Parsing error of class static function

[ezchi]

Example SystemVerilog file: factory-method-example.sv.txt

interface class Shape;
    pure virtual function void draw();
endclass

class Rectangle implements Shape;
    function void draw();
        $display("Drawing a rectangle");
    endfunction
endclass

class Circle implements Shape;
    function void draw();
        $display("Drawing a circle");
    endfunction
endclass

class ShapeFactory;
    static function Shape createShape(string shapeType);
        if (shapeType == "rectangle") begin
            Rectangle newShape = new();
            return newShape;
        end
        else if (shapeType == "circle") begin
            Circle newShape = new();
            return newShape;
        end
        else begin
            $display("Invalid shape type");
            return null;
        end
    endfunction
endclass

module top;
    Shape myShape;
    initial begin
        myShape = ShapeFactory::createShape("rectangle");
        myShape.draw();
        myShape = ShapeFactory::createShape("circle");
        myShape.draw();
        myShape = ShapeFactory::createShape("triangle");
        if (myShape != null) begin
            myShape.draw();
        end
        $finish;
    end
endmodule

Got error in treesit-explore-mode

(source_file
 (package_or_generate_item_declaration
  (interface_class_declaration interface class
   (class_identifier (simple_identifier))
   (interface_class_item ;)
   (interface_class_item
    (interface_class_method pure virtual
     (function_prototype function
      (data_type_or_void void)
      (function_identifier
       (function_identifier (simple_identifier)))
      ( ))
     ;))
   endclass))
 (package_or_generate_item_declaration
  (class_declaration class
   (class_identifier (simple_identifier))
   implements
   (interface_class_type
    (class_identifier (simple_identifier)))
   ;
   (class_item
    (class_method
     (function_declaration function
      (function_body_declaration
       (function_data_type_or_implicit1
        (data_type_or_void void))
       (function_identifier
        (function_identifier (simple_identifier)))
       ( ) ;
       (function_statement_or_null
        (function_statement
         (statement
          (statement_item
           (system_tf_call (system_tf_identifier)
            (list_of_arguments_parent (
             (expression
              (primary
               (primary_literal
                (string_literal " "))))
             )))
           ;))))
       endfunction))))
   endclass))
 (package_or_generate_item_declaration
  (class_declaration class
   (class_identifier (simple_identifier))
   implements
   (interface_class_type
    (class_identifier (simple_identifier)))
   ;
   (class_item
    (class_method
     (function_declaration function
      (function_body_declaration
       (function_data_type_or_implicit1
        (data_type_or_void void))
       (function_identifier
        (function_identifier (simple_identifier)))
       ( ) ;
       (function_statement_or_null
        (function_statement
         (statement
          (statement_item
           (system_tf_call (system_tf_identifier)
            (list_of_arguments_parent (
             (expression
              (primary
               (primary_literal
                (string_literal " "))))
             )))
           ;))))
       endfunction))))
   endclass))
 (package_or_generate_item_declaration
  (class_declaration class
   (class_identifier (simple_identifier))
   ;
   (class_item
    (class_method
     (method_qualifier
      (class_item_qualifier static))
     (function_declaration function
      (function_body_declaration
       (function_data_type_or_implicit1
        (data_type_or_void
         (data_type (simple_identifier))))
       (function_identifier
        (function_identifier (simple_identifier)))
       (
       (tf_port_list
        (tf_port_item1
         (data_type_or_implicit1
          (data_type string))
         (port_identifier (simple_identifier))))
       ) ;
       (function_statement_or_null
        (function_statement
         (statement
          (statement_item
           (conditional_statement if (
            (cond_predicate
             (expression
              (expression
               (primary (simple_identifier)))
              ==
              (expression
               (primary
                (primary_literal
                 (string_literal " "))))))
            )
            (statement_or_null
             (statement
              (statement_item
               (seq_block begin
                (block_item_declaration
                 (data_declaration
                  (data_type_or_implicit1
                   (data_type (simple_identifier)))
                  (list_of_variable_decl_assignments
                   (variable_decl_assignment (simple_identifier) =
                    (class_new new
                     (list_of_arguments_parent ( )))))
                  ;))
                (statement_or_null
                 (statement
                  (statement_item
                   (jump_statement return
                    (expression
                     (primary (simple_identifier)))
                    ;))))
                end))))
            else
            (statement_or_null
             (statement
              (statement_item
               (conditional_statement if (
                (cond_predicate
                 (expression
                  (expression
                   (primary (simple_identifier)))
                  ==
                  (expression
                   (primary
                    (primary_literal
                     (string_literal " "))))))
                )
                (statement_or_null
                 (statement
                  (statement_item
                   (seq_block begin
                    (block_item_declaration
                     (data_declaration
                      (data_type_or_implicit1
                       (data_type (simple_identifier)))
                      (list_of_variable_decl_assignments
                       (variable_decl_assignment (simple_identifier) =
                        (class_new new
                         (list_of_arguments_parent ( )))))
                      ;))
                    (statement_or_null
                     (statement
                      (statement_item
                       (jump_statement return
                        (expression
                         (primary (simple_identifier)))
                        ;))))
                    end))))
                else
                (statement_or_null
                 (statement
                  (statement_item
                   (seq_block begin
                    (statement_or_null
                     (statement
                      (statement_item
                       (system_tf_call (system_tf_identifier)
                        (list_of_arguments_parent (
                         (expression
                          (primary
                           (primary_literal
                            (string_literal " "))))
                         )))
                       ;)))
                    (statement_or_null
                     (statement
                      (statement_item
                       (jump_statement return
                        (expression
                         (primary null))
                        ;))))
                    end)))))))))))))
       endfunction))))
   endclass))
 (ERROR
  (module_header
   (module_keyword module)
   (simple_identifier))
  ;
  (module_or_generate_item
   (package_or_generate_item_declaration
    (net_declaration (simple_identifier)
     (list_of_net_decl_assignments
      (net_decl_assignment (simple_identifier)))
     ;)))
  initial begin
  (variable_lvalue (simple_identifier))
  (assignment_operator =)
  (ERROR
   (package_scope
    (package_identifier (simple_identifier))
    ::)
   (simple_identifier) ( " (simple_identifier)
   (casting_type
    (constant_primary
     (primary_literal
      (string_literal " "))))
   (simple_identifier)
   (casting_type
    (constant_primary
     (primary_literal
      (string_literal " "))))
   (simple_identifier))
  "))