Function StrCat

tensorflow/tools/proto_text/gen_proto_text_functions_lib.cc:37–41

template <typename... Args>
string StrCat(const Args&... args) {
  std::ostringstream s;
  std::vector<int>{((s << args), 0)...};
  return s.str();
}

template <typename... Args>
string StrAppend(string* to_append, const Args&... args) {