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List:       antlr-interest
Subject:    [antlr-interest] Identifying a TNode
From:       nobrow () eircom ! net (Alan Larkin)
Date:       2007-02-24 15:58:40
Message-ID: 45E060B0.1020104 () eircom ! net
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b:binaryOperator
{
    TNode e1, e2;
    e1 = (TNode)b.getFirstChild();
    e2 = (TNode)e1.getNextSibling();
    expr(e1);
    print(b);
    expr(e2);
}

You see the above ... It comes from cgram (GnuCEmitter.g). I am taking this as a starting point to
implement some unusual language translation. I have a question.

Is it possible to look into each of the TNodes to see what they expand to?

In this case,

expr ::= binaryExpr | conditionalExpr | castExpr | unaryExpr | ...

I need to be able to identify the case where e1 and/or e2 turn into unaryExpr, and in such cases
avoid doing the processing I would otherwise do.

Any ideas?

Thanks.

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