Is di.key.Key code right ?

[vicb]

  factory Key(Type type, [Type annotation]) {
    var _hashCode = type.hashCode + annotation.hashCode;
    var _id = _hashToKey.putIfAbsent(_hashCode, () => _lastKeyId++);
    return new Key._newKey(type, annotation, _hashCode, _id);
  }

  Key._newKey(this.type, this.annotation, this.hashCode, this.id);

  bool operator ==(other) =>
      other is Key && other.hashCode == hashCode;

Is this code right ?

I think Key(A, B) == Key (B, A) is wrong.

Two objects that are equal have the same hash code but two objects with the same hash code are not necessary equal (however this is assumed by the current code)

[pavelgj]

@vicb Good catch. Fix PR: #96

[pavelgj]

Fixed via f673267