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comparison gcc/testsuite/ada/acats/tests/c4/c460006.a @ 111:04ced10e8804

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author kono
date Fri, 27 Oct 2017 22:46:09 +0900
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1 -- C460006.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 view conversion to a tagged type is permitted in the
28 -- prefix of a selected component, an object renaming declaration, and
29 -- (if the operand is a variable) on the left side of an assignment
30 -- statement. Check that such a renaming or assignment does not change
31 -- the tag of the operand.
32 --
33 -- Check that, for a view conversion of a tagged type, each
34 -- nondiscriminant component of the new view denotes the matching
35 -- component of the operand object. Check that reading the value of the
36 -- view yields the result of converting the value of the operand object
37 -- to the target subtype.
38 --
39 -- TEST DESCRIPTION:
40 -- The fact that the tag of an object is not changed is verified by
41 -- making calls to primitive operations which in turn make (re)dispatching
42 -- calls, and confirming that the proper bodies are executed.
43 --
44 -- Selected components are checked in three contexts: as the object name
45 -- in an object renaming declaration, as the left operand of an inequality
46 -- operation, and as the left side of an assignment statement.
47 --
48 -- View conversions of an object of a 2nd level type extension are
49 -- renamed as objects of an ancestor type and of a class-wide type. In
50 -- one case the operand of the conversion is itself a renaming of an
51 -- object.
52 --
53 -- View conversions of an object of a 2nd level type extension are
54 -- checked for equality with record aggregates of various ancestor types.
55 -- In one case, the view conversion is to a class-wide type, and it is
56 -- checked for equality with the result of a class-wide function with
57 -- the following structure:
58 --
59 -- function F return T'Class is
60 -- A : DDT := Expected_Value;
61 -- X : T'Class := T(A);
62 -- begin
63 -- return X;
64 --
65 -- end F;
66 --
67 -- ...
68 --
69 -- Var : DDT := Expected_Value;
70 --
71 -- if (T'Class(Var) /= F) then -- Condition should yield FALSE.
72 -- FAIL;
73 -- end if;
74 --
75 -- The view conversion to which X is initialized does not affect the
76 -- value or tag of the operand; the tag of X is that of type DDT (not T),
77 -- and the components are those of A. The result of this function
78 -- should equal the value of an object of type DDT initialized to the
79 -- same value as F.A.
80 --
81 -- To check that assignment to a view conversion does not change the tag
82 -- of the operand, an assignment is made to a conversion of an object,
83 -- and the object is then passed as an actual to a dispatching operation.
84 -- Conversions to both specific and class-wide types are checked.
85 --
86 --
87 -- CHANGE HISTORY:
88 -- 20 Jul 95 SAIC Initial prerelease version.
89 -- 24 Apr 96 SAIC Added type conversions.
90 --
91 --!
92
93 package C460006_0 is
94
95 type Call_ID_Kind is (None, Parent_Outer, Parent_Inner,
96 Child_Outer, Child_Inner,
97 Grandchild_Outer, Grandchild_Inner);
98
99 type Root_Type is abstract tagged record
100 First_Call : Call_ID_Kind := None;
101 Second_Call : Call_ID_Kind := None;
102 end record;
103
104 procedure Inner_Proc (X : in out Root_Type) is abstract;
105 procedure Outer_Proc (X : in out Root_Type) is abstract;
106
107 end C460006_0;
108
109
110 --==================================================================--
111
112
113 package C460006_0.C460006_1 is
114
115 type Parent_Type is new Root_Type with record
116 C1 : Integer := 0;
117 end record;
118
119 procedure Inner_Proc (X : in out Parent_Type);
120 procedure Outer_Proc (X : in out Parent_Type);
121
122 end C460006_0.C460006_1;
123
124
125 --==================================================================--
126
127
128 package body C460006_0.C460006_1 is
129
130 procedure Inner_Proc (X : in out Parent_Type) is
131 begin
132 X.Second_Call := Parent_Inner;
133 end Inner_Proc;
134
135 -------------------------------------------------
136 procedure Outer_Proc (X : in out Parent_Type) is
137 begin
138 X.First_Call := Parent_Outer;
139 Inner_Proc ( Parent_Type'Class(X) );
