AddCharClass      561 third_party/re2/re2/parse.cc             r3->ccb_->AddCharClass(r1->ccb_);
AddCharClass     1464 third_party/re2/re2/parse.cc       cc->AddCharClass(&ccb1);
AddCharClass      593 third_party/re2/re2/regexp.h   void AddCharClass(CharClassBuilder* cc);