-- 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_FEATURE_CONSTANT

inherit
   LIBERTY_FEATURE
      rename
         make as make_late_binding
      redefine
         set_specialized_in
      end

create {LIBERTY_BUILDER_TOOLS}
   make

feature {ANY}
   expression: LIBERTY_EXPRESSION

feature {ANY}
   accept (v: VISITOR) is
      local
         v0: LIBERTY_FEATURE_CONSTANT_VISITOR
      do
         v0 ::= v
         v0.visit_liberty_feature_constant(Current)
      end

feature {LIBERTY_FEATURE}
   set_specialized_in (a_original: like Current; a_context: like context) is
      do
         Precursor(a_original, a_context)
         expression := expression.specialized_in(a_context.current_type)
      end

feature {}
   do_join (a_type: LIBERTY_ACTUAL_TYPE; a_feature: LIBERTY_FEATURE; current_fd, other_fd: LIBERTY_FEATURE_DEFINITION): LIBERTY_FEATURE is
      do
         Result := a_feature.joined_constant(a_type, Current, other_fd, current_fd)
      end

feature {LIBERTY_FEATURE}
   joined_attribute (a_type: LIBERTY_ACTUAL_TYPE; a_feature: LIBERTY_FEATURE_ATTRIBUTE; current_fd, other_fd: LIBERTY_FEATURE_DEFINITION): LIBERTY_FEATURE is
      do
         current_fd.fatal_join_error_concrete_concrete(a_type, other_fd)
      end

   joined_constant (a_type: LIBERTY_ACTUAL_TYPE; a_feature: LIBERTY_FEATURE_CONSTANT; current_fd, other_fd: LIBERTY_FEATURE_DEFINITION): LIBERTY_FEATURE is
      do
         current_fd.fatal_join_error_concrete_concrete(a_type, other_fd)
      end

   joined_deferred (a_type: LIBERTY_ACTUAL_TYPE; a_feature: LIBERTY_FEATURE_DEFERRED; current_fd, other_fd: LIBERTY_FEATURE_DEFINITION): LIBERTY_FEATURE is
      do
         Result := Current
      end

   joined_do (a_type: LIBERTY_ACTUAL_TYPE; a_feature: LIBERTY_FEATURE_DO; current_fd, other_fd: LIBERTY_FEATURE_DEFINITION): LIBERTY_FEATURE is
      do
         current_fd.fatal_join_error_concrete_concrete(a_type, other_fd)
      end

   joined_external (a_type: LIBERTY_ACTUAL_TYPE; a_feature: LIBERTY_FEATURE_EXTERNAL; current_fd, other_fd: LIBERTY_FEATURE_DEFINITION): LIBERTY_FEATURE is
      do
         current_fd.fatal_join_error_concrete_concrete(a_type, other_fd)
      end

   joined_once (a_type: LIBERTY_ACTUAL_TYPE; a_feature: LIBERTY_FEATURE_ONCE; current_fd, other_fd: LIBERTY_FEATURE_DEFINITION): LIBERTY_FEATURE is
      do
         current_fd.fatal_join_error_concrete_concrete(a_type, other_fd)
      end

   joined_redefined (a_type: LIBERTY_ACTUAL_TYPE; a_feature: LIBERTY_FEATURE_REDEFINED; current_fd, other_fd: LIBERTY_FEATURE_DEFINITION): LIBERTY_FEATURE is
      do
         if a_feature.definition_type = definition_type then
            current_fd.fatal_join_error_concrete_redefined(a_type, other_fd)
         end
         Result := Current
      end

   joined_unique (a_type: LIBERTY_ACTUAL_TYPE; a_feature: LIBERTY_FEATURE_UNIQUE; current_fd, other_fd: LIBERTY_FEATURE_DEFINITION): LIBERTY_FEATURE is
      do
         current_fd.fatal_join_error_concrete_concrete(a_type, other_fd)
      end

feature {}
   make (a_definition_type: like definition_type; a_expression: like expression) is
      require
         a_definition_type /= Void
         a_expression /= Void
      do
         make_late_binding(a_definition_type, Void)
         expression := a_expression
      ensure
         definition_type = a_definition_type
         expression = a_expression
      end

invariant
   expression /= Void

end