Add optimized compiled version of handlebars, which should be significantly faster. Use Handlebars.VM.compile instead of Handlebars.compile to use the optimized version.

Major TODOS:

* clean up a bunch of code duplication in the compiler
* reorganize the compiler
* add support for debug symbols which would make it possible
  to provide information about what part of the source caused
  a runtime error.

1 files changed, 17 insertions, 6 deletions

diff --git a/lib/handlebars/compiler.js b/lib/handlebars/compiler.js
index 33e1fdf..96ae36a 100644
--- a/lib/handlebars/compiler.js
+++ b/lib/handlebars/compiler.js
@@ -1,7 +1,7 @@
 var handlebars = require("handlebars/parser").parser;
 
 // BEGIN(BROWSER)
-Handlebars = {};
+var Handlebars = {};
 
 Handlebars.Parser = handlebars;
 
@@ -48,16 +48,27 @@ Handlebars.registerPartial = function(name, str) {
   this.partials[name] = str;
 };
 
-Handlebars.registerHelper('blockHelperMissing', function(context, fn) {
+Handlebars.registerHelper('blockHelperMissing', function(context, fn, inverse) {
+  inverse = inverse || function() {};
+
   var ret = "";
+  var type = Object.prototype.toString.call(context);
+
+  if(type === "[object Function]") {
+    context = context();
+  }
 
   if(context === true) {
     return fn(this);
   } else if(context === false || context == null) {
-    return "";
-  } else if(Object.prototype.toString.call(context) === "[object Array]") {
-    for(var i=0, j=context.length; i<j; i++) {
-      ret = ret + fn(context[i]);
+    return inverse(this);
+  } else if(type === "[object Array]") {
+    if(context.length > 0) {
+      for(var i=0, j=context.length; i<j; i++) {
+        ret = ret + fn(context[i]);
+      }
+    } else {
+      ret = inverse(this);
     }
     return ret;
   } else {