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comparison gcc/testsuite/ada/acats/tests/c3/c390010.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 -- C390010.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 if S is a subtype of a tagged type T, and if S is
28 -- constrained, then the allowable values of S'Class are only those
29 -- that, when converted to T, belong to S.
30 --
31 -- TEST DESCRIPTION:
32 -- This test defines a small tagged hierarchy of discriminated tagged
33 -- records, and constrained subtypes of those tagged record types.
34 -- It then uses access to the classwide of the constrained subtype
35 -- to check the objective.
36 --
37 --
38 -- CHANGE HISTORY:
39 -- 09 APR 96 SAIC Initial version
40 -- 03 NOV 96 SAIC Revised for 2.1 release
41 -- 31 DEC 97 EDS Restored use of intermediate access variable
42 -- to eliminate raising of Program_Error
43 -- 13 SEP 99 RLB Repaired previous change to avoid premature
44 -- subtype check.
45 -- 28 JUN 02 RLB Added pragma Elaborate_All (Report);.
46 --!
47
48 ----------------------------------------------------------------- C390010_0
49
50 with Report; pragma Elaborate_All (Report);
51 package C390010_0 is
52
53 -- the defined subprograms will allow checking the placement of
54 -- constraint_checks
55
56 -- define a discriminated tagged type, and a constrained subtype of
57 -- that type:
58
59 type Discr_Tag_Record( Disc: Boolean ) is tagged record
60 FieldA : Character := 'A';
61 case Disc is
62 when True => FieldB : Character := 'B';
63 when False => FieldC : Character := 'C';
64 end case;
65 end record;
66
67 procedure Dispatching_Op( DTO : in out Discr_Tag_Record );
68
69 Authentic : Boolean := Report.Ident_Bool( True );
70
71 subtype True_Record is Discr_Tag_Record( Authentic );
72
73
74 -- derive a type, "passing through" one discriminant, adding one
75 -- discriminant, and a constrained subtype of THAT type:
76
77 type Derived_Record( Disc1, Disc2: Boolean ) is
78 new Discr_Tag_Record( Disc1 ) with record
79 FieldD : Character := 'D';
80 case Disc2 is
81 when True => FieldE : Character := 'E';
82 when False => FieldF : Character := 'F';
83 end case;
84 end record;
85
86 procedure Dispatching_Op( DR : in out Derived_Record );
87
88 subtype True_True_Derived is Derived_Record( Authentic, Authentic );
89
90
91 -- now, define an access to classwide type, using the classwide from the
92 -- constrained subtype of the root (or parent) type:
93
94 type Subtype_Parent_Class_Access is access all True_Record'Class;
95 type Parent_Class_Access is access all Discr_Tag_Record'Class;
96
97 procedure PCW_Op( SPCA : in Subtype_Parent_Class_Access );
98
99 end C390010_0;
100
101 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- C390010_0
102
103 with Report;
104 with TCTouch;
105 package body C390010_0 is
106
107 procedure Dispatching_Op( DTO : in out Discr_Tag_Record ) is
108 begin
109 TCTouch.Touch('1'); --------------------------------------------------- 1
110 if DTO.Disc then
111 TCTouch.Touch(DTO.FieldB); ------------------------------------------ B
112 else
113 TCTouch.Touch(DTO.FieldC); ------------------------------------------ C
114 end if;
115 end Dispatching_Op;
116
117
118 procedure Dispatching_Op( DR : in out Derived_Record ) is
119 begin
120 TCTouch.Touch('2'); --------------------------------------------------- 2
121 if DR.Disc1 then
122 TCTouch.Touch(DR.FieldB); ------------------------------------------ B
123 else
124 TCTouch.Touch(DR.FieldC); ------------------------------------------ C
125 end if;
126 if DR.Disc2 then
127 TCTouch.Touch(DR.FieldE); ------------------------------------------ E
128 else
129 TCTouch.Touch(DR.FieldF); ------------------------------------------ F
130 end if;
131 end Dispatching_Op;
132
133 procedure PCW_Op( SPCA : in Subtype_Parent_Class_Access ) is
134 begin
135
136 -- the following line is the "heart" of this test, objects of all types
137 -- covered by the classwide type will be passed to this subprogram in
138 -- the execution of the test.
139 if SPCA.Disc then
140 TCTouch.Touch(SPCA.FieldB); ------------------------------------------ B
141 else
142 TCTouch.Touch(SPCA.FieldC); ------------------------------------------ C
143 end if;
144
145 Dispatching_Op( SPCA.all ); -- check that this dispatches correctly,
146 -- with discriminants correctly represented
147
148 end PCW_Op;
149
150 end C390010_0;
151
152 ------------------------------------------------------------------- C390010
153
154 with Report;
155 with TCTouch;
156 with C390010_0;
157 procedure C390010 is
158
159 package CP renames C390010_0;
160
161 procedure Check_Element( Item : access CP.Discr_Tag_Record'Class ) is
162 begin
163
164 -- the implicit conversion from the general access parameter to the more
165 -- constrained subtype access type in the following call should cause
166 -- Constraint_Error in the cases where the object is not correctly
167 -- constrained
168
169 CP.PCW_Op( Item.all'Access );
170
171 exception
172 when Constraint_Error => TCTouch.Touch('X'); -------------------------- X
173 when others => Report.Failed("Unanticipated exception in Check_Element");
174
175 end Check_Element;
176
177 An_Item : CP.Parent_Class_Access;
178
179 begin -- Main test procedure.
180
181 Report.Test ("C390010", "Check that if S is a subtype of a tagged type " &
182 "T, and if S is constrained, then the allowable " &
183 "values of S'Class are only those that, when " &
184 "converted to T, belong to S" );
185
186 An_Item := new CP.Discr_Tag_Record(True);
187 Check_Element( An_Item );
188 TCTouch.Validate("B1B","Case 1");
189
190 An_Item := new CP.Discr_Tag_Record(False);
191 Check_Element( An_Item );
192 TCTouch.Validate("X","Case 2");
193
194 An_Item := new CP.True_Record;
195 Check_Element( An_Item );
196 TCTouch.Validate("B1B","Case 3");
197
198 An_Item := new CP.Derived_Record(False, False);
199 Check_Element( An_Item );
200 TCTouch.Validate("X","Case 4");
201
202 An_Item := new CP.Derived_Record(False, True);
203 Check_Element( An_Item );
204 TCTouch.Validate("X","Case 5");
205
206 An_Item := new CP.Derived_Record(True, False);
207 Check_Element( An_Item );
208 TCTouch.Validate("B2BF","Case 6");
209
210 An_Item := new CP.True_True_Derived;
211 Check_Element( An_Item );
212 TCTouch.Validate("B2BE","Case 7");
213
214 Report.Result;
215
216 end C390010;