summaryrefslogtreecommitdiff
path: root/gcc/testsuite/ada/acats/tests/c4/c460a02.a
blob: 1d79d3a614ee182665162ce80782c009c0aeaf6d (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
-- C460A02.A
--
--                             Grant of Unlimited Rights
--
--     Under contracts F33600-87-D-0337, F33600-84-D-0280, MDA903-79-C-0687,
--     F08630-91-C-0015, and DCA100-97-D-0025, the U.S. Government obtained 
--     unlimited rights in the software and documentation contained herein.
--     Unlimited rights are defined in DFAR 252.227-7013(a)(19).  By making 
--     this public release, the Government intends to confer upon all 
--     recipients unlimited rights  equal to those held by the Government.  
--     These rights include rights to use, duplicate, release or disclose the 
--     released technical data and computer software in whole or in part, in 
--     any manner and for any purpose whatsoever, and to have or permit others 
--     to do so.
--
--                                    DISCLAIMER
--
--     ALL MATERIALS OR INFORMATION HEREIN RELEASED, MADE AVAILABLE OR
--     DISCLOSED ARE AS IS.  THE GOVERNMENT MAKES NO EXPRESS OR IMPLIED 
--     WARRANTY AS TO ANY MATTER WHATSOEVER, INCLUDING THE CONDITIONS OF THE
--     SOFTWARE, DOCUMENTATION OR OTHER INFORMATION RELEASED, MADE AVAILABLE 
--     OR DISCLOSED, OR THE OWNERSHIP, MERCHANTABILITY, OR FITNESS FOR A
--     PARTICULAR PURPOSE OF SAID MATERIAL.
--*
--
-- OBJECTIVE:
--      Check that if the target type of a type conversion is a general
--      access type, Program_Error is raised if the accessibility level of
--      the operand type is deeper than that of the target type. Check for
--      cases where the type conversion occurs in an instance body, and
--      the operand type is declared inside the instance or is the anonymous
--      access type of an access parameter or access discriminant.
--
-- TEST DESCRIPTION:
--      In order to satisfy accessibility requirements, the operand type must
--      be at the same or a less deep nesting level than the target type -- the
--      operand type must "live" as long as the target type. Nesting levels
--      are the run-time nestings of masters: block statements; subprogram,
--      task, and entry bodies; and accept statements. Packages are invisible
--      to accessibility rules.
--
--      This test checks for cases where the operand is a component of a
--      generic formal object, a stand-alone object, and an access parameter.
--
--      The test declares three generic units, each containing an access
--      type conversion in which the target type is a formal type:
--
--         (1) A generic package in which the operand type is the anonymous
--             access type of an access discriminant, and the conversion
--             occurs within the declarative part of the body.
--
--         (2) A generic package in which the operand type is declared within
--             the specification, and the conversion occurs within the
--             sequence of statements of the body.
--
--         (3) A generic procedure in which the operand type is the anonymous
--             access type of an access parameter, and the conversion occurs
--             within the sequence of statements.
--
--      The test verifies the following:
--
--         For (1), Program_Error is raised when the package is instantiated
--         if the actual passed through the formal object has an accessibility
--         level deeper than that of the target type passed as an actual, and
--         that no exception is raised otherwise. The exception is propagated
--         to the innermost enclosing master.
--
--         For (2), Program_Error is raised when the package is instantiated
--         if the package is instantiated at a level deeper than that of the
--         target type passed as an actual, and that no exception is raised
--         otherwise. The exception is handled within the package body.
--
--         For (3), Program_Error is raised when the instance procedure is
--         called if the actual passed through the access parameter has an
--         accessibility level deeper than that of the target type passed as
--         an actual, and that no exception is raised otherwise. The exception
--         is handled within the instance procedure.
--
-- TEST FILES:
--      The following files comprise this test:
--
--         F460A00.A
--      => C460A02.A
--
--
-- CHANGE HISTORY:
--      10 May 95   SAIC    Initial prerelease version.
--      24 Apr 96   SAIC    Changed the target type formal to be 
--                          access-to-constant; Modified code to avoid dead 
--                          variable optimization.
--
--!

with F460A00;
generic
   type Target_Type is access all F460A00.Tagged_Type;
   FObj: in out F460A00.Composite_Type;
package C460A02_0 is
   procedure Dummy; -- Needed to allow package body.
end C460A02_0;


     --==================================================================--

with Report;
package body C460A02_0 is
   Ptr: Target_Type := Target_Type(FObj.D);

   procedure Dummy is
   begin
      null;
   end Dummy;

begin
   -- Avoid optimization (dead variable removal of Ptr):
   if not Report.Equal (Ptr.C, Ptr.C) then                  -- Always false.
      Report.Failed ("Unexpected error in C460A02_0 instance");
   end if;

end C460A02_0;


