Method SimplifyCharClass

extern/re2/re2/simplify.cc:653–663

Simplifies a character class. Caller must Decref return value when done with it.

// Simplifies a character class.
// Caller must Decref return value when done with it.
Regexp* SimplifyWalker::SimplifyCharClass(Regexp* re) {
  CharClass* cc = re->cc();

  // Special cases
  if (cc->empty())
    return new Regexp(kRegexpNoMatch, re->parse_flags());
  if (cc->full())
    return new Regexp(kRegexpAnyChar, re->parse_flags());

  return re->Incref();
}

}  // namespace re2