Fix a number of outstanding issues:

* {{}} escape their contents, {{{}}} and {{& }} do not
* Add support in the parser, tokenizer and AST for partials
  with context (support is still not there in the runtime)
* Fix some inconsistencies with the old behavior involving
  the correct printing of null and undefined
* Add Handlebars.Exception
* Fixed an issue involving ./foo and this/foo
* Fleshed out helperMissing in the specs (this will be
  moved out into handlebars proper once registerHelper
  and registerPartial are added)

1 files changed, 54 insertions, 0 deletions

diff --git a/lib/handlebars/utils.js b/lib/handlebars/utils.js
new file mode 100644
index 0000000..a166598
--- /dev/null
+++ b/lib/handlebars/utils.js
@@ -0,0 +1,54 @@
+if(exports) {
+  var Handlebars = {};
+}
+
+Handlebars.Exception = function(message) {
+  this.message = message;
+};
+
+// Build out our basic SafeString type
+Handlebars.SafeString = function(string) {
+  this.string = string;
+}
+Handlebars.SafeString.prototype.toString = function() {
+  return this.string.toString();
+}
+
+Handlebars.Utils = {
+  escapeExpression: function(string) {
+    // don't escape SafeStrings, since they're already safe
+    if (string instanceof Handlebars.SafeString) {
+      return string.toString();
+    }
+    else if (string === null) {
+      string = "";
+    }
+
+    return string.toString().replace(/&(?!\w+;)|["\\<>]/g, function(str) {
+      switch(str) {
+        case "&":
+          return "&amp;";
+          break;
+        case '"':
+          return "\"";
+        case "\\":
+          return "\\\\";
+          break;
+        case "<":
+          return "&lt;";
+          break;
+        case ">":
+          return "&gt;";
+          break;
+        default:
+          return str;
+      }
+    });
+  }
+}
+
+if(exports) {
+  exports.Utils = Handlebars.Utils;
+  exports.SafeString = Handlebars.SafeString;
+  exports.Exception = Handlebars.Exception;
+}