     --==================================================================--


with F460A00;
generic
   type Designated_Type is private;
   type Target_Type is access all Designated_Type;
   FObj : in out Target_Type;
   FRes : in out F460A00.TC_Result_Kind;
package C460A02_1 is
   type Operand_Type is access Designated_Type;
   Ptr : Operand_Type := new Designated_Type;

   procedure Dummy; -- Needed to allow package body.
end C460A02_1;


     --==================================================================--


package body C460A02_1 is
   procedure Dummy is
   begin
      null;
   end Dummy;
begin
   FRes := F460A00.UN_Init;
   FObj := Target_Type(Ptr);
   FRes := F460A00.OK;
exception
   when Program_Error => FRes := F460A00.PE_Exception;
   when others        => FRes := F460A00.Others_Exception;
end C460A02_1;


     --==================================================================--


with F460A00;
generic
   type Designated_Type is new F460A00.Tagged_Type with private;
   type Target_Type is access constant Designated_Type;
procedure C460A02_2 (P   : access Designated_Type'Class;
                     Res : out    F460A00.TC_Result_Kind);


     --==================================================================--


with Report;
procedure C460A02_2 (P   : access Designated_Type'Class;
                     Res : out    F460A00.TC_Result_Kind) is
   Ptr : Target_Type;
begin
   Res := F460A00.UN_Init;
   Ptr := Target_Type(P);

   -- Avoid optimization (dead variable removal of Ptr):
   if not Report.Equal (Ptr.C, Ptr.C) then                  -- Always false.
      Report.Failed ("Unexpected error in C460A02_2 instance");
   end if;
   Res := F460A00.OK;
exception
   when Program_Error => Res := F460A00.PE_Exception;
   when others        => Res := F460A00.Others_Exception;
end C460A02_2;


     --==================================================================--


with F460A00;
with C460A02_0;
with C460A02_1;
with C460A02_2;

with Report;
procedure C460A02 is
begin -- C460A02.                                              -- [ Level = 1 ]

   Report.Test ("C460A02", "Run-time accessibility checks: instance " &
                "bodies. Operand type of access type conversion is "  &
                "declared inside instance or is anonymous");


   SUBTEST1:
   declare                                                     -- [ Level = 2 ]
      type AccTag_L2 is access all F460A00.Tagged_Type;
      PTag_L2    : AccTag_L2 := new F460A00.Tagged_Type;
      Operand_L2 : F460A00.Composite_Type(PTag_L2);

      Result     : F460A00.TC_Result_Kind := F460A00.UN_Init;
   begin -- SUBTEST1.

      begin                                                    -- [ Level = 3 ]
         declare                                               -- [ Level = 4 ]
            -- The accessibility level of the actual passed as the target type
            -- in Pack_OK is 2. The accessibility level of the composite actual
            -- (and thus, the level of the anonymous type of the access
            -- discriminant, which is the same as that of the containing 
            -- object) is also 2. Therefore, the access type conversion in 
            -- Pack_OK does not raise an exception upon instantiation:

            package Pack_OK is new C460A02_0 
              (Target_Type => AccTag_L2, FObj => Operand_L2);
         begin
            Result := F460A00.OK;                           -- Expected result.
         end;
      exception
         when Program_Error => Result := F460A00.PE_Exception;
         when others        => Result := F460A00.Others_Exception;
      end;

      F460A00.TC_Check_Results (Result, F460A00.OK, "SUBTEST #1");

   end SUBTEST1;



   SUBTEST2:
   declare                                                     -- [ Level = 2 ]
      type AccTag_L2 is access all F460A00.Tagged_Type;
      PTag_L2 : AccTag_L2 := new F460A00.Tagged_Type;

      Result  : F460A00.TC_Result_Kind := F460A00.UN_Init;
   begin -- SUBTEST2.

      declare                                                  -- [ Level = 3 ]
         Operand_L3 : F460A00.Composite_Type(PTag_L2);
      begin
         declare                                               -- [ Level = 4 ]
            -- The accessibility level of the actual passed as the target type
            -- in Pack_PE is 2. The accessibility level of the composite actual
            -- (and thus, the level of the anonymous type of the access
            -- discriminant, which is the same as that of the containing 
            -- object) is 3. Therefore, the access type conversion in Pack_PE 
            -- propagates Program_Error upon instantiation:

            package Pack_PE is new C460A02_0 (AccTag_L2, Operand_L3);
         begin
            Result := F460A00.OK;
         end;
      exception
         when Program_Error => Result := F460A00.PE_Exception;       
                                                          -- Expected result.
         when others        => Result := F460A00.Others_Exception;
      end;

      F460A00.TC_Check_Results (Result, F460A00.PE_Exception, "SUBTEST #2");

   end SUBTEST2;



