--          This file is part of SmallEiffel The GNU Eiffel Compiler.
--          Copyright (C) 1994-98 LORIA - UHP - CRIN - INRIA - FRANCE
--            Dominique COLNET and Suzanne COLLIN - colnet@loria.fr 
--                       http://www.loria.fr/SmallEiffel
-- SmallEiffel is  free  software;  you can  redistribute it and/or modify it 
-- under the terms of the GNU General Public License as published by the Free
-- Software  Foundation;  either  version  2, or (at your option)  any  later 
-- version. SmallEiffel is distributed in the hope that it will be useful,but
-- WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
-- or  FITNESS FOR A PARTICULAR PURPOSE.   See the GNU General Public License 
-- for  more  details.  You  should  have  received a copy of the GNU General 
-- Public  License  along  with  SmallEiffel;  see the file COPYING.  If not,
-- write to the  Free Software Foundation, Inc., 59 Temple Place - Suite 330,
-- Boston, MA 02111-1307, USA.
--
class TYPE_NONE
   --   
   -- For declaration of type NONE.
   --
   
inherit TYPE;
   
creation make
   
feature 
   
   base_class_name: CLASS_NAME;
   
feature 
   
   make(sp: like start_position) is
      do
	 !!base_class_name.make(us_none,sp);
      end;

feature
   
   id: INTEGER is -1;
   
   is_expanded: BOOLEAN is false;
   
   is_basic_eiffel_expanded: BOOLEAN is false;

   is_reference: BOOLEAN is true;
   
   is_none: BOOLEAN is true;
   
   is_dummy_expanded: BOOLEAN is false;

   is_user_expanded: BOOLEAN is false;

   is_generic: BOOLEAN is false;

   is_array: BOOLEAN is false;

   is_any: BOOLEAN is false;

   is_like_current: BOOLEAN is false;

   is_like_argument: BOOLEAN is false;

   is_like_feature: BOOLEAN is false;

   jvm_method_flags: INTEGER is 17;

feature

   run_class: RUN_CLASS is
      do
      end;
   
   generic_list: ARRAY[TYPE] is
      do
	 fatal_error_generic_list;
      end;

   expanded_initializer: RUN_FEATURE_3 is
      do
      end;

   c_header_pass1 is
      do
      end;

   c_header_pass2 is
      do
      end;

   c_header_pass3 is
      do
      end;

   c_header_pass4 is
      do
      end;

   c_type_for_argument_in(str: STRING) is
      do 
	 str.append(fz_t0_star);
      end;

   c_type_for_target_in(str: STRING) is
      do
	 str.append(fz_t0_star);
      end;

   c_type_for_result_in(str: STRING) is
      do
	 str.append(fz_t0_star);
      end;

   c_initialize is
      do
	 cpp.put_string(fz_null);
      end;

   c_initialize_in(str: STRING) is
      do
	 str.append(fz_null);
      end;

   space_for_variable, space_for_object: INTEGER is
      do
	 Result := space_for_pointer;
      end;

   need_c_struct: BOOLEAN is false;

   has_creation(fn: FEATURE_NAME): BOOLEAN is
      do
	 eh.add_position(fn.start_position);
	 error(start_position,"No creation for NONE.");
      end;
   
   is_run_type: BOOLEAN is true;
   
   start_position: POSITION is
      do
	 Result := base_class_name.start_position;
      end;
   
   to_runnable(rt: TYPE): like Current is
      do
	 Result := Current;
      end;
   
   written_mark, run_time_mark: STRING is
      do
	 Result := us_none;
      end;
   
   smallest_ancestor(other: TYPE): TYPE is
      do
	 Result := other;
      end;
   
   is_a(other: TYPE): BOOLEAN is
      do
	 Result := true;
      end;
   
   run_type: TYPE is
      do
	 Result := Current;
      end;

   used_as_reference is
      do
      end;

   to_reference is
      do
      end;

   jvm_descriptor_in(str: STRING) is
      do
	 str.append(jvm_root_descriptor);
      end;

   jvm_target_descriptor_in(str: STRING) is
      do
      end;

   jvm_return_code is
      do
	 code_attribute.opcode_areturn;
      end;

   jvm_push_local(offset: INTEGER) is
      do
	 code_attribute.opcode_aload(offset);
      end;

   jvm_check_class_invariant is
      do
      end;

   jvm_push_default: INTEGER is
      do
	 code_attribute.opcode_aconst_null;
	 Result := 1;
      end;

   jvm_initialize_local(offset: INTEGER) is
      do
	 code_attribute.opcode_aconst_null;
	 jvm_write_local(offset);
      end;

   jvm_write_local(offset: INTEGER) is
      do
	 code_attribute.opcode_astore(offset);
      end;

   jvm_xnewarray is
      local
	 idx: INTEGER;
      do
	 idx := constant_pool.idx_jvm_root_class;
	 code_attribute.opcode_anewarray(idx);
      end;

   jvm_xastore is
      do
	 code_attribute.opcode_aastore;
      end;

   jvm_xaload is
      do
	 code_attribute.opcode_aaload;
      end;

   jvm_if_x_eq: INTEGER is
      do
	 Result := code_attribute.opcode_if_acmpeq;
      end;

   jvm_if_x_ne: INTEGER is
      do
	 Result := code_attribute.opcode_if_acmpne;
      end;

   jvm_to_reference is
      do
      end;

   jvm_expanded_from_reference(other: TYPE): INTEGER is
      do
	 check
	    false
	 end;
      end;

   jvm_convert_to(destination: TYPE): INTEGER is
      do
	 Result := 1;
      end;

   jvm_standard_is_equal is
      do
      end;

feature {RUN_CLASS,TYPE}

   need_gc_mark_function: BOOLEAN is false;

   just_before_gc_mark_in(str: STRING) is
      do
      end;

   gc_info_in(str: STRING) is
      do
      end;

   gc_define1 is
      do
      end;

   gc_define2 is
      do
      end;

feature {TYPE}

   short_hook is
      do
	 short_print.a_class_name(base_class_name);
      end;

end -- TYPE_NONE