[antlr-interest] ANTLR 3: Problem with static DFA class generation

[Oliver Zeigermann]

2005/9/10, Terence Parr <parrt at cs.usfca.edu>:
> No matter what, if you have a ref to a parameter in a predicate that
> will end up in a cyclic DFA, it will not be visible!  There is
> absolutely no way around this.  You can generate an arbitrary DFA in
> java code without using ptrs to objects.  Many people have try to
> show me some try-finally stuff that will do arbitrary gotos but I
> always show a backwards jump that isn't possible.

Maybe I am missing something obvious, but why not making the inner
classes non-static? This way you have the implied this pointer and can
simply access the fields of the enclosing class.

This actually worked for me!!!

Turning something like

        alt10 = DFA10.predict(input);
to
        alt10 = new DFA10().predict(input);

and

        public static int predict(IntStream input) throws RecognitionException {
to
        public int predict(IntStream input) throws RecognitionException {

and

        static DFA.State s17 = new DFA.State() {{alt=2;}};
to
        DFA.State s17 = new DFA.State() {{alt=2;}};

and finally

    static class DFA10 extends DFA {
to
    class DFA10 extends DFA {


Not very elegant, but seems to work. Anything I am missing?

Thanks and cheers

Oliver