Function IsLetterNumberOrUnderline

oneflow/core/common/error_util.cpp:34–36

}

bool IsLetterNumberOrUnderline(char c) {
  return (c >= '0' && c <= '9') || (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z') || (c == '_');
}

Maybe<std::string> ShortenMsg(std::string str) {
  // 150 characters is the threshold