Maybe inconsistent result for WebIDL checker regarding "stringifier"

[janemba]

Hello,

I submit a WebIDL example for the WebIDL checker at https://w3c.github.io/webidl2.js/checker/ .

The WebIDL data is the following:

interface interface_identifier {
  stringifier;
};

And from the checker I'm getting the following result:

[
  {
    "type": "interface",
    "name": "interface_identifier",
    "inheritance": null,
    "members": [
      {
        "type": "operation",
        "name": "",
        "arguments": [],
        "extAttrs": [],
        "special": "stringifier"
      }
    ],
    "extAttrs": [],
    "partial": false
  }
]

So we have only one member but it doesn't contain the IdlType field. The Operation type describe in the README.md (from this repo), contains the IdlType.

I was wondering if the correct results should be that one instead (with IdlType set to null):

[
    {
        "type": "interface",
        "name": "interface_identifier",
        "inheritance": null,
        "members": [
            {
                "type": "operation",
                "name": "",
                "idlType": null,
                "arguments": [],
                "extAttrs": [],
                "special": "stringifier"
            }
        ],
        "extAttrs": [],
        "partial": false
    }
]

Thanks

[janemba]

According to the README.md the Operation type describe the idlType as below:

idlType: An IDL Type of what the operation returns, if exists.

So, the idlType is like the return type but if it does not exists, should the idlType be set to null or should the field be removed from the operation member (which does not make sense).