Add trackIds compiler flag

Allows helpers that care about where a particular field came from derive this data while maintaining backward compatibility with existing helpers.

1 files changed, 5 insertions, 1 deletions

diff --git a/lib/handlebars/compiler/ast.js b/lib/handlebars/compiler/ast.js
index 6789883..5a5f514 100644
--- a/lib/handlebars/compiler/ast.js
+++ b/lib/handlebars/compiler/ast.js
@@ -149,7 +149,8 @@ var AST = {
 
     var original = "",
         dig = [],
-        depth = 0;
+        depth = 0,
+        depthString = '';
 
     for(var i=0,l=parts.length; i<l; i++) {
       var part = parts[i].part;
@@ -160,6 +161,7 @@ var AST = {
           throw new Exception("Invalid path: " + original, this);
         } else if (part === "..") {
           depth++;
+          depthString += '../';
         } else {
           this.isScoped = true;
         }
@@ -172,6 +174,7 @@ var AST = {
     this.parts    = dig;
     this.string   = dig.join('.');
     this.depth    = depth;
+    this.idName   = depthString + this.string;
 
     // an ID is simple if it only has one part, and that part is not
     // `..` or `this`.
@@ -191,6 +194,7 @@ var AST = {
     this.type = "DATA";
     this.id = id;
     this.stringModeValue = id.stringModeValue;
+    this.idName = '@' + id.stringModeValue;
   },
 
   StringNode: function(string, locInfo) {