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comparison gcc/testsuite/ada/acats/tests/cc/cc51001.a @ 111:04ced10e8804

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gcc 7
author kono
date Fri, 27 Oct 2017 22:46:09 +0900
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1 -- CC51001.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 parameter of a generic package may be a formal
28 -- derived type. Check that the formal derived type may have an unknown
29 -- discriminant part. Check that the ancestor type in a formal derived
30 -- type definition may be a tagged type, and that the actual parameter
31 -- may be a descendant of the ancestor type. Check that the formal derived
32 -- type belongs to the derivation class rooted at the ancestor type;
33 -- specifically, that components of the ancestor type may be referenced
34 -- within the generic. Check that if a formal derived subtype is
35 -- indefinite then the actual may be either definite or indefinite.
36 --
37 -- TEST DESCRIPTION:
38 -- Define a class of tagged types with a definite root type. Extend the
39 -- root type with a discriminated component. Since discriminants of
40 -- tagged types may not have defaults, the type is indefinite.
41 --
42 -- Extend the extension with a second discriminated component, but with
43 -- a new discriminant part. Declare a generic package with a formal
44 -- derived type using the root type of the class as ancestor, and an
45 -- unknown discriminant part. Declare an operation in the generic which
46 -- accesses the common component of types in the class.
47 --
48 -- In the main program, instantiate the generic with each type in the
49 -- class and verify that the operation correctly accesses the common
50 -- component.
51 --
52 --
53 -- CHANGE HISTORY:
54 -- 06 Dec 94 SAIC ACVC 2.0
55 --
56 --!
57
58 package CC51001_0 is -- Root type for message class.
59
60 subtype Msg_String is String (1 .. 20);
61
62 type Msg_Type is tagged record -- Root type of
63 Text : Msg_String := (others => ' '); -- class (definite).
64 end record;
65
66 end CC51001_0;
67
68
69 -- No body for CC51001_0.
70
71
72 --==================================================================--
73
74
75 with CC51001_0; -- Root type for message class.
76 package CC51001_1 is -- Extensions to message class.
77
78 subtype Source_Length is Natural range 0 .. 10;
79
80 type From_Msg_Type (SLen : Source_Length) is -- Direct derivative
81 new CC51001_0.Msg_Type with record -- of root type
82 From : String (1 .. SLen); -- (indefinite).
83 end record;
84
85 subtype Dest_Length is Natural range 0 .. 10;
86
87
88
89 type To_From_Msg_Type (DLen : Dest_Length) is -- Indirect
90 new From_Msg_Type (SLen => 10) with record -- derivative of
91 To : String (1 .. DLen); -- root type
92 end record; -- (indefinite).
93
94 end CC51001_1;
95
96
97 -- No body for CC51001_1.
98
99
100 --==================================================================--
101
102
103 with CC51001_0; -- Root type for message class.
104 generic -- I/O operations for message class.
105 type Message_Type (<>) is new CC51001_0.Msg_Type with private;
106 package CC51001_2 is
107
108 -- This subprogram contains an artificial result for testing purposes:
109 -- the function returns the text of the message to the caller as a string.
110
111 function Print_Message (M : in Message_Type) return String;
112
113 -- ... Other operations.
114
115 end CC51001_2;
116
117
118 --==================================================================--
119
120
121 package body CC51001_2 is
122
123 -- The implementations of the operations below are purely artificial; the
124 -- validity of their implementations in the context of the abstraction is
125 -- irrelevant to the feature being tested.
126
127 function Print_Message (M : in Message_Type) return String is
128 begin
129 return M.Text;
130 end Print_Message;
131
132 end CC51001_2;
133
134
135 --==================================================================--
136
137
138 with CC51001_0; -- Root type for message class.
139 with CC51001_1; -- Extensions to message class.
140 with CC51001_2; -- I/O operations for message class.
141
142 with Report;
143 procedure CC51001 is
144
145 -- Instantiate for various types in the class:
146
147 package Msgs is new CC51001_2 (CC51001_0.Msg_Type); -- Definite.
148 package FMsgs is new CC51001_2 (CC51001_1.From_Msg_Type); -- Indefinite.
149 package TFMsgs is new CC51001_2 (CC51001_1.To_From_Msg_Type); -- Indefinite.
150
151
152
153 Msg : CC51001_0.Msg_Type := (Text => "This is message #001");
154 FMsg : CC51001_1.From_Msg_Type := (Text => "This is message #002",
155 SLen => 2,
156 From => "Me");
157 TFMsg : CC51001_1.To_From_Msg_Type := (Text => "This is message #003",
158 From => "You ",
159 DLen => 4,
160 To => "Them");
161
162 Expected_Msg : constant String := "This is message #001";
163 Expected_FMsg : constant String := "This is message #002";
164 Expected_TFMsg : constant String := "This is message #003";
165
166 begin
167 Report.Test ("CC51001", "Check that the formal derived type may have " &
168 "an unknown discriminant part. Check that the ancestor " &
169 "type in a formal derived type definition may be a " &
170 "tagged type, and that the actual parameter may be any " &
171 "definite or indefinite descendant of the ancestor type");
172
173 if (Msgs.Print_Message (Msg) /= Expected_Msg) then
174 Report.Failed ("Wrong result for definite root type");
175 end if;
176
177 if (FMsgs.Print_Message (FMsg) /= Expected_FMsg) then
178 Report.Failed ("Wrong result for direct indefinite derivative");
179 end if;
180
181 if (TFMsgs.Print_Message (TFMsg) /= Expected_TFMsg) then
182 Report.Failed ("Wrong result for Indirect indefinite derivative");
183 end if;
184
185 Report.Result;
186 end CC51001;