Function ConvertLine

tensorflow/core/framework/op_gen_lib.cc:116–163

}

static bool ConvertLine(StringPiece line,
                        const std::vector<string>& multi_line_fields,
                        string* ml) {
  // Is this a field we should convert?
  if (!StartsWithFieldName(line, multi_line_fields)) {
    return false;
  }
  // Has a matching field name, so look for "..." after the colon.
  StringPiece up_to_colon;
  StringPiece after_colon = line;
  SplitAt(':', &after_colon, &up_to_colon);
  while (absl::ConsumePrefix(&after_colon, " "))
    ;  // Remove leading spaces.
  if (!absl::ConsumePrefix(&after_colon, "\"")) {
    // We only convert string fields, so don't convert this line.
    return false;
  }
  auto last_quote = after_colon.rfind('\"');
  if (last_quote == StringPiece::npos) {
    // Error: we don't see the expected matching quote, abort the conversion.
    return false;
  }
  StringPiece escaped = after_colon.substr(0, last_quote);
  StringPiece suffix = after_colon.substr(last_quote + 1);
  // We've now parsed line into '<up_to_colon>: "<escaped>"<suffix>'

  string unescaped;
  if (!absl::CUnescape(escaped, &unescaped, nullptr)) {
    // Error unescaping, abort the conversion.
    return false;
  }
  // No more errors possible at this point.

  // Find a string to mark the end that isn't in unescaped.
  string end = "END";
  for (int s = 0; unescaped.find(end) != string::npos; ++s) {
    end = strings::StrCat("END", s);
  }

  // Actually start writing the converted output.
  strings::StrAppend(ml, up_to_colon, ": <<", end, "\n", unescaped, "\n", end);
  if (!suffix.empty()) {
    // Output suffix, in case there was a trailing comment in the source.
    strings::StrAppend(ml, suffix);
  }
  strings::StrAppend(ml, "\n");
  return true;
}

string PBTxtToMultiline(StringPiece pbtxt,
                        const std::vector<string>& multi_line_fields) {