Interpret any ANTLR grammar:
java Interp file.g tokens-to-ignore start-rule input-file
java Interp C.g 'WS COMMENT' program t.c
where the WS and COMMENT are the names of tokens you want to have
the parser ignore.
A set of integers that relies on ranges being common to do
"run-length-encoded" like compression (if you view an IntSet like
a BitSet with runs of 0s and 1s).
A generic set of ints that has an efficient implementation, BitSet,
which is a compressed bitset and is useful for ints that
are small, for example less than 500 or so, and w/o many ranges.
INVALID -
Static variable in class org.antlr.analysis.Label
Is the DFA reduced? I.e., does every state have a path to an accept
state? If not, don't delete as we need to generate an error indicating
which paths are "dead ends".