EmptyStringWalker  127 third_party/re2/re2/mimics_pcre.cc   DISALLOW_EVIL_CONSTRUCTORS(EmptyStringWalker);
EmptyStringWalker  134 third_party/re2/re2/mimics_pcre.cc bool EmptyStringWalker::PostVisit(Regexp* re, bool parent_arg, bool pre_arg,
EmptyStringWalker  181 third_party/re2/re2/mimics_pcre.cc   EmptyStringWalker w;