[antlr-interest] Using predicates for keywords

[Heiko Folkerts]

Hi,
I want to use an abstract syntax in wich the keyword e.g. for an if statement is available at runtime with a database call. So I don't want to hard code 'if' in the parser but use an expression for a ifkeyword which checks the database and returns wether the token is an if keyword or not.

I've tried with syntactic and semantic predicates, but even after reading the sections from the antlr reference I don't know which way is the right one for me.

The grammar would like something like this:
Statement:
Ifexpresseion
| loopexpression
;

Ifexpression: ifkeyword condition thenkeyword actionexpression;
Loopexpression: loopkeyword condition ':' actionexpression;

So how to code the ifkeyword and loopkeyword rules?

Thx in advance.
Btw.: thx to Jim for the help compiling the generated C code.

Mit freundlichem Gruß
Heiko Folkerts
Systementwicklung und -design
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