[antlr-interest] BitSets and 64bit Longs

[Jeff Saremi]

THis is more for the ones who have had experience with implementing different "rumtime"s for Antlr.
I am half way through creating a runtime for Javascript however i'm stuck with the fact that i cannot do the "long" operations needed by BitSet.
I'm wondering if anyone knows the ramifications of using 32bit ops such as (bit << 31) instead of (bit << 63) and so on?
thanks
jeff

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