Added default constructor if no C version exists

src/clang_convert/default/default_ccode_converter.py

@@ -38,6 +38,8 @@ class DefaultCCodeConverter:
         # Post-processing
         self.run_post_processing()
 
+        self.validate_code_elements()
+
         return cppcode.CppCode(self._code_info, self._code_elements)
 
     # ============================== Setup functions: start ==============================
@@ -160,6 +162,9 @@ class DefaultCCodeConverter:
 
     # ============================== Post-processing: end   ==============================
 
+    # Override for any final validation of the new cppcode object
+    def validate_code_elements(self):
+        pass
 
     # Helper for consistent debug output!
     def dump_function(self, def_name, cppfunc):

src/clang_convert/grib_accessor/grib_accessor_ccode_converter.py

@@ -22,7 +22,8 @@ import grib_accessor.supporting.data_member_mappings as data_member_mappings
 import grib_accessor.grib_accessor_conversion_pack.grib_accessor_type_info as grib_accessor_type_info
 import grib_accessor.grib_accessor_conversion_pack.grib_accessor_container_utils as grib_accessor_container_utils
 import code_object_converter.conversion_pack.arg_utils as arg_utils
-
+import code_object.compound_statement as compound_statement
+import code_object.constructor_function as constructor_function
 
 prefix = "grib_accessor_class_"
 rename = {
@@ -165,3 +166,18 @@ class GribAccessorCCodeConverter(default_ccode_converter.DefaultCCodeConverter):
                 
                 if mismatch_found:
                     break
+
+    def validate_code_elements(self):
+        if not self._code_elements.constructor:
+            # We need to create a default constructor to ensure the InitData is passed up the construction hierarchy correctly!
+            cppconstructor_funcsig = self._conversion_pack.conversion_data.cppfuncsig_for_cfuncname("init")
+            assert cppconstructor_funcsig
+            cppconstructor_body = compound_statement.CompoundStatement()
+            cppconstructor = constructor_function.ConstructorFunction(cppconstructor_funcsig, 
+                                                                      cppconstructor_body,
+                                                                      self._conversion_pack.conversion_data.info.class_name,
+                                                                      self._conversion_pack.conversion_data.info.super_class_name)
+            debug.line("validate_cppcode", f"No constructor found, adding a default=[{debug.as_debug_string(cppconstructor)}]")
+            self._code_elements.add_constructor(cppconstructor)
+
+        super().validate_code_elements()