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-- C392002.A

--

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--     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.

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--     this public release, the Government intends to confer upon all

--     recipients unlimited rights  equal to those held by the Government.

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--     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 the use of a class-wide formal parameter allows for the

--      proper dispatching of objects to the appropriate implementation of

--      a primitive operation.  Check this in the case where the root tagged

--      type is defined in a generic package, and the type derived from it is

--      defined in that same generic package.

--

-- TEST DESCRIPTION:

--      Declare a root tagged type, and some associated primitive operations.

--      Extend the root type, and override one or more primitive operations,

--      inheriting the other primitive operations from the root type.

--      Derive from the extended type, again overriding some primitive

--      operations and inheriting others (including some that the parent

--      inherited).

--      Define a subprogram with a class-wide parameter, inside of which is a

--      call on a dispatching primitive operation.  These primitive operations

--      modify global variables (the class-wide parameter has mode IN).

--

--  The following hierarchy of tagged types and primitive operations is

--  utilized in this test:

--

--

--    type Vehicle (root)

--            |

--    type Motorcycle

--            |

--            | Operations

--            |   Engine_Size

--            |   Catalytic_Converter

--            |   Emissions_Produced

--            |

--    type Automobile (extended from Motorcycle)

--            |

--            | Operations

--            |   (Engine_Size)       (inherited)

--            |   Catalytic_Converter (overridden)

--            |   Emissions_Produced  (overridden)

--            |

--    type Truck (extended from Automobile)

--            |

--            | Operations

--            |   (Engine_Size)         (inherited twice - Motorcycle)

--            |   (Catalytic_Converter) (inherited - Automobile)

--            |   Emissions_Produced    (overridden)

--

--

-- In this test, we are concerned with the following selection of dispatching

-- calls, accomplished with the use of a Vehicle'Class IN procedure

-- parameter :

--

--                       \ Type

--               Prim. Op \   Motorcycle      Automobile        Truck

--                         \------------------------------------------------

--             Engine_Size |      X               X               X

--     Catalytic_Converter |      X               X               X

--     Emissions_Produced  |      X               X               X

--

--

--

-- The location of the declaration and derivation of the root and extended

-- types will be varied over a series of tests.  Locations of declaration

-- and derivation for a particular test are marked with an asterisk (*).

--

-- Root type:

--

--       Declared in package.

--    *  Declared in generic package.

--

-- Extended types:

--

--    *  Derived in parent location.

--       Derived in a nested package.

--       Derived in a nested subprogram.

--       Derived in a nested generic package.

--       Derived in a separate package.

--       Derived in a separate visible child package.

--       Derived in a separate private child package.

--

-- Primitive Operations:

--

--    *  Procedures with same parameter profile.

--       Procedures with different parameter profile.

--    *  Functions with same parameter profile.

--       Functions with different parameter profile.

--    *  Mixture of Procedures and Functions.

--

--

-- CHANGE HISTORY:

--      06 Dec 94   SAIC    ACVC 2.0

--      09 May 96   SAIC    Made single-file for 2.1

--

--!

------------------------------------------------------------------- C392002_0

-- Declare the root and extended types, along with their primitive

-- operations in a generic package.

generic

   type Cubic_Inches     is range <>;

   type Emission_Measure is digits <>;

   Emissions_per_Engine_Cubic_Inch : Emission_Measure;

package C392002_0 is       -- package Vehicle_Simulation

   --

   -- Equipment types and their primitive operations.

   --

   -- Root type.

   type Vehicle is abstract tagged

      record

         Weight : Integer;

         Wheels : Positive;

      end record;

   -- Abstract operations of type Vehicle.

   function Engine_Size         (V : in Vehicle) return Cubic_Inches

            is abstract;

   function Catalytic_Converter (V : in Vehicle) return Boolean

            is abstract;

   function Emissions_Produced  (V : in Vehicle) return Emission_Measure

            is abstract;

   --

   type Motorcycle is new Vehicle with

      record

         Size_Of_Engine : Cubic_Inches;

      end record;

   -- Primitive operations of type Motorcycle.

   function Engine_Size         (V : in Motorcycle) return Cubic_Inches;

   function Catalytic_Converter (V : in Motorcycle) return Boolean;

   function Emissions_Produced  (V : in Motorcycle) return Emission_Measure;

   --

   type Automobile is new Motorcycle with

      record

         Passenger_Capacity : Integer;

      end record;

   -- Function Engine_Size inherited from parent (Motorcycle).

   -- Primitive operations (Overridden).

   function Catalytic_Converter (V : in Automobile) return Boolean;

   function Emissions_Produced  (V : in Automobile) return Emission_Measure;

   --

   type Truck is new Automobile with

      record

         Hauling_Capacity : Natural;

      end record;

   -- Function Engine_Size inherited twice.

   -- Function Catalytic_Converter inherited from parent (Automobile).

   -- Primitive operation (Overridden).

   function Emissions_Produced  (V : in Truck) return Emission_Measure;

end C392002_0;

-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --

package body c392002_0 is

   --

   -- Primitive operations for Motorcycle.

