         ,
           {
             commands: [
-              ['==',['get',['$reserved','this'],'x'],100]
+              ['==',['get',['&'],'x'],100]
             ]
           }
     parse """

        ,
          {
            commands: [
              ['==',['get','right'],['get',['$reserved','window'],'width']]
            ]
          }
    parse """

                    [
                      "$combinator",
                      [
                        "&"
                      ],
                      " "
                    ]
                    "post"
                  ],
                  [
                    "::scope"
                  ],
                  [
                    "$virtual",
                    [
                      "$combinator",
                      [
                        "&"
                      ],
                      " "
                    ],