   SUBTEST3:
   declare                                                     -- [ Level = 2 ]
      Result : F460A00.TC_Result_Kind := F460A00.UN_Init;
   begin -- SUBTEST3.

      declare                                                  -- [ Level = 3 ]
         type AccArr_L3 is access all F460A00.Array_Type;
         Target: AccArr_L3;

         -- The accessibility level of the actual passed as the target type
         -- in Pack_OK is 3. The accessibility level of the operand type is
         -- that of the instance, which is also 3. Therefore, the access type
         -- conversion in Pack_OK does not raise an exception upon
         -- instantiation. If an exception is (incorrectly) raised, it is 
         -- handled within the instance:

         package Pack_OK is new C460A02_1
           (Designated_Type => F460A00.Array_Type,
            Target_Type     => AccArr_L3,
            FObj            => Target,
            FRes            => Result);
      begin
         null;
      end;

      F460A00.TC_Check_Results (Result, F460A00.OK, "SUBTEST #3");

   exception
      when Program_Error =>
         Report.Failed ("SUBTEST #3: Program_Error incorrectly propagated");
      when others        =>
         Report.Failed ("SUBTEST #3: Unexpected exception propagated");
   end SUBTEST3;



   SUBTEST4:
   declare                                                     -- [ Level = 2 ]
      Result : F460A00.TC_Result_Kind := F460A00.UN_Init;
   begin -- SUBTEST4.

      declare                                                  -- [ Level = 3 ]
         Target: F460A00.AccArr_L0;

         -- The accessibility level of the actual passed as the target type
         -- in Pack_PE is 0. The accessibility level of the operand type is
         -- that of the instance, which is 3. Therefore, the access type
         -- conversion in Pack_PE raises Program_Error upon instantiation.
         -- The exception is handled within the instance:

         package Pack_PE is new C460A02_1
           (Designated_Type => F460A00.Array_Type,
            Target_Type     => F460A00.AccArr_L0,
            FObj            => Target,
            FRes            => Result);
      begin
         null;
      end;

      F460A00.TC_Check_Results (Result, F460A00.PE_Exception, "SUBTEST #4");

   exception
      when Program_Error =>
         Report.Failed ("SUBTEST #4: Program_Error incorrectly raised");
      when others        =>
         Report.Failed ("SUBTEST #4: Unexpected exception raised");
   end SUBTEST4;



   SUBTEST5:
   declare                                                     -- [ Level = 2 ]
      Result : F460A00.TC_Result_Kind := F460A00.UN_Init;
   begin -- SUBTEST5.

      declare                                                  -- [ Level = 3 ]
         -- The instantiation of C460A02_2 should NOT result in any
         -- exceptions.

         procedure Proc is new C460A02_2 (F460A00.Tagged_Type,
                                          F460A00.AccTag_L0);
      begin
         -- The accessibility level of the actual passed to Proc is 0. The
         -- accessibility level of the actual passed as the target type is
         -- also 0. Therefore, the access type conversion in Proc does not
         -- raise an exception when the subprogram is called. If an exception
         -- is (incorrectly) raised, it is handled within the subprogram:

         Proc (F460A00.PTagClass_L0, Result);
      end;

      F460A00.TC_Check_Results (Result, F460A00.OK, "SUBTEST #5");

   exception
      when Program_Error =>
         Report.Failed ("SUBTEST #5: Program_Error incorrectly raised");
      when others        =>
         Report.Failed ("SUBTEST #5: Unexpected exception raised");
   end SUBTEST5;



   SUBTEST6:
   declare                                                     -- [ Level = 2 ]
      Result : F460A00.TC_Result_Kind := F460A00.UN_Init;
   begin -- SUBTEST6.

      declare                                                  -- [ Level = 3 ]
         -- The instantiation of C460A02_2 should NOT result in any
         -- exceptions.

         procedure Proc is new C460A02_2 (F460A00.Tagged_Type,
                                          F460A00.AccTag_L0);
      begin
         -- In the call to (instantiated) procedure Proc, the first actual
         -- parameter is an allocator. Its accessibility level is that of 
         -- the level of execution of Proc, which is 3. The accessibility 
         -- level of the actual passed as the target type is 0.  Therefore, 
         -- the access type conversion in Proc raises Program_Error when the
         -- subprogram is called. The exception is handled within the
         -- subprogram:

         Proc (new F460A00.Tagged_Type, Result);
      end;

      F460A00.TC_Check_Results (Result, F460A00.PE_Exception, "SUBTEST #6");

   exception
      when Program_Error =>
         Report.Failed ("SUBTEST #6: Program_Error incorrectly raised");
      when others        =>
         Report.Failed ("SUBTEST #6: Unexpected exception raised");
   end SUBTEST6;

   Report.Result;

end C460A02;