Function tmToString

bolt/type/tests/TimestampTest.cpp:445–464

}

std::string tmToString(
    const std::tm& tmValue,
    uint64_t nanos,
    const std::string& format,
    const TimestampToStringOptions& options) {
  auto width = static_cast<int>(options.precision);
  auto value =
      options.precision == TimestampToStringOptions::Precision::kMilliseconds
      ? nanos / 1'000'000
      : nanos;

  std::ostringstream oss;
  oss << std::put_time(&tmValue, format.c_str());

  if (options.mode != TimestampToStringOptions::Mode::kDateOnly) {
    oss << '.' << std::setfill('0') << std::setw(width) << value;
  }

  return oss.str();
}

TEST(TimestampTest, epochToUtc) {
  std::tm tm{};