140 end Outer_Proc;
141
142 end C460006_0.C460006_1;
143
144
145 --==================================================================--
146
147
148 package C460006_0.C460006_1.C460006_2 is
149
150 type Child_Type is new Parent_Type with record
151 C2 : String(1 .. 5) := "-----";
152 end record;
153
154 procedure Inner_Proc (X : in out Child_Type);
155 procedure Outer_Proc (X : in out Child_Type);
156
157 end C460006_0.C460006_1.C460006_2;
158
159
160 --==================================================================--
161
162
163 package body C460006_0.C460006_1.C460006_2 is
164
165 procedure Inner_Proc (X : in out Child_Type) is
166 begin
167 X.Second_Call := Child_Inner;
168 end Inner_Proc;
169
170 -------------------------------------------------
171 procedure Outer_Proc (X : in out Child_Type) is
172 begin
173 X.First_Call := Child_Outer;
174 Inner_Proc ( Parent_Type'Class(X) );
175 end Outer_Proc;
176
177 end C460006_0.C460006_1.C460006_2;
178
179
180 --==================================================================--
181
182
183 package C460006_0.C460006_1.C460006_2.C460006_3 is
184
185 type Grandchild_Type is new Child_Type with record
186 C3: String(1 .. 5) := "-----";
187 end record;
188
189 procedure Inner_Proc (X : in out Grandchild_Type);
190 procedure Outer_Proc (X : in out Grandchild_Type);
191
192
193 function ClassWide_Func return Parent_Type'Class;
194
195
196 Grandchild_Value : constant Grandchild_Type := (First_Call => None,
197 Second_Call => None,
198 C1 => 15,
199 C2 => "Hello",
200 C3 => "World");
201
202 end C460006_0.C460006_1.C460006_2.C460006_3;
203
204
205 --==================================================================--
206
207
208 package body C460006_0.C460006_1.C460006_2.C460006_3 is
209
210 procedure Inner_Proc (X : in out Grandchild_Type) is
211 begin
212 X.Second_Call := Grandchild_Inner;
213 end Inner_Proc;
214
215 -------------------------------------------------
216 procedure Outer_Proc (X : in out Grandchild_Type) is
217 begin
218 X.First_Call := Grandchild_Outer;
219 Inner_Proc ( Parent_Type'Class(X) );
220 end Outer_Proc;
221
222 -------------------------------------------------
223 function ClassWide_Func return Parent_Type'Class is
224 A : Grandchild_Type := Grandchild_Value;
225 X : Parent_Type'Class := Parent_Type(A); -- Value of X is still that of A.
226 begin
227 return X;
228 end ClassWide_Func;
229
230 end C460006_0.C460006_1.C460006_2.C460006_3;
231
232
233 --==================================================================--
234
235
236 with C460006_0.C460006_1.C460006_2.C460006_3;
237
238 with Report;
239 procedure C460006 is
240
241 package Root_Package renames C460006_0;
242 package Parent_Package renames C460006_0.C460006_1;
243 package Child_Package renames C460006_0.C460006_1.C460006_2;
244 package Grandchild_Package renames C460006_0.C460006_1.C460006_2.C460006_3;
245
246 begin
247 Report.Test ("C460006", "Check that a view conversion to a tagged type " &
248 "is permitted in the prefix of a selected component, an " &
249 "object renaming declaration, and (if the operand is a " &
250 "variable) on the left side of an assignment statement. " &
251 "Check that such a renaming or assignment does not change " &
252 " the tag of the operand");
253
254
255 --
256 -- Check conversion as prefix of selected component:
257 --
258
259 Selected_Component_Subtest:
260 declare
261 use Root_Package, Parent_Package, Child_Package, Grandchild_Package;
262
263 Var : Grandchild_Type := Grandchild_Value;
264 CW_Var : Parent_Type'Class := Var;
265
266 Ren : Integer renames Parent_Type(Var).C1;
267
268 begin
269 if Ren /= 15 then
270 Report.Failed ("Wrong value: selected component in renaming");
271 end if;
272
273 if Child_Type(Var).C2 /= "Hello" then
274 Report.Failed ("Wrong value: selected component in IF");
275 end if;
276
277 Grandchild_Type(CW_Var).C3(2..4) := "eir";
278 if CW_Var /= Parent_Type'Class
279 (Grandchild_Type'(None, None, 15, "Hello", "Weird"))
280 then
281 Report.Failed ("Wrong value: selected component in assignment");
282 end if;
283 end Selected_Component_Subtest;
284
285
286 --
287 -- Check conversion in object renaming:
288 --
289
290 Object_Renaming_Subtest:
291 declare
292 use Root_Package, Parent_Package, Child_Package, Grandchild_Package;
