched input 'A' expecting IDENTIFIER

Is there a standard way to approach this problem?
Preferably, the solution should contain as little
redundancies as possible. For example, I could collect
all the keywords and declare them as such, but do I
really have to? Isn't grammar terminal symbol already
assumed to be a keyword?  

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