Function IsJobName

tensorflow/core/util/device_name_utils.cc:32–39

Returns true iff "in" is a valid job name.

// Returns true iff "in" is a valid job name.
static bool IsJobName(StringPiece in) {
  if (in.empty()) return false;
  if (!IsAlpha(in[0])) return false;
  for (size_t i = 1; i < in.size(); ++i) {
    if (!(IsAlphaNum(in[i]) || in[i] == '_')) return false;
  }
  return true;
}

// Returns true and fills in "*job" iff "*in" starts with a job name.
static bool ConsumeJobName(StringPiece* in, string* job) {