[
 (program) {
  (stmt_list) {
   (stmt_or_defined_macro) {
    (namespace) {
     (namespace_definition_start) {
      namespace
      A
     }
     (namespace_body) {
      {
      (stmt_list) {
       (stmt_or_defined_macro) {
        (class_or_union_or_struct) {
         (identified_type_meta_specifier_with_template_def) {
          class
          B
         }
         ;
        }
       }
      }
      }
     }
    }
   }
  }
 }
]