Method Concat2

extern/re2/re2/simplify.cc:573–581

Creates a concatenation of two Regexp, consuming refs to re1 and re2. Returns a new Regexp, handing the ref to the caller.

// Creates a concatenation of two Regexp, consuming refs to re1 and re2.
// Returns a new Regexp, handing the ref to the caller.
Regexp* SimplifyWalker::Concat2(Regexp* re1, Regexp* re2,
                                Regexp::ParseFlags parse_flags) {
  Regexp* re = new Regexp(kRegexpConcat, parse_flags);
  re->AllocSub(2);
  Regexp** subs = re->sub();
  subs[0] = re1;
  subs[1] = re2;
  return re;
}

// Simplifies the expression re{min,max} in terms of *, +, and ?.
// Returns a new regexp.  Does not edit re.  Does not consume reference to re.