   --

   function Engine_Size         (V : in Motorcycle) return Cubic_Inches is

   begin

      return (V.Size_Of_Engine);

   end Engine_Size;

   function Catalytic_Converter (V : in Motorcycle) return Boolean is

   begin

      return (False);

   end Catalytic_Converter;

   function Emissions_Produced  (V : in Motorcycle) return Emission_Measure is

   begin

      return 100.00;

   end Emissions_Produced;

   --

   -- Overridden operations for Automobile type.

   --

   function Catalytic_Converter (V : in Automobile) return Boolean is

   begin

      return (True);

   end Catalytic_Converter;

   function Emissions_Produced  (V : in Automobile) return Emission_Measure is

   begin

      return 200.00;

   end Emissions_Produced;

   --

   -- Overridden operation for Truck type.

   --

   function Emissions_Produced  (V : in Truck) return Emission_Measure is

   begin

      return 300.00;

   end Emissions_Produced;

end C392002_0;

--------------------------------------------------------------------- C392002

with C392002_0;        -- with Vehicle_Simulation;

with Report;

procedure C392002 is

   type Decade                     is (c1970, c1980, c1990);

   type Vehicle_Emissions          is digits 6;

   type Engine_Emissions_by_Decade is array (Decade) of Vehicle_Emissions;

   subtype Engine_Size             is Integer range 100 .. 1000;

   Five_Tons                  : constant Natural := 10000;

   Catalytic_Converter_Offset : constant Vehicle_Emissions := 0.8;

   Truck_Adjustment_Factor    : constant Vehicle_Emissions := 1.2;

   Engine_Emission_Factor : Engine_Emissions_by_Decade := (c1970 => 10.00,

                                                           c1980 =>  8.00,

                                                           c1990 =>  5.00);

   -- Instantiate generic package for 1970 simulation.

   package Sim_1970 is new C392002_0

     (Cubic_Inches                    => Engine_Size,

      Emission_Measure                => Vehicle_Emissions,

      Emissions_Per_Engine_Cubic_Inch => Engine_Emission_Factor (c1970));

   -- Declare and initialize vehicle objects.

   Cycle_1970 : Sim_1970.Motorcycle := (Weight         => 400,

                                        Wheels         =>   2,

                                        Size_Of_Engine => 100);

   Auto_1970  : Sim_1970.Automobile := (2000, 4, 500, 5);

   Truck_1970 : Sim_1970.Truck      := (Weight             => 5000,

                                        Wheels             => 18,

                                        Size_Of_Engine     => 1000,

                                        Passenger_Capacity => 2,

                                        Hauling_Capacity   => Five_Tons);

   -- Function Get_Engine_Size performs a dispatching call on a

   -- primitive operation that has been defined for an ancestor type and

   -- inherited by each type derived from the ancestor.

   function Get_Engine_Size (V : in Sim_1970.Vehicle'Class)

     return Engine_Size is

   begin

     return (Sim_1970.Engine_Size (V)); -- Dispatch according to tag.

   end Get_Engine_Size;

   -- Function Catalytic_Converter_Present performs a dispatching call on

   -- a primitive operation that has been defined for an ancestor type,

   -- overridden in the parent extended type, and inherited by the subsequent

   -- extended type.

   function Catalytic_Converter_Present (V : in Sim_1970.Vehicle'Class)

     return Boolean is

   begin

      return (Sim_1970.Catalytic_Converter (V)); -- Dispatch according to tag.

   end Catalytic_Converter_Present;

   -- Function Air_Quality_Measure performs a dispatching call on

   -- a primitive operation that has been defined for an ancestor type, and

   -- overridden in each subsequent extended type.

   function Air_Quality_Measure (V : in Sim_1970.Vehicle'Class)

     return Vehicle_Emissions is

   begin

      return (Sim_1970.Emissions_Produced (V));  -- Dispatch according to tag.

   end Air_Quality_Measure;

-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --

begin  -- Main test procedure.

   Report.Test ("C392002",  "Check that the use of a class-wide parameter "

                          & "allows for proper dispatching where root type "

                          & "and extended types are declared in the same "

                          & "generic package" );

   if (Get_Engine_Size (Cycle_1970) /=  100) or

      (Get_Engine_Size (Auto_1970)  /=  500) or

      (Get_Engine_Size (Truck_1970) /= 1000)

   then

      Report.Failed ("Failed dispatch to Get_Engine_Size");

   end if;

   if Catalytic_Converter_Present (Cycle_1970)    or

      not Catalytic_Converter_Present (Auto_1970) or

      not Catalytic_Converter_Present (Truck_1970)

   then

      Report.Failed ("Failed dispatch to Catalytic_Converter_Present");

   end if;

   if ((Air_Quality_Measure (Cycle_1970) /= 100.00) or

       (Air_Quality_Measure (Auto_1970)  /= 200.00) or

       (Air_Quality_Measure (Truck_1970) /= 300.00))

   then

      Report.Failed ("Failed dispatch to Air_Quality_Measure");

   end if;

   Report.Result;

end C392002;