-- CC70B02.A -- -- Grant of Unlimited Rights -- -- Under contracts F33600-87-D-0337, F33600-84-D-0280, MDA903-79-C-0687 and -- F08630-91-C-0015, 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;