add utility to check if an input is only a single value

1 files changed, 12 insertions, 0 deletions

diff --git a/source/blender/functions/FN_generic_virtual_list_list_ref.h b/source/blender/functions/FN_generic_virtual_list_list_ref.h
index 7a309780bb7..9ccaef6b019 100644
--- a/source/blender/functions/FN_generic_virtual_list_list_ref.h
+++ b/source/blender/functions/FN_generic_virtual_list_list_ref.h
@@ -81,6 +81,18 @@ class GenericVirtualListListRef {
     return *m_type;
   }
 
+  bool is_single_list() const
+  {
+    switch (m_category) {
+      case Category::SingleArray:
+        return true;
+      case Category::FullArrayList:
+        return m_virtual_list_size == 1;
+    }
+    BLI_assert(false);
+    return false;
+  }
+
   GenericVirtualListRef operator[](uint index) const
   {
     BLI_assert(index < m_virtual_list_size);