Allow using unions and structs in the native structure definition.

Author: bruvzg

binding_generator.py

@@ -1524,7 +1524,7 @@ def generate_engine_classes_bindings(api, output_dir, use_template_get_node):
         expanded_format = native_struct["format"].replace("(", " ").replace(")", ";").replace(",", ";")
         for field in expanded_format.split(";"):
             field_type = field.strip().split(" ")[0].split("::")[0]
-            if field_type != "" and not is_included_type(field_type) and not is_pod_type(field_type):
+            if field_type != "" and field_type != "{" and field_type != "}" and field_type != "union" and field_type != "struct" and not is_included_type(field_type) and not is_pod_type(field_type):
                 if field_type not in used_classes:
                     used_classes.append(field_type)
 
@@ -1548,9 +1548,18 @@ def generate_engine_classes_bindings(api, output_dir, use_template_get_node):
         result.append("")
 
         result.append(f"struct {struct_name} {{")
+        indent = 1
         for field in native_struct["format"].split(";"):
             if field != "":
-                result.append(f"\t{field};")
+                if "}" in field:
+                    indent -= 1
+                if "{" in field:
+                    parts = field.split("{")
+                    result.append(f"{'\t' * indent}{parts[0]}{{")
+                    indent += 1
+                    result.append(f"{'\t' * indent}{parts[1]};")
+                else:
+                    result.append(f"{'\t' * indent}{field};")
         result.append("};")
 
         result.append("")