IsAnchorStart     874 third_party/re2/re2/compile.cc         if (IsAnchorStart(&sub, depth+1)) {
IsAnchorStart     889 third_party/re2/re2/compile.cc       if (IsAnchorStart(&sub, depth+1)) {
IsAnchorStart    1006 third_party/re2/re2/compile.cc   bool is_anchor_start = IsAnchorStart(&sre, 0);