-- C611B020.A
--
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--                                     Notice
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--     The ACAA has created and maintains the Ada Conformity Assessment Test
--     Suite for the purpose of conformity assessments conducted in accordance
--     with the International Standard ISO/IEC 18009 - Ada: Conformity
--     assessment of a language processor. This test suite should not be used
--     to make claims of conformance unless used in accordance with
--     ISO/IEC 18009 and any applicable ACAA procedures.
--*
--
-- OBJECTIVE:
--      For X'Old given in the postcondition for a subprogram S, check that
--      X'Old has the same tag as X when X is a parameter P of S, even if the
--      tag of X is different than the nominal subtype of P. (Part 2:
--      Post'Class)
--
-- TEST DESCRIPTION:
--      We declare an event counter type and an extension thereof. We include
--      function calls that are bound based on the type of the prefix, and
--      check which are called.
--
--      To check the objective, we directly check the tag. It would have been
--      more usage-oriented to test dispatching instead, but that would have
--      added more complication to the test.
--
-- TEST FILES:
--      This test consists of the following files:
--      -> C611B020.A
--         C611B021.A
--         C611B022.AM
--
-- CHANGE HISTORY:
--      21 Mar 16   JAC     Initial pre-release version.
--      24 Mar 16   RLB     Renamed so all test parts have same first 7
--                          characters.
--
--!
package C611B020 is

   pragma Assertion_Policy (Check);

   type Event_Record is tagged private;

   procedure Event_Occurred (Event : in out Event_Record)
      with Post'Class => Event.Count1 = Event'Old.Count2 + 1;

   function  Count1         (Event : in     Event_Record) return Integer;
   function  Count2         (Event : in     Event_Record) return Integer;

private

   type Event_Record is tagged record
      Id                : Integer := 0;
      No_Of_Occurrences : Integer := 0;
   end record;

end C611B020;

with F611B00;

package body C611B020 is

   procedure Event_Occurred (Event : in out Event_Record) is
   begin
      Event.No_Of_Occurrences := Event.No_Of_Occurrences + 1;
   end Event_Occurred;

   function Count1 (Event : in Event_Record) return Integer is
   begin
      F611B00.TC_Log_Event_Record_Count1_Called (
         Event_Record'Class(Event)'Tag);

      return Event.No_Of_Occurrences;
   end Count1;

   function Count2 (Event : in Event_Record) return Integer is
   begin
      F611B00.TC_Log_Event_Record_Count2_Called (
         Event_Record'Class(Event)'Tag);

      return Event.No_Of_Occurrences;
   end Count2;

end C611B020;