c393012.a

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-- C393012.A
--
--                             Grant of Unlimited Rights
--
--     Under contracts F33600-87-D-0337, F33600-84-D-0280, MDA903-79-C-0687,
--     F08630-91-C-0015, and DCA100-97-D-0025, the U.S. Government obtained 
--     unlimited rights in the software and documentation contained herein.
--     Unlimited rights are defined in DFAR 252.227-7013(a)(19).  By making 
--     this public release, the Government intends to confer upon all 
--     recipients unlimited rights  equal to those held by the Government.  
--     These rights include rights to use, duplicate, release or disclose the 
--     released technical data and computer software in whole or in part, in 
--     any manner and for any purpose whatsoever, and to have or permit others 
--     to do so.
--
--                                    DISCLAIMER
--
--     ALL MATERIALS OR INFORMATION HEREIN RELEASED, MADE AVAILABLE OR
--     DISCLOSED ARE AS IS.  THE GOVERNMENT MAKES NO EXPRESS OR IMPLIED 
--     WARRANTY AS TO ANY MATTER WHATSOEVER, INCLUDING THE CONDITIONS OF THE
--     SOFTWARE, DOCUMENTATION OR OTHER INFORMATION RELEASED, MADE AVAILABLE 
--     OR DISCLOSED, OR THE OWNERSHIP, MERCHANTABILITY, OR FITNESS FOR A
--     PARTICULAR PURPOSE OF SAID MATERIAL.
--*
--
-- OBJECTIVE:
--     Check that a non-abstract subprogram of an abstract type can be
--     called with a controlling operand that is a type conversion to
--     the abstract type.
--
--     Check that converting to the class-wide type of an abstract type
--     inside an operation of that type causes a "redispatch" of the
--     called operation.
--
-- TEST DESCRIPTION:
--     This test defines an abstract type, and further derives types from it.
--     The key feature of this test is in the "Display" procedures where
--     the bodies of these procedures convert an object to the class-wide
--     type of the root abstract type, causing a "redispatch".
--
--
-- CHANGE HISTORY:
--      06 Dec 94   SAIC    ACVC 2.0
--      16 Dec 94   SAIC    Add allocation to the object initializations
--
--!

package C393012_0 is

  subtype Row_Number  is Positive  range 1..120;
  subtype Seat_Letter is Character range 'A'..'M';

  type Ticket is abstract tagged
    record
      Flight : Natural;
      Row    : Row_Number;
      Seat   : Seat_Letter;
    end record;

   function Display( T: Ticket ) return String;
   function Service( T: Ticket ) return String is abstract;

end C393012_0;

with TCTouch;
package body C393012_0 is
   function Display( T: Ticket ) return String is
  begin
    TCTouch.Touch('T');  --------------------------------------------------- T
    return "Fl:" & Natural'Image(T.Flight)
         & Service( Ticket'Class( T ) )   
         & " Seat:" & Row_Number'Image(T.Row) & T.Seat;
  end Display;
end C393012_0;

with C393012_0;
package C393012_1 is
  type Economy is new C393012_0.Ticket with null record;
  function Display( T: Economy ) return String;
  function Service( T: Economy ) return String;

  type Meal_Designator is ( B, L, D, V, SN );

  type First is new C393012_0.Ticket with
    record
      Meal : Meal_Designator;
    end record;
  function Display( T: First ) return String;
  function Service( T: First ) return String;
  procedure Set_Meal( T: in out First; To_Meal : Meal_Designator );

end C393012_1;

with TCTouch;
package body C393012_1 is
  function Display( T: Economy ) return String is
  begin
    TCTouch.Touch('E');  --------------------------------------------------- E
    return C393012_0.Display( C393012_0.Ticket( T ) );  
  end Display;                -- conversion to abstract type

  function Service( T: Economy ) return String is
  begin
    TCTouch.Touch('e');  --------------------------------------------------- e
    return " K";
  end Service;

  function Display( T: First ) return String is
  begin
    TCTouch.Touch('F');  --------------------------------------------------- F
    return C393012_0.Display( C393012_0.Ticket( T ) );  
  end Display;                -- conversion to abstract type

  function Service( T: First ) return String is
  begin
    TCTouch.Touch('f');  --------------------------------------------------- f
    return " F" & Meal_Designator'Image(T.Meal);
  end Service;

  procedure Set_Meal( T: in out First; To_Meal : Meal_Designator ) is
  begin
    T.Meal := To_Meal;
  end Set_Meal;

end C393012_1;

with Report;
with TCTouch;
with C393012_0;
with C393012_1;
procedure C393012 is

  package Rt renames C393012_0;
  package Tx renames C393012_1;

  type Tix is access Rt.Ticket'Class;
  type Itinerary is array(Positive range 1..3) of Tix;

