[antlr-interest] AST for repeated occurrences of binary operators
Caetano Sauer
caetanosauer at gmail.com
Tue Nov 24 05:34:09 PST 2009
Hello everyone,
I am trying to generate an AST node for a logical OR operator. This would be
a parent OrExpr token with all the operands as children, for example:
a OR b OR c -> ^(OrExpr a b c)
My question is not how to do it, but I am wondering if the solution I found
is the best, since similar situations occur quite often in my grammar. Here
is the rule;
orExpr
: firstOperand=andExpr
(OR furtherOperands+=andExpr)*
-> { furtherOperands != null }? ^(OrExpr andExpr+)
-> $firstOperand
;
The important thing here is that I want it to skip straight to andExpr in
case there is no OR token.
Thank you very much and regards,
Caetano.
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