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1 149 jeremybenn
-- CC51002.A
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--
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--                             Grant of Unlimited Rights
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--
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--     Under contracts F33600-87-D-0337, F33600-84-D-0280, MDA903-79-C-0687,
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--     F08630-91-C-0015, and DCA100-97-D-0025, the U.S. Government obtained
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--     unlimited rights in the software and documentation contained herein.
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--     Unlimited rights are defined in DFAR 252.227-7013(a)(19).  By making
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--     this public release, the Government intends to confer upon all
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--     recipients unlimited rights  equal to those held by the Government.
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--     These rights include rights to use, duplicate, release or disclose the
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--     released technical data and computer software in whole or in part, in
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--     any manner and for any purpose whatsoever, and to have or permit others
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--     to do so.
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--
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--                                    DISCLAIMER
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--
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--     ALL MATERIALS OR INFORMATION HEREIN RELEASED, MADE AVAILABLE OR
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--     DISCLOSED ARE AS IS.  THE GOVERNMENT MAKES NO EXPRESS OR IMPLIED
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--     WARRANTY AS TO ANY MATTER WHATSOEVER, INCLUDING THE CONDITIONS OF THE
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--     SOFTWARE, DOCUMENTATION OR OTHER INFORMATION RELEASED, MADE AVAILABLE
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--     OR DISCLOSED, OR THE OWNERSHIP, MERCHANTABILITY, OR FITNESS FOR A
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--     PARTICULAR PURPOSE OF SAID MATERIAL.
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--*
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--
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-- OBJECTIVE:
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--      Check that, for formal derived tagged types, the formal parameter
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--      names and default expressions for a primitive subprogram in an
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--      instance are determined by the primitive subprogram of the ancestor
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--      type, but that the primitive subprogram body executed is that of the
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--      actual type.
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--
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-- TEST DESCRIPTION:
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--      Define a root tagged type in a library-level package and give it a
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--      primitive subprogram. Provide a default expression for a non-tagged
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--      parameter of the subprogram. Declare a library-level generic subprogram
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--      with a formal derived type using the root type as ancestor. Call
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--      the primitive subprogram of the root type using named association for
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--      the tagged parameter, and provide no actual for the defaulted
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--      parameter. Extend the root type in a second package and override the
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--      root type's subprogram with one which has different parameter names
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--      and no default expression for the non-tagged parameter. Instantiate
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--      the generic subprogram for each of the tagged types in the class and
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--      call the instances.
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--
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--
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-- CHANGE HISTORY:
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--      06 Dec 94   SAIC    ACVC 2.0
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--
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--!
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package CC51002_0 is  -- Root message type and operations.
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   type Recipients is (None, Root, Sysop, Local, Remote);
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   type Msg_Type is tagged record                             -- Root type of
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      Text : String (1 .. 10);                                -- class.
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   end record;
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   function Send (Msg : in Msg_Type;                          -- Primitive
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                  To  : Recipients := Local) return Boolean;  -- subprogram.
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   -- ...Other message operations.
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end CC51002_0;
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     --==================================================================--
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package body CC51002_0 is
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   -- The implementation of Send is purely artificial; the validity of
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   -- its implementation in the context of the abstraction is irrelevant to
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   -- the feature being tested.
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   function Send (Msg : in Msg_Type;
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                  To  : Recipients := Local) return Boolean is
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   begin
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      return (Msg.Text = "Greetings!" and To = Local);
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   end Send;
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end CC51002_0;
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     --==================================================================--
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with CC51002_0;  -- Root message type and operations.
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generic          -- Message class function.
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   type Msg_Block is new CC51002_0.Msg_Type with private;
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function CC51002_1 (M : in Msg_Block) return Boolean;
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     --==================================================================--
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function CC51002_1 (M : in Msg_Block) return Boolean is
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   Okay : Boolean := False;
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begin
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   -- The call to Send below uses the ancestor type's parameter name, which
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   -- should be legal even if the actual subprogram called does not have a
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   -- parameter of that name. Furthermore, it uses the ancestor type's default
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   -- expression for the second parameter, which should be legal even if the
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   -- the actual subprogram called has no such default expression.
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   Okay := Send (Msg => M);
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   -- ...Other processing.
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   return Okay;
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end CC51002_1;
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     --==================================================================--
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with CC51002_0;       -- Root message type and operations.
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package CC51002_2 is  -- Extended message type and operations.
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   type Sender_Type is (Inside, Outside);
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   type Who_Msg_Type is new CC51002_0.Msg_Type with record   -- Derivative of
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      From : Sender_Type;                                    -- root type of
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   end record;                                               -- class.
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   -- Note: this overriding version of Send has different parameter names
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   -- from the root type's function. It also has no default expression.
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   function Send (M : Who_Msg_Type;                          -- Overrides
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                  R : CC51002_0.Recipients) return Boolean;  -- root type's
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                                                             -- operation.
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   -- ...Other extended message operations.
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end CC51002_2;
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     --==================================================================--
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package body CC51002_2 is
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   -- The implementation of Send is purely artificial; the validity of
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   -- its implementation in the context of the abstraction is irrelevant to
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   -- the feature being tested.
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   function Send (M : Who_Msg_Type; R : CC51002_0.Recipients) return Boolean is
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      use type CC51002_0.Recipients;
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   begin
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      return (M.Text = "Willkommen"     and
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              M.From = Outside          and
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              R      = CC51002_0.Local);
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   end Send;
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end CC51002_2;
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     --==================================================================--
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with CC51002_0;  -- Root message type and operations.
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with CC51002_1;  -- Message class function.
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with CC51002_2;  -- Extended message type and operations.
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with Report;
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procedure CC51002 is
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   function Send_Msg  is new CC51002_1 (CC51002_0.Msg_Type);
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   function Send_WMsg is new CC51002_1 (CC51002_2.Who_Msg_Type);
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   Mess  : CC51002_0.Msg_Type     := (Text => "Greetings!");
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   WMess : CC51002_2.Who_Msg_Type := (Text => "Willkommen",
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                                      From => CC51002_2.Outside);
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   TC_Okay_MStatus  : Boolean := False;
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   TC_Okay_WMStatus : Boolean := False;
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begin
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   Report.Test ("CC51002", "Check that, for formal derived tagged types, " &
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                "the formal parameter names and default expressions for "  &
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                "a primitive subprogram in an instance are determined by " &
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                "the primitive subprogram of the ancestor type, but that " &
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                "the primitive subprogram body executed is that of the"    &
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                "actual type");
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   TC_Okay_MStatus := Send_Msg (Mess);
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   if not TC_Okay_MStatus then
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      Report.Failed ("Wrong result from call to root type's operation");
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   end if;
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   TC_Okay_WMStatus := Send_WMsg (WMess);
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   if not TC_Okay_WMStatus then
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      Report.Failed ("Wrong result from call to derived type's operation");
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   end if;
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   Report.Result;
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end CC51002;

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