-- Outbound and Inbound itineraries provide different orderings of mixtures
-- of Economy and First_Class.  Not that that should make any difference...

  Outbound : Itinerary := ( 1 => new Tx.Economy'( 5335,  5, 'B' ),
                            2 => new Tx.First'  (   67,  1, 'J', Tx.L ),
                            3 => new Tx.Economy'(  345, 37, 'C' ) );

  Inbound  : Itinerary := ( 1 => new Tx.First'  (  456,  4, 'F', Tx.SN ),
                            2 => new Tx.Economy'(   68, 12, 'D' ),
                            3 => new Tx.Economy'( 5336,  6, 'A' ) );

-- Each call to Display uses a parameter that is a type conversion
-- to the abstract type Ticket.

  procedure TC_Convert( I: Itinerary; Leg1,Leg2,Leg3: String ) is
  begin
    if Rt.Display( Rt.Ticket( I(1).all ) ) /= Leg1 then
      Report.Failed( Rt.Display( Rt.Ticket( I(1).all ) ) & " /= " & Leg1 );
    end if;
    if Rt.Display( Rt.Ticket( I(2).all ) ) /= Leg2 then
      Report.Failed( Rt.Display( Rt.Ticket( I(2).all ) ) & " /= " & Leg2 );
    end if;
    if Rt.Display( Rt.Ticket( I(3).all ) ) /= Leg3 then
      Report.Failed( Rt.Display( Rt.Ticket( I(3).all ) ) & " /= " & Leg3 );
    end if;
  end TC_Convert;

-- Each call to Display uses a parameter that is not a type conversion

  procedure TC_Match( I: Itinerary; Leg1,Leg2,Leg3: String ) is
  begin
    if Rt.Display( I(1).all ) /= Leg1 then
      Report.Failed( Rt.Display( I(1).all ) & " /= " & Leg1 );
    end if;
    if Rt.Display( I(2).all ) /= Leg2 then
      Report.Failed( Rt.Display( I(2).all ) & " /= " & Leg2 );
    end if;
    if Rt.Display( I(3).all ) /= Leg3 then
      Report.Failed( Rt.Display( I(3).all ) & " /= " & Leg3 );
    end if;
  end TC_Match;

begin  -- Main test procedure.

   Report.Test ("C393012", "Check that a non-abstract subprogram of an "
                         & "abstract type can be called with a "
                         & "controlling operand that is a type "
                         & "conversion to the abstract type.  "
                         & "Check that converting to the class-wide type "
                         & "of an abstract type inside an operation of "
                         & "that type causes a redispatch" );

  -- Test conversions to abstract type

   TC_Convert( Outbound, "Fl: 5335 K Seat: 5B",
                         "Fl: 67 FL Seat: 1J",
                         "Fl: 345 K Seat: 37C" );

   TCTouch.Validate( "TeTfTe", "Outbound flight (converted)" );

   TC_Convert( Inbound, "Fl: 456 FSN Seat: 4F",
                        "Fl: 68 K Seat: 12D",
                        "Fl: 5336 K Seat: 6A" );

   TCTouch.Validate( "TfTeTe", "Inbound flight (converted)" );

  -- Test without conversions to abstract type

   TC_Match( Outbound, "Fl: 5335 K Seat: 5B",
                       "Fl: 67 FL Seat: 1J",
                       "Fl: 345 K Seat: 37C" );

   TCTouch.Validate( "ETeFTfETe", "Outbound flight" );

   TC_Match( Inbound, "Fl: 456 FSN Seat: 4F",
                       "Fl: 68 K Seat: 12D",
                       "Fl: 5336 K Seat: 6A" );

   TCTouch.Validate( "FTfETeETe", "Inbound flight" );

   Report.Result;

end C393012;