not able to parse anchor variable reference

[KrishnaveniSan]

Hi,

I m trying to parse a swagger.yaml with js-yaml. I have defined anchor variables and referenced them as below.

x-a127-config:
  abc: &ABC 
  xyz: &xyz 


x-a127-services:
  abc: *abc
  **cache-session: *xyz**

The parser throws exception at line *cache-session: xyz

error: unidentified alias "xyz" at line 28, column 22:
cache-session: *xyz
^

Below is my code

var yaml = require('js-yaml');
var doc;
    try {
      doc = yaml.load(stream.readFileSync(inputFilePath, 'utf8')); //inputFilePath -- is path to my swagger.yaml file
       } catch (e) {
      console.log(e);
    } 

Is there any option that can be used while parsing, so that js-yaml will parse the references to anchor variables successfully?

[dervus]

JS-YAML registers anchors only for non-empty nodes. I'll check if it conforms the spec or not.

[stealthybox]

This may be related to #319.

[perlpunk]

You can add an anchor to any node, the spec doesn't say anything special about empty nodes.
For this input:

a: &a
b: *a

I currently get this JSON output:

{
  "a": null,
  "b": []
}

where b should actually have the value null.

[perlpunk]

I added a test for this: https://github.com/yaml/yaml-test-suite/blob/master/test/6KGN.tml

[rlidwka]

Fixed in e8cf6f6 (currently in dev branch).