- [v1.3.0-beta.3](#v130-beta3)
  - [Downloads](#downloads-10)
  - [Changelog since v1.3.0-beta.2](#changelog-since-v130-beta2)
    - [Action Required](#action-required)
    - [Other notable changes](#other-notable-changes-10)
- [v1.3.0-beta.2](#v130-beta2)
  - [Downloads](#downloads-11)
  - [Changes since v1.3.0-beta.1](#changes-since-v130-beta1)
    - [Experimental Features](#experimental-features)

// check the data type.
typedef std::pair<string, DataType> IOSpec;

const char* kFeedStackToString = "File \"feed.cc\", line 10, in alpha";
const char* kNegStackToString = "File \"neg.cc\", line 15, in beta";

std::vector<IOSpec> M(const std::initializer_list<string>& names) {
  std::vector<IOSpec> v;
  for (const string& name : names) {
    v.push_back(IOSpec(name, DT_INVALID));
  }
  return v;
}