Method Decref

extern/re2/re2/nfa.cc:181–189

}

void NFA::Decref(Thread* t) {
  DCHECK(t != NULL);
  t->ref--;
  if (t->ref > 0)
    return;
  DCHECK_EQ(t->ref, 0);
  t->next = freelist_;
  freelist_ = t;
}

// Follows all empty arrows from id0 and enqueues all the states reached.
// Enqueues only the ByteRange instructions that match byte c.