| -- 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; |