1 files changed, 15 insertions, 1 deletions
diff --git a/source/blender/nodes/NOD_geometry_exec.hh b/source/blender/nodes/NOD_geometry_exec.hh
index 18de52ed6d4..d5fd3ff0abb 100644
--- a/source/blender/nodes/NOD_geometry_exec.hh
+++ b/source/blender/nodes/NOD_geometry_exec.hh
@@ -21,6 +21,7 @@
 #include "BKE_attribute_access.hh"
 #include "BKE_geometry_set.hh"
 #include "BKE_geometry_set_instances.hh"
+#include "BKE_node_ui_storage.hh"
 #include "BKE_persistent_data_handle.hh"
 
 #include "DNA_node_types.h"
@@ -28,6 +29,7 @@
 #include "NOD_derived_node_tree.hh"
 
 struct Depsgraph;
+struct ModifierData;
 
 namespace blender::nodes {
 
@@ -62,6 +64,7 @@ class GeoNodeExecParams {
   GValueMap<StringRef> &output_values_;
   const PersistentDataHandleMap &handle_map_;
   const Object *self_object_;
+  const ModifierData *modifier_;
   Depsgraph *depsgraph_;
 
  public:
@@ -70,12 +73,14 @@ class GeoNodeExecParams {
                     GValueMap<StringRef> &output_values,
                     const PersistentDataHandleMap &handle_map,
                     const Object *self_object,
+                    const ModifierData *modifier,
                     Depsgraph *depsgraph)
       : node_(node),
         input_values_(input_values),
         output_values_(output_values),
         handle_map_(handle_map),
         self_object_(self_object),
+        modifier_(modifier),
         depsgraph_(depsgraph)
   {
   }
@@ -199,8 +204,17 @@ class GeoNodeExecParams {
   }
 
   /**
+   * Add an error message displayed at the top of the node when displaying the node tree,
+   * and potentially elsewhere in Blender.
+   */
+  void error_message_add(const NodeWarningType type, std::string message) const;
+
+  /**
    * Creates a read-only attribute based on node inputs. The method automatically detects which
-   * input with the given name is available.
+   * input socket with the given name is available.
+   *
+   * \note This will add an error message if the string socket is active and
+   * the input attribute does not exist.
    */
   ReadAttributePtr get_input_attribute(const StringRef name,
                                        const GeometryComponent &component,