293
294 Var : Grandchild_Type := Grandchild_Value;
295 Ren1 : Parent_Type renames Parent_Type(Var);
296 Ren2 : Child_Type renames Child_Type(Var);
297 Ren3 : Parent_Type'Class renames Parent_Type'Class(Var);
298 Ren4 : Parent_Type renames Parent_Type(Ren2); -- Rename of rename.
299 begin
300 Outer_Proc (Ren1);
301 if Ren1 /= (Parent_Outer, Grandchild_Inner, 15) then
302 Report.Failed ("Value or tag not preserved by object renaming: Ren1");
303 end if;
304
305 Outer_Proc (Ren2);
306 if Ren2 /= (Child_Outer, Grandchild_Inner, 15, "Hello") then
307 Report.Failed ("Value or tag not preserved by object renaming: Ren2");
308 end if;
309
310 Outer_Proc (Ren3);
311 if Ren3 /= Parent_Type'Class
312 (Grandchild_Type'(Grandchild_Outer,
313 Grandchild_Inner,
314 15,
315 "Hello",
316 "World"))
317 then
318 Report.Failed ("Value or tag not preserved by object renaming: Ren3");
319 end if;
320
321 Outer_Proc (Ren4);
322 if Ren4 /= (Parent_Outer, Grandchild_Inner, 15) then
323 Report.Failed ("Value or tag not preserved by object renaming: Ren4");
324 end if;
325 end Object_Renaming_Subtest;
326
327
328 --
329 -- Check reading view conversion, and conversion as left side of assignment:
330 --
331
332 View_Conversion_Subtest:
333 declare
334 use Root_Package, Parent_Package, Child_Package, Grandchild_Package;
335
336 Var : Grandchild_Type := Grandchild_Value;
337 Specific : Child_Type;
338 ClassWide : Parent_Type'Class := Var; -- Grandchild_Type tag.
339 begin
340 if Parent_Type(Var) /= (None, None, 15) then
341 Report.Failed ("View has wrong value: #1");
342 end if;
343
344 if Child_Type(Var) /= (None, None, 15, "Hello") then
345 Report.Failed ("View has wrong value: #2");
346 end if;
347
348 if Parent_Type'Class(Var) /= ClassWide_Func then
349 Report.Failed ("Upward view conversion did not preserve " &
350 "extension's components");
351 end if;
352
353
354 Parent_Type(Specific) := (None, None, 26); -- Assign to view.
355 Outer_Proc (Specific); -- Call dispatching op.
356
357 if Specific /= (Child_Outer, Child_Inner, 26, "-----") then
358 Report.Failed ("Value or tag not preserved by assignment: Specific");
359 end if;
360
361
362 Parent_Type(ClassWide) := (None, None, 44); -- Assign to view.
363 Outer_Proc (ClassWide); -- Call dispatching op.
364
365 if ClassWide /= Parent_Type'Class
366 (Grandchild_Type'(Grandchild_Outer,
367 Grandchild_Inner,
368 44,
369 "Hello",
370 "World"))
371 then
372 Report.Failed ("Value or tag not preserved by assignment: ClassWide");
373 end if;
374 end View_Conversion_Subtest;
375
376 Report.Result;
377
378 end C460006;