1 files changed, 13 insertions, 0 deletions
diff --git a/source/blender/blenlib/BLI_listbase_wrapper.h b/source/blender/blenlib/BLI_listbase_wrapper.h
index 34197fe9c45..d6832166e35 100644
--- a/source/blender/blenlib/BLI_listbase_wrapper.h
+++ b/source/blender/blenlib/BLI_listbase_wrapper.h
@@ -93,6 +93,19 @@ template<typename T> class IntrusiveListBaseWrapper {
     BLI_assert(ptr);
     return (T *)ptr;
   }
+
+  uint index_of(const T *value) const
+  {
+    uint index = 0;
+    for (T *ptr : *this) {
+      if (ptr == value) {
+        return index;
+      }
+      index++;
+    }
+    BLI_assert(false);
+    return 0;
+  }
 };
 
 } /* namespace BLI */