1 files changed, 26 insertions, 9 deletions

diff --git a/lib/handlebars/compiler/compiler.js b/lib/handlebars/compiler/compiler.js
index 20a558d..ca59725 100644
--- a/lib/handlebars/compiler/compiler.js
+++ b/lib/handlebars/compiler/compiler.js
@@ -210,17 +210,17 @@ Handlebars.JavaScriptCompiler = function() {};
     simpleMustache: function(mustache, program, inverse) {
       var id = mustache.id;
 
-      this.addDepth(id.depth);
-      this.opcode('getContext', id.depth);
-
-      if (id.parts.length) {
-        this.opcode('lookupOnContext', id.parts[0]);
-        for(var i=1, l=id.parts.length; i<l; i++) {
-          this.opcode('lookup', id.parts[i]);
-        }
+      if (id.type === 'DATA') {
+        this.DATA(id);
+      } else if (id.parts.length) {
+        this.ID(id);
       } else {
+        // Simplified ID for `this`
+        this.addDepth(id.depth);
+        this.opcode('getContext', id.depth);
         this.opcode('pushContext');
       }
+
       this.opcode('resolvePossibleLambda');
     },
 
@@ -247,6 +247,11 @@ Handlebars.JavaScriptCompiler = function() {};
       }
     },
 
+    DATA: function(data) {
+      this.options.data = true;
+      this.opcode('lookupData', data.id);
+    },
+
     STRING: function(string) {
       this.opcode('pushString', string.string);
     },
@@ -271,6 +276,7 @@ Handlebars.JavaScriptCompiler = function() {};
     },
 
     addDepth: function(depth) {
+      if(isNaN(depth)) { throw new Error("EWOT"); }
       if(depth === 0) { return; }
 
       if(!this.depths[depth]) {
@@ -437,7 +443,8 @@ Handlebars.JavaScriptCompiler = function() {};
       if (!this.isChild) {
         var namespace = this.namespace;
         var copies = "helpers = helpers || " + namespace + ".helpers;";
-        if(this.environment.usePartial) { copies = copies + " partials = partials || " + namespace + ".partials;"; }
+        if (this.environment.usePartial) { copies = copies + " partials = partials || " + namespace + ".partials;"; }
+        if (this.options.data) { copies = copies + " data = data || {};"; }
         out.push(copies);
       } else {
         out.push('');
@@ -646,6 +653,16 @@ Handlebars.JavaScriptCompiler = function() {};
       });
     },
 
+    // [lookupData]
+    //
+    // On stack, before: ...
+    // On stack, after: data[id], ...
+    //
+    // Push the result of looking up `id` on the current data
+    lookupData: function(id) {
+      this.pushStack(this.nameLookup('data', id, 'data'));
+    },
+
     // [pushStringParam]
     //
     // On stack, before: ...