--          This file is part of SmartEiffel The GNU Eiffel Compiler.
--       Copyright (C) 1994-2002 LORIA - INRIA - U.H.P. Nancy 1 - FRANCE
--          Dominique COLNET and Suzanne COLLIN - SmartEiffel@loria.fr
--                       http://SmartEiffel.loria.fr
-- SmartEiffel 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. SmartEiffel 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  SmartEiffel;  see the file COPYING.  If not,
-- write to the  Free Software Foundation, Inc., 59 Temple Place - Suite 330,
-- Boston, MA 02111-1307, USA.
--
class PRECURSOR_INSTRUCTION
   --
   -- Handling of the `Precursor' procedure call.
   --

inherit PRECURSOR_CALL; INSTRUCTION

creation make

feature

   end_mark_comment: BOOLEAN is false

   is_pre_computable: BOOLEAN is false

   collect_c_tmp is
      do
         if arguments /= Void then
            arguments.collect_c_tmp
         end
      end

   to_runnable(ct: E_TYPE): like Current is
      local
         wrf: RUN_FEATURE; super: EFFECTIVE_ROUTINE; pn: FEATURE_NAME
      do
         if current_type = Void then
            current_type := ct
            Result := Current
            wrf := smart_eiffel.top_rf
            if wrf.result_type /= Void then
               error_handler.add_position(start_position)
               fatal_error("Inside a function, a Precursor call must %
                           %be a function call (not a procedure call).")
            end
            super := super_feature(wrf)
            pn := precursor_name(wrf.name,super)
	    run_feature := ct.run_class.at(pn)
	    if run_feature = Void then
	       !RUN_FEATURE_10!run_feature.make(ct,pn,super)
	    end
            prepare_arguments(ct)
         else
            !!Result.make(start_position,parent,arguments)
            Result := Result.to_runnable(ct)
         end
      end

   stupid_switch(run_time_set: RUN_TIME_SET): BOOLEAN is
      do
         Result := true
      end

feature {COMPOUND,INSTRUCTION_WITH_COMMENT}

   verify_scoop(allowed: FORMAL_ARG_LIST) is
      do
      end

feature {NONE}

   put_semi_colon is
      do
         if pretty_printer.semi_colon_flag then
            pretty_printer.put_character(';')
         end
      end

end -- PRECURSOR_INSTRUCTION