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, 4 insertions, 0 deletions

diff --git a/lib/handlebars/compiler/compiler.js b/lib/handlebars/compiler/compiler.js
index 3f7aa3b..cfcc70a 100644
--- a/lib/handlebars/compiler/compiler.js
+++ b/lib/handlebars/compiler/compiler.js
@@ -74,6 +74,7 @@ Compiler.prototype = {
     this.depths = {list: []};
     this.options = options;
     this.stringParams = options.stringParams;
+    this.trackIds = options.trackIds;
 
     // These changes will propagate to the other compiler components
     var knownHelpers = this.options.knownHelpers;
@@ -395,6 +396,9 @@ Compiler.prototype = {
         this.sexpr(val);
       }
     } else {
+      if (this.trackIds) {
+        this.opcode('pushId', val.type, val.idName || val.stringModeValue);
+      }
       this.accept(val);
     }
   },