-- FXAIB00.A
--
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--                                     Notice
--
--     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.
--
--*
--
-- FOUNDATION DESCRIPTION:
--      This package declares types and functions which represent map
--      locations, both without and with unique ids. These types are used
--      to check that containers are preelaborated.
--
-- CHANGE HISTORY:
--      23 Dec 20   RLB     Created foundation.
--
--!

package FXAIB00
  with Preelaborate is

   type Location is record
       X, Y : Integer := 0;
   end record;
   -- This type has Preelaborable Initialization (see 10.2.1).

   function Get_Id return Natural;
      -- Return a different Id with each call.

   type Tagged_Location is record
       Id  : Natural := Get_Id;
       Loc : Location;
   end record;
   -- This type does not have Preelaborable Initialization (see 10.2.1).

end FXAIB00;

package body FXAIB00 is

   Id_Generator : Natural := 0;

   function Get_Id return Natural is
      -- Return a different Id with each call.
   begin
      if Id_Generator > Natural'Last - 10 then
          -- Let the generator wrap. We use "mod 7" so the
          -- Ids stay unique as long as possible.
          Id_Generator := Id_Generator mod 7;
      end if;
      Id_Generator := Id_Generator + 7;
      return Id_Generator;
   end Get_Id;

end FXAIB00;