1-- CC70B02.A 2-- 3-- Grant of Unlimited Rights 4-- 5-- Under contracts F33600-87-D-0337, F33600-84-D-0280, MDA903-79-C-0687, 6-- F08630-91-C-0015, and DCA100-97-D-0025, the U.S. Government obtained 7-- unlimited rights in the software and documentation contained herein. 8-- Unlimited rights are defined in DFAR 252.227-7013(a)(19). By making 9-- this public release, the Government intends to confer upon all 10-- recipients unlimited rights equal to those held by the Government. 11-- These rights include rights to use, duplicate, release or disclose the 12-- released technical data and computer software in whole or in part, in 13-- any manner and for any purpose whatsoever, and to have or permit others 14-- to do so. 15-- 16-- DISCLAIMER 17-- 18-- ALL MATERIALS OR INFORMATION HEREIN RELEASED, MADE AVAILABLE OR 19-- DISCLOSED ARE AS IS. THE GOVERNMENT MAKES NO EXPRESS OR IMPLIED 20-- WARRANTY AS TO ANY MATTER WHATSOEVER, INCLUDING THE CONDITIONS OF THE 21-- SOFTWARE, DOCUMENTATION OR OTHER INFORMATION RELEASED, MADE AVAILABLE 22-- OR DISCLOSED, OR THE OWNERSHIP, MERCHANTABILITY, OR FITNESS FOR A 23-- PARTICULAR PURPOSE OF SAID MATERIAL. 24--* 25-- 26-- OBJECTIVE: 27-- Check that a formal package actual part may specify actual parameters 28-- for a generic formal package. Check that such an actual parameter may 29-- be a formal parameter of a previously declared formal package 30-- (with a (<>) actual part). Check that a use clause in the generic 31-- formal part provides direct visibility of declarations within the 32-- generic formal package, including formal parameters (if the formal 33-- package has a (<>) actual part). Check that the scope of such a use 34-- clause extends to the generic subprogram body. Check that the visible 35-- part of the generic formal package includes the first list of basic 36-- declarative items of the package specification. 37-- 38-- Check the case where the formal package is declared in a generic 39-- package. 40-- 41-- TEST DESCRIPTION: 42-- Declare a list abstraction in a generic package which manages lists of 43-- elements of any nonlimited type (foundation code). Declare a second 44-- generic package which declares operations on discrete types. Declare 45-- a third generic package which combines the abstractions of the first 46-- two generics and declares operations on lists of elements of discrete 47-- types. Provide the third generic package with two formal parameters: 48-- (1) a generic formal package with the discrete operation package as 49-- template, and (2) a generic formal package with the list abstraction 50-- package as template. Use the formal discrete type of the discrete 51-- operations generic as the generic formal actual part for the second 52-- formal package. Include a use clause for the first formal package in 53-- the third generic package formal part. 54-- 55-- TEST FILES: 56-- The following files comprise this test: 57-- 58-- FC70B00.A 59-- CC70B02.A 60-- 61-- 62-- CHANGE HISTORY: 63-- 06 Dec 94 SAIC ACVC 2.0 64-- 65--! 66 67generic 68 type Discrete_Type is (<>); -- Discrete types only. 69package CC70B02_0 is -- Discrete type operations. 70 71 procedure Double (Object : in out Discrete_Type); 72 73 -- ... Other operations on discrete objects. 74 75end CC70B02_0; 76 77 78 --==================================================================-- 79 80 81package body CC70B02_0 is 82 83 procedure Double (Object : in out Discrete_Type) is 84 Doubled_Position : Integer := Discrete_Type'Pos (Object) * 2; 85 begin 86 -- ... Error-checking code omitted for brevity. 87 Object := Discrete_Type'Val (Doubled_Position); 88 end Double; 89 90end CC70B02_0; 91 92 93 --==================================================================-- 94 95 96with CC70B02_0; -- Discrete type operations. 97with FC70B00; -- List abstraction. 98generic 99 100 -- Import both the discrete-operation and list abstractions. To ensure that 101 -- only list abstraction instances defining lists of *discrete* elements 102 -- will be accepted as actuals to this generic, pass the formal discrete 103 -- type from the discrete-operation abstraction as an actual parameter to 104 -- the list-abstraction formal package. 