[antlr-interest] DFA argument "s"

[Avid Trober]

What determines the value of the "s" argument to a DFA routine such as this?

protected internal int DFA21_SpecialStateTransition(DFA dfa, int s, IIntStream _input) 

The DFA is called via this in the parser:

alt21 = dfa21.Predict(input);

then, goes through some ANTLR call frames before emerging in the above DFA call with "s" set to some value.  (That value is braching to the wrong case statement that I would expect, but can't figure out why).

Thanks in advance.
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