-- This file is part of Liberty Eiffel.
--
-- Liberty Eiffel 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, version 3 of the License.
--
-- Liberty Eiffel 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 Liberty Eiffel.  If not, see <http://www.gnu.org/licenses/>.
--
class LIBERTY_DELAYED_FEATURE_TYPE

inherit
   LIBERTY_DELAYED_RESOLVER

insert
   LIBERTY_REACHABLE
      redefine out_in_tagged_out_memory, is_equal
      end

creation {LIBERTY_FEATURE_ENTITY, LIBERTY_DELAYED_FEATURE_TYPE}
   make

feature {ANY}
   out_in_tagged_out_memory is
      do
         if can_resolve then
            resolved.out_in_tagged_out_memory
         else
            tagged_out_memory.append(once "like (")
            type.full_name.out_in_tagged_out_memory
            tagged_out_memory.extend('.')
            name.out_in_tagged_out_memory
            tagged_out_memory.extend(')')
         end
      end

   full_name: FIXED_STRING is
      do
         Result := full_name_memory
      end

   hash_code: INTEGER is
      do
         Result := full_name_memory.hash_code
      end

   is_equal (other: like Current): BOOLEAN is
      do
         Result := other = Current
      end

feature {LIBERTY_DELAYED_TYPE}
   can_resolve: BOOLEAN is
      do
         Result := is_ready
            and then the_feature.result_type /= Void
            and then the_feature.result_type.is_known
      end

   resolved: LIBERTY_KNOWN_TYPE is
      do
         Result := the_feature.result_type.known_type
      end

feature {LIBERTY_DELAYED_TYPE, LIBERTY_FEATURE_ENTITY}
   specialized_in (a_type: LIBERTY_ACTUAL_TYPE): like Current is
      local
         t: like type
      do
         t := type.specialized_in(a_type)
         if t = type then
            Result := Current
         else
            create Result.make(t, name) -- ?????
         end
      end

feature {LIBERTY_FEATURE_ENTITY}
   is_ready: BOOLEAN is
      do
         Result := type.is_known
            and then type.known_type.has_feature(name)
            and then type.known_type.feature_definition(name).the_feature /= Void
      end

   the_feature: LIBERTY_FEATURE is
      require
         is_ready
      do
         Result := type.known_type.feature_definition(name).the_feature
      end

   name: LIBERTY_FEATURE_NAME
   type: LIBERTY_TYPE

feature {LIBERTY_REACHABLE, LIBERTY_REACHABLE_COLLECTION_MARKER}
   mark_reachable_code (mark: INTEGER) is
      do
         type.mark_reachable_code(mark)
         if is_ready then
            the_feature.mark_reachable_code(mark)
         end
      end

feature {}
   make (a_type: like type; a_name: like name) is
      require
         a_type /= Void
         a_name /= Void
      do
         type := a_type
         name := a_name

         lock_tagged_out
         tagged_out_memory.copy(once "like (")
         type.full_name.out_in_tagged_out_memory
         tagged_out_memory.extend('.')
         name.out_in_tagged_out_memory
         tagged_out_memory.extend(')')
         unlock_tagged_out

         full_name_memory := tagged_out_memory.intern
      ensure
         type = a_type
         name = a_name
      end

   full_name_memory: FIXED_STRING

invariant
   type /= Void
   name /= Void

end -- class LIBERTY_DELAYED_FEATURE_TYPE