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-- C3A0011.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 an access-to-subprogram object whose type is declared in a
-- parent package, may be used to invoke subprograms in a child package.
-- Check that such access objects may be stored in a data structure and
-- that subprograms may be called by walking the data structure.
--
-- TEST DESCRIPTION:
-- In the package, declare an access to procedure type. Declare an
-- array of the access type. Declare three different procedures that
-- can be referred to by the access to procedure type.
--
-- In the visible child package, declare two procedures that can be
-- referred to by the access to procedure type of the parent. Build
-- the array by calling each procedure indirectly through the access
-- value.
--
--
-- CHANGE HISTORY:
-- 06 Dec 94 SAIC ACVC 2.0
-- 16 Dec 94 SAIC Improved visibility of "/=" in main body
--
--!
package C3A0011_0 is -- Interpreter
type Compass_Point is mod 360;
function Heading return Compass_Point;
-- Type accesses to any procedure
type Action_Ptr is access procedure;
-- Array of access to procedure
type Action_Array is array (Natural range <>) of Action_Ptr;
procedure Rotate_Left;
procedure Rotate_Right;
procedure Center;
private
The_Heading : Compass_Point := Compass_Point'First;
end C3A0011_0;
-----------------------------------------------------------------------------
package body C3A0011_0 is
function Heading return Compass_Point is
begin
return The_Heading;
end Heading;
procedure Rotate_Left is
begin
The_Heading := The_Heading - 90;
end Rotate_Left;
procedure Rotate_Right is
begin
The_Heading := The_Heading + 90;
end Rotate_Right;
procedure Center is
begin
The_Heading := 0;
end Center;
end C3A0011_0;
-----------------------------------------------------------------------------
package C3A0011_0.Action is
procedure Rotate_Front;
procedure Rotate_Back;
end C3A0011_0.Action;
-----------------------------------------------------------------------------
package body C3A0011_0.Action is
procedure Rotate_Front is
begin
The_Heading := The_Heading + 5;
end Rotate_Front;
procedure Rotate_Back is
begin
The_Heading := The_Heading - 5;
end Rotate_Back;
end C3A0011_0.Action;
-----------------------------------------------------------------------------
with C3A0011_0.Action;
with Report;
procedure C3A0011 is
Total_Actions : constant := 6;
Action_Sequence : C3A0011_0.Action_Array (1 .. Total_Actions);
type Result_Array is array (Natural range <>) of C3A0011_0.Compass_Point;
Action_Results : Result_Array(1 .. Total_Actions);
package IA renames C3A0011_0.Action;
begin
Report.Test ("C3A0011", "Check that an access-to-subprogram object whose "
& "type is declared in a parent package, may be "
& "used to invoke subprograms in a child package. "
& "Check that such access objects may be stored in "
& "a data structure and that subprograms may be "
& "called by walking the data structure");
-- Build the action sequence
Action_Sequence := (C3A0011_0.Rotate_Left'Access,
C3A0011_0.Center'Access,
C3A0011_0.Rotate_Right'Access,
IA.Rotate_Front'Access,
C3A0011_0.Center'Access,
IA.Rotate_Back'Access);
-- Build the expected result
Action_Results := ( 270, 0, 90, 95, 0, 355 );
-- Assign actions by invoking subprogram designated by access value
for I in Action_Sequence'Range loop
Action_Sequence(I).all;
if C3A0011_0."/="( C3A0011_0.Heading, Action_Results(I) ) then
Report.Failed ("Expecting "
& C3A0011_0.Compass_Point'Image(Action_Results(I))
& " Got"
& C3A0011_0.Compass_Point'Image(C3A0011_0.Heading));
end if;
end loop;
Report.Result;
end C3A0011;
|
