Additional MakeNode _templateHandlers

gistfile1.js

Y.MakeNode.prototype._templateHandlers["@@"] = function (args) {
    args = this._parseMakeNodeArgs(args);
    if (args.length !== 2 || args[0] === "" || args[1] === "") {
        return;
    }   
    var av = this.get(args[0]);
    if (! av) {
        return;
    }   
    return av.get(args[1]);
};  

Y.MakeNode.prototype._templateHandlers["@p"] = function (args) {
    args = this._parseMakeNodeArgs(args);
    if (args.length !== 2 || args[0] === "" || args[1] === "") {
        return;
    }   
    var av = this.get(args[0]);
    if (! av) {
        return;
    }   
    return av[args[1]];
};  

Y.MakeNode.prototype._templateHandlers["p@"] = function (args) {
    args = this._parseMakeNodeArgs(args);
    if (args.length !== 2 || args[0] === "" || args[1] === "") {
        return;
    }   
    var pv = this[args[0]];
    if (! pv) {
        return;
    }   
    return pv.get(args[1]);
};  

You don't actually need to call _parsemakeNodeArgs for this one. Just splitting args on whitespace should do. The parser is useful when you want to allow for strings containing whitespace but, presumably, the arguments here would be proper identifiers and do not need to be quoted.

Y.MakeNode.prototype._templateHandlers["p@"] = function (args) {
    args = args.split(' ');
    var value = this[args[0]];
    if (value) {
          return value.get(args[1]);
   }
};  

this allows you to call it like this: {p@ prop att} instead of {p@ "prop" "att"}, which is easier, unless you have identifiers that need quoting.