--          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.
--
deferred class CALL
   --
   -- For all sort of feature calls with result value.
   -- So it does not include procedure calls (see PROC_CALL).
   --
   -- Classification: CALL_0 when 0 argument, CALL_1 when 
   -- 1 argument and CALL_N when N arguments.
   --

inherit CALL_PROC_CALL; EXPRESSION;      

feature  
   
   is_writable: BOOLEAN is false;

   is_current: BOOLEAN is false;

   is_manifest_string: BOOLEAN is false;

   is_result: BOOLEAN is false;

   is_void: BOOLEAN is false;

   c_simple: BOOLEAN is false;
   
feature  

   frozen mapping_c_target(formal_type: TYPE) is
      local
	 flag: BOOLEAN;
	 actual_type: like result_type;
      do
	 flag := cpp.call_invariant_start(formal_type);
	 actual_type := result_type.run_type;
	 if actual_type.is_reference then
	    if formal_type.is_reference then
	       -- Reference into Reference :
	       formal_type.mapping_cast;
	       cpp.put_character('(');
	       compile_to_c;
	       cpp.put_character(')');
	    else
	       -- Reference into Expanded :
	       actual_type.to_expanded;
	       cpp.put_character('(');
	       compile_to_c;
	       cpp.put_character(')');
	    end;
	 else
	    if formal_type.is_reference then
	       -- Expanded into Reference :
	       actual_type.to_reference;
	       cpp.put_character('(');
	       compile_to_c;
	       cpp.put_character(')');
	    else
	       -- Expanded into Expanded :
	       if formal_type.need_c_struct then
		  cpp.put_character('&');
		  cpp.put_character('(');
		  compile_to_c;
		  cpp.put_character(')');
	       else
		  compile_to_c;
	       end;
	    end;
	 end;
	 if flag then
	    cpp.call_invariant_end;
	 end;
      end;

   frozen mapping_c_arg(formal_arg_type: TYPE) is
      local
	 actual_type: like result_type;
      do
	 actual_type := result_type.run_type;
	 if actual_type.is_reference then
	    if formal_arg_type.is_reference then
	       -- Reference into Reference :
	       compile_to_c;
	    else
	       -- Reference into Expanded :
	       actual_type.to_expanded;
	       cpp.put_character('(');
	       compile_to_c;
	       cpp.put_character(')');
	    end;
	 else
	    if formal_arg_type.is_reference then
	       -- Expanded into Reference :
	       actual_type.to_reference;
	       cpp.put_character('(');
	       compile_to_c;
	       cpp.put_character(')');
	    else
	       -- Expanded into Expanded :
	       if formal_arg_type.need_c_struct then
		  cpp.put_character('&');
		  cpp.put_character('(');
		  compile_to_c;
		  cpp.put_character(')');
	       else
		  compile_to_c;
	       end;
	    end;
	 end;
      end;

   frozen c_declare_for_old is
      do
	 target.c_declare_for_old;
	 if arg_count > 0 then
	    arguments.c_declare_for_old;
	 end;
      end;
   
   frozen compile_to_c_old is
      do
	 target.compile_to_c_old;
	 if arg_count > 0 then
	    arguments.compile_to_c_old;
	 end;
      end;
   
   frozen compile_to_jvm_old is
      do
	 target.compile_to_jvm_old;
	 if arg_count > 0 then
	    arguments.compile_to_jvm_old;
	 end;
      end;
   
   print_as_target is
      do
	 pretty_print;
	 fmt.put_character('.');
      end;
   
   frozen compile_target_to_jvm is
      do
	 standard_compile_target_to_jvm;
      end;

   frozen compile_to_jvm_assignment(a: ASSIGNMENT) is
      do
      end;

   frozen compile_to_jvm_into(dest: TYPE): INTEGER is
      do
	 Result := standard_compile_to_jvm_into(dest);
      end;
   
feature {CREATION_CALL,EXPRESSION_WITH_COMMENT}
      
   frozen jvm_assign is
      do
      end;

feature {NONE}

   frozen run_feature_has_result is
      do
	 if run_feature.result_type = Void then
	    eh.add_position(run_feature.start_position);
	    eh.add_position(feature_name.start_position);
	    fatal_error("Feature found is a procedure.");
	 end;
      end;

end -- CALL