Function foreach

src/master/http.cpp:823–832

  RepeatedPtrField<Resource> volumes;
  foreach (const JSON::Value& value, parse->values) {
    Try<Resource> volume = ::protobuf::parse<Resource>(value);
    if (volume.isError()) {
      return BadRequest(
          "Error in parsing 'volumes' query parameter in the request body: " +
          volume.error());
    }

    volumes.Add()->CopyFrom(volume.get());
  }

  return _createVolumes(slaveId, volumes, principal);
}