Add support for hash args in the tokenizer and parser

lib/handlebars/ast.js

@@ -52,6 +52,11 @@ var Handlebars = require("handlebars");
     this.string = string;
   };
 
+  Handlebars.AST.HashNode = function(pairs) {
+    this.type = "hash";
+    this.pairs = pairs;
+  };
+
   Handlebars.AST.IdNode = function(parts) {
     this.type = "ID";
     this.original = parts.join("/");

lib/handlebars/printer.js

@@ -89,6 +89,19 @@ Handlebars.PrintVisitor.prototype.partial = function(partial) {
   return this.pad("{{> " + content + " }}");
 };
 
+Handlebars.PrintVisitor.prototype.hash = function(hash) {
+  var pairs = hash.pairs;
+  var joinedPairs = [], left, right;
+
+  for(var i=0, l=pairs.length; i<l; i++) {
+    left = pairs[i][0];
+    right = this.accept(pairs[i][1]);
+    joinedPairs.push( left + "=" + right );
+  }
+
+  return "HASH{" + joinedPairs.join(", ") + "}";
+};
+
 Handlebars.PrintVisitor.prototype.STRING = function(string) {
   return '"' + string.string + '"';
 };