105 -- 106 -- Only list instances declared for the same discrete type as that used 107 -- to instantiate the discrete-operation package will be accepted. 108 109 with package Discrete_Ops is new CC70B02_0 (<>); 110 111 use Discrete_Ops; -- Discrete_Ops directly visible. 112 113 with package List_Mgr is new FC70B00 (Discrete_Type); -- Discrete_Type is 114 -- formal parameter 115 -- of template for 116 -- Discrete_Ops. 117package CC70B02_1 is -- Discrete list operations. 118 119 procedure Double_List (L : in out List_Mgr.List_Type); 120 121 -- ... Other operations on lists of discrete objects. 122 123end CC70B02_1; 124 125 126 --==================================================================-- 127 128 129package body CC70B02_1 is 130 131 procedure Double_List (L : in out List_Mgr.List_Type) is 132 Element : Discrete_Type; -- Formal part of Discrete_Ops template 133 begin -- is directly visible here. 134 List_Mgr.Reset (L); 135 while not List_Mgr.End_Of_List (L) loop 136 List_Mgr.View_Element (L, Element); 137 Double (Element); 138 List_Mgr.Write_Element (L, Element); 139 end loop; 140 end Double_List; 141 142end CC70B02_1; 143 144 145 --==================================================================-- 146 147 148with FC70B00; -- Generic list abstraction. 149with CC70B02_0; -- Generic discrete type operations. 150with CC70B02_1; -- Generic discrete list operations. 151 152with Report; 153procedure CC70B02 is 154 155 type Points is range 0 .. 100; -- Discrete type. 156 157 package Points_Ops is new CC70B02_0 (Points); -- Points-type operations. 158 package Lists_of_Points is new FC70B00 (Points); -- Points lists. 159 package Points_List_Ops is new -- Points-list operations. 160 CC70B02_1 (Points_Ops, Lists_Of_Points); 161 162 Scores : Lists_of_Points.List_Type; -- List of points. 163 164 165 -- Begin test code declarations: ----------------------- 166 167 type TC_Score_Array is array (1 .. 3) of Points; 168 169 TC_Initial_Values : constant TC_Score_Array := (23, 15, 0); 170 TC_Final_Values : constant TC_Score_Array := (46, 30, 0); 171 172 TC_Correct_Initial_Values : Boolean := False; 173 TC_Correct_Final_Values : Boolean := False; 174 175 176 procedure TC_Initialize_List (L : in out Lists_Of_Points.List_Type) is 177 begin -- Initial list contains 3 scores 178 for I in TC_Score_Array'Range loop -- with the values 23, 15, and 0. 179 Lists_Of_Points.Add_Element (L, TC_Initial_Values(I)); 180 end loop; 181 end TC_Initialize_List; 182 183 184 procedure TC_Verify_List (L : in out Lists_Of_Points.List_Type; 185 Expected : in TC_Score_Array; 186 OK : out Boolean) is 187 Actual : TC_Score_Array; 188 begin -- Verify that all scores have been 189 Lists_Of_Points.Reset (L); -- set to zero. 190 for I in TC_Score_Array'Range loop 191 Lists_Of_Points.Read_Element (L, Actual(I)); 192 end loop; 193 OK := (Actual = Expected); 194 end TC_Verify_List; 195 196 -- End test code declarations. ------------------------- 197 198 199begin 200 Report.Test ("CC70B02", "Check that a library-level generic package " & 201 "may have a formal package as a formal parameter, and that " & 202 "the generic formal actual part may specify explicit actual " & 203 "parameters (including a formal parameter of a previously " & 204 "declared formal package). Check that a use clause is legal " & 205 "in the generic formal part"); 206 207 TC_Initialize_List (Scores); 208 TC_Verify_List (Scores, TC_Initial_Values, TC_Correct_Initial_Values); 209 210 if not TC_Correct_Initial_Values then 211 Report.Failed ("List contains incorrect initial values"); 212 end if; 213 214 Points_List_Ops.Double_List (Scores); 215 TC_Verify_List (Scores, TC_Final_Values, TC_Correct_Final_Values); 216 217 if not TC_Correct_Final_Values then 218 Report.Failed ("List contains incorrect final values"); 219 end if; 220 221 Report.Result; 222end CC70B02; 223