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