--          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_INFIX1

inherit CALL_INFIX;

feature

   run_feature: RUN_FEATURE;

feature {NONE}

   frozen with(t: like target; fn: like feature_name; a: like arguments;
	rf: RUN_FEATURE; ct: TYPE) is
      require
	 t /= Void;
	 fn /= Void;
	 a.count = 1;
	 rf /= Void;
	 ct /= Void
      do
	 target := t;
	 feature_name := fn;
	 arguments := a;
	 run_feature := rf;
	 run_feature_match(ct);
      ensure
	 target = t;
	 feature_name = fn;
	 arguments = a;
	 run_feature = rf
      end;

feature

   frozen result_type: TYPE is
      local
	 tla: TYPE_LIKE_ARGUMENT;
      do
	 Result := run_feature.result_type;
	 if Result.is_like_current then
	    Result := run_feature.current_type;
	 else
	    tla ?= Result;
	    if tla /= Void then
	       Result := arg1.result_type.run_type;
	    end;
	 end;
      end;

feature

   implicit_cast: BOOLEAN is
	 -- Is the current call subject to an implicit cast
	 -- from INTEGER to REAL or DOUBLE.
      deferred
      end;
   
feature {RUN_FEATURE_3,RUN_FEATURE_4}

   finalize is
      local
	 rc: RUN_CLASS;
	 rf: RUN_FEATURE;
      do
	 rf := run_feature;
	 rc := rf.current_type.run_class;
	 run_feature := rc.running.first.dynamic(rf);
      end;

feature

   frozen to_runnable(ct: TYPE): like Current is
      local
	 t: like target;
	 a: like arguments;
	 tt, at: TYPE;
	 tbee: TYPE_BASIC_EIFFEL_EXPANDED;
	 rf: RUN_FEATURE;
      do
	 t := runnable_expression(target,ct);
	 a := runnable_args(arguments,ct);
	 tt := t.result_type;
	 at := arg1.result_type;
	 if implicit_cast then
	    if at.is_real then
	       if tt.is_integer then
		  tbee ?= at.run_type;
		  !IMPLICIT_CAST!t.make(t,tbee);
	       end;
	    elseif at.is_double then
	       if tt.is_integer or else tt.is_real then
		  tbee ?= at.run_type;
		  !IMPLICIT_CAST!t.make(t,tbee);
	       end;
	    end;
	 end;
	 rf := run_feature_for(t,ct);
	 if run_feature = Void then
	    target := t;
	    arguments := a;
	    run_feature := rf;
	    run_feature_match(ct);
	    Result := Current;
	 elseif t = target and then a = arguments then
	    check
	       run_feature = rf
	    end;
	    Result := Current;
	 else
	    !!Result.with(t,feature_name,a,rf,ct);
	 end;
      end;

feature

   frozen static_value: INTEGER is
      do
	 Result := static_value_mem;
      end;

feature {NONE}
   
   static_value_mem: INTEGER;
   
   frozen call_is_static: BOOLEAN is
      local
	 rc: RUN_CLASS;
	 running: ARRAY[RUN_CLASS];
	 rf: like run_feature;
      do
	 if run_feature /= Void then
	    rc := run_feature.run_class;
	    if rc /= Void then
	       running := rc.running;
	       if running /= Void and then running.count = 1 then
		  rf := running.first.dynamic(run_feature);
		  if rf.is_static then
		     static_value_mem := rf.static_value_mem;
		     Result := true;
		  end;
	       end;
	    end;
	 end;
      end;

end -- CALL_INFIX1