| -- CC70B02.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 formal package actual part may specify actual parameters |
| -- for a generic formal package. Check that such an actual parameter may |
| -- be a formal parameter of a previously declared formal package |
| -- (with a (<>) actual part). Check that a use clause in the generic |
| -- formal part provides direct visibility of declarations within the |
| -- generic formal package, including formal parameters (if the formal |
| -- package has a (<>) actual part). Check that the scope of such a use |
| -- clause extends to the generic subprogram body. Check that the visible |
| -- part of the generic formal package includes the first list of basic |
| -- declarative items of the package specification. |
| -- |
| -- Check the case where the formal package is declared in a generic |
| -- package. |
| -- |
| -- TEST DESCRIPTION: |
| -- Declare a list abstraction in a generic package which manages lists of |
| -- elements of any nonlimited type (foundation code). Declare a second |
| -- generic package which declares operations on discrete types. Declare |
| -- a third generic package which combines the abstractions of the first |
| -- two generics and declares operations on lists of elements of discrete |
| -- types. Provide the third generic package with two formal parameters: |
| -- (1) a generic formal package with the discrete operation package as |
| -- template, and (2) a generic formal package with the list abstraction |
| -- package as template. Use the formal discrete type of the discrete |
| -- operations generic as the generic formal actual part for the second |
| -- formal package. Include a use clause for the first formal package in |
| -- the third generic package formal part. |
| -- |
| -- TEST FILES: |
| -- The following files comprise this test: |
| -- |
| -- FC70B00.A |
| -- CC70B02.A |
| -- |
| -- |
| -- CHANGE HISTORY: |
| -- 06 Dec 94 SAIC ACVC 2.0 |
| -- |
| --! |
| |
| generic |
| type Discrete_Type is (<>); -- Discrete types only. |
| package CC70B02_0 is -- Discrete type operations. |
| |
| procedure Double (Object : in out Discrete_Type); |
| |
| -- ... Other operations on discrete objects. |
| |
| end CC70B02_0; |
| |
| |
| --==================================================================-- |
| |
| |
| package body CC70B02_0 is |
| |
| procedure Double (Object : in out Discrete_Type) is |
| Doubled_Position : Integer := Discrete_Type'Pos (Object) * 2; |
| begin |
| -- ... Error-checking code omitted for brevity. |
| Object := Discrete_Type'Val (Doubled_Position); |
| end Double; |
| |
| end CC70B02_0; |
| |
| |
| --==================================================================-- |
| |
| |
| with CC70B02_0; -- Discrete type operations. |
| with FC70B00; -- List abstraction. |
| generic |
| |
| -- Import both the discrete-operation and list abstractions. To ensure that |
| -- only list abstraction instances defining lists of *discrete* elements |
| -- will be accepted as actuals to this generic, pass the formal discrete |
| -- type from the discrete-operation abstraction as an actual parameter to |
| -- the list-abstraction formal package. |
| -- |
| -- Only list instances declared for the same discrete type as that used |
| -- to instantiate the discrete-operation package will be accepted. |
| |
| with package Discrete_Ops is new CC70B02_0 (<>); |
| |
| use Discrete_Ops; -- Discrete_Ops directly visible. |
| |
| with package List_Mgr is new FC70B00 (Discrete_Type); -- Discrete_Type is |
| -- formal parameter |
| -- of template for |
| -- Discrete_Ops. |
| package CC70B02_1 is -- Discrete list operations. |
| |
| procedure Double_List (L : in out List_Mgr.List_Type); |
| |
| -- ... Other operations on lists of discrete objects. |
| |
| end CC70B02_1; |
| |
| |
| --==================================================================-- |
| |
| |
| package body CC70B02_1 is |
| |
| procedure Double_List (L : in out List_Mgr.List_Type) is |
| Element : Discrete_Type; -- Formal part of Discrete_Ops template |
| begin -- is directly visible here. |
| List_Mgr.Reset (L); |
| while not List_Mgr.End_Of_List (L) loop |
| List_Mgr.View_Element (L, Element); |
| Double (Element); |
| List_Mgr.Write_Element (L, Element); |
| end loop; |
| end Double_List; |
| |
| end CC70B02_1; |
| |
| |
| --==================================================================-- |
| |
| |
| with FC70B00; -- Generic list abstraction. |
| with CC70B02_0; -- Generic discrete type operations. |
| with CC70B02_1; -- Generic discrete list operations. |
| |
| with Report; |
| procedure CC70B02 is |
| |
| type Points is range 0 .. 100; -- Discrete type. |
| |
| package Points_Ops is new CC70B02_0 (Points); -- Points-type operations. |
| package Lists_of_Points is new FC70B00 (Points); -- Points lists. |
| package Points_List_Ops is new -- Points-list operations. |
| CC70B02_1 (Points_Ops, Lists_Of_Points); |
| |
| Scores : Lists_of_Points.List_Type; -- List of points. |
| |
| |
| -- Begin test code declarations: ----------------------- |
| |
| type TC_Score_Array is array (1 .. 3) of Points; |
| |
| TC_Initial_Values : constant TC_Score_Array := (23, 15, 0); |
| TC_Final_Values : constant TC_Score_Array := (46, 30, 0); |
| |
| TC_Correct_Initial_Values : Boolean := False; |
| TC_Correct_Final_Values : Boolean := False; |
| |
| |
| procedure TC_Initialize_List (L : in out Lists_Of_Points.List_Type) is |
| begin -- Initial list contains 3 scores |
| for I in TC_Score_Array'Range loop -- with the values 23, 15, and 0. |
| Lists_Of_Points.Add_Element (L, TC_Initial_Values(I)); |
| end loop; |
| end TC_Initialize_List; |
| |
| |
| procedure TC_Verify_List (L : in out Lists_Of_Points.List_Type; |
| Expected : in TC_Score_Array; |
| OK : out Boolean) is |
| Actual : TC_Score_Array; |
| begin -- Verify that all scores have been |
| Lists_Of_Points.Reset (L); -- set to zero. |
| for I in TC_Score_Array'Range loop |
| Lists_Of_Points.Read_Element (L, Actual(I)); |
| end loop; |
| OK := (Actual = Expected); |
| end TC_Verify_List; |
| |
| -- End test code declarations. ------------------------- |
| |
| |
| begin |
| Report.Test ("CC70B02", "Check that a library-level generic package " & |
| "may have a formal package as a formal parameter, and that " & |
| "the generic formal actual part may specify explicit actual " & |
| "parameters (including a formal parameter of a previously " & |
| "declared formal package). Check that a use clause is legal " & |
| "in the generic formal part"); |
| |
| TC_Initialize_List (Scores); |
| TC_Verify_List (Scores, TC_Initial_Values, TC_Correct_Initial_Values); |
| |
| if not TC_Correct_Initial_Values then |
| Report.Failed ("List contains incorrect initial values"); |
| end if; |
| |
| Points_List_Ops.Double_List (Scores); |
| TC_Verify_List (Scores, TC_Final_Values, TC_Correct_Final_Values); |
| |
| if not TC_Correct_Final_Values then |
| Report.Failed ("List contains incorrect final values"); |
| end if; |
| |
| Report.Result; |
| end CC70B02; |
