1-- CC70C02.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 generic formal package is an instance. Specifically, 28-- check that a generic formal package may be passed as an actual 29-- parameter to another generic formal package. Check that the 30-- visible part of the generic formal package includes the first list of 31-- basic declarative items of the package specification. 32-- 33-- TEST DESCRIPTION: 34-- A generic formal package is a package, and is an instance. 35-- 36-- Declare a list type in a generic package for lists of elements of any 37-- nonlimited type (foundation code). Declare a second generic package 38-- which declares operations for the list type, and parameterize it with 39-- a generic formal package with the list-type package as template 40-- (foundation code). Declare a third generic package which declares 41-- additional operations for the list type, and parameterize it with two 42-- generic formal packages, one with the list-type package as template, 43-- the other with the second generic package as template. Use the first 44-- formal package as the generic formal actual part for the second formal 45-- package. 46-- 47-- TEST FILES: 48-- The following files comprise this test: 49-- 50-- FC70C00.A 51-- CC70C02.A 52-- 53-- 54-- CHANGE HISTORY: 55-- 06 Dec 94 SAIC ACVC 2.0 56-- 57--! 58 59with FC70C00_0; -- List abstraction. 60with FC70C00_1; -- Basic list operations. 61generic 62 63 -- Import both the list-type abstraction defined in FC70C00_0 and the basic 64 -- list operations defined in FC70C00_1. To ensure that only basic operation 65 -- instances for lists of the same element type as that used to instantiate 66 -- the list type are accepted as actuals to this generic, pass the list-type 67 -- formal package as an actual parameter to the list-operation formal 68 -- package. 69 70 with package Lists is new FC70C00_0 (<>); 71 with package Basic_List_Ops is new FC70C00_1 (Lists); 72package CC70C02_0 is -- Additional list operations. 73 74 End_of_List_Reached : exception; 75 76 77 -- Read from current element and advance "current" pointer. 78 procedure Read_Element (L : in out Lists.List_Type; 79 E : out Lists.Element_Type); 80 81 -- Add element to end of list. 82 procedure Add_Element (L : in out Lists.List_Type; 83 E : in Lists.Element_Type); 84 85end CC70C02_0; 86 87 88 --==================================================================-- 89 90 91package body CC70C02_0 is 92 93 procedure Read_Element (L : in out Lists.List_Type; 94 E : out Lists.Element_Type) is 95 begin 96 if Basic_List_Ops.End_Of_List (L) then -- Use of op from the previous 97 raise End_Of_List_Reached; -- generic package. 98 else 99 E := L.Current.Item; -- Retrieve current element. 100 L.Current := L.Current.Next; -- Advance "current" pointer. 101 end if; 102 end Read_Element; 103 104 105 procedure Add_Element (L : in out Lists.List_Type; 106 E : in Lists.Element_Type) is 107 New_Node : Lists.Node_Pointer := new Lists.Node_Type'(E, null); 108 use type Lists.Node_Pointer; 109 begin 110 if L.First = null then -- No elements in list, so add new 111 L.First := New_Node; -- element at beginning of list. 112 else 113 L.Last.Next := New_Node; -- Add new element at end of list. 114 end if; 115 L.Last := New_Node; -- Set last-in-list pointer. 116 end Add_Element; 117 118 119end CC70C02_0; 120 121 122 --==================================================================-- 123 124 125with FC70C00_0; -- Generic list type abstraction. 126with FC70C00_1; -- Generic list operations. 127with CC70C02_0; -- Additional generic list operations. 128 129with Report; 130procedure CC70C02 is 131 132 type Points is range 0 .. 100; -- Discrete type. 133 134 package Lists_of_Points is new FC70C00_0 (Points); -- Points lists. 135 136 package Basic_Point_Ops is new -- Basic points-list ops. 137 FC70C00_1 (Lists_Of_Points); 138 139 package Points_List_Ops is new -- More points-list ops. 140 CC70C02_0 (Lists => Lists_Of_Points, 141 Basic_List_Ops => Basic_Point_Ops); 142 143 Scores : Lists_of_Points.List_Type; -- List of points. 144 145 146 -- Begin test code declarations: ----------------------- 147 148 type TC_Score_Array is array (1 .. 3) of Points; 149 150 TC_List_Values : constant TC_Score_Array := (23, 15, 0); 151 152 TC_Correct_List_Values : Boolean := False; 153 154 155 procedure TC_Initialize_List (L : in out Lists_Of_Points.List_Type) is 156 begin -- Initial list contains 3 scores 157 for I in TC_Score_Array'Range loop -- with the values 23, 15, and 0. 158 Points_List_Ops.Add_Element (L, TC_List_Values(I)); 159 end loop; 160 end TC_Initialize_List; 161 162 163 procedure TC_Verify_List (L : in out Lists_Of_Points.List_Type; 164 Expected : in TC_Score_Array; 165 OK : out Boolean) is 166 Actual : TC_Score_Array; 167 begin 168 Basic_Point_Ops.Reset (L); 169 for I in TC_Score_Array'Range loop 170 Points_List_Ops.Read_Element (L, Actual(I)); 171 end loop; 172 OK := (Actual = Expected); 173 end TC_Verify_List; 174 175 -- End test code declarations. ------------------------- 176 177 178begin 179 180 Report.Test ("CC70C02", "Check that a generic formal package may be " & 181 "passed as an actual to another formal package"); 182 183 TC_Initialize_List (Scores); 184 TC_Verify_List (Scores, TC_List_Values, TC_Correct_List_Values); 185 186 if not TC_Correct_List_Values then 187 Report.Failed ("List contains incorrect values"); 188 end if; 189 190 Report.Result; 191 192end CC70C02; 193