gcc/testsuite/ada/acats/tests/cb/cb41001.a

   1 -- CB41001.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 the 'Identity attribute returns the unique identity of an
  28 --      exception. Check that the Raise_Exception procedure can raise an
  29 --      exception that is specified through the use of the 'Identity attribute,
  30 --      and that Reraise_Occurrence can re-raise an exception occurrence
  31 --      using an exception choice parameter.
  32 --
  33 -- TEST DESCRIPTION:
  34 --      This test uses the capability of the 'Identity attribute, which
  35 --      returns the unique identity of an exception, as an Exception_Id
  36 --      result.  This result is used as an input parameter to the procedure
  37 --      Raise_Exception.  The exception that results is handled, propagated
  38 --      using the Reraise_Occurrence procedure, and handled again.
  39 --      The above actions are performed for both a user-defined and a
  40 --      predefined exception.
  41 --
  42 --
  43 -- CHANGE HISTORY:
  44 --      06 Dec 94   SAIC    ACVC 2.0
  45 --      11 Nov 96   SAIC    ACVC 2.1: Modified Propagate_User_Exception.
  46 --
  47 --!
  48
  49 with Report;
  50 with Ada.Exceptions;
  51
  52 procedure CB41001 is
  53
  54 begin
  55
  56    Report.Test ("CB41001", "Check that the 'Identity attribute returns " &
  57                            "the unique identity of an exception. Check " &
  58                            "that the 'Identity attribute is of type "    &
  59                            "Exception_Id.  Check that the "              &
  60                            "Raise_Exception procedure can raise an "     &
  61                            "exception that is specified through the "    &
  62                            "use of the 'Identity attribute");
  63    Test_Block:
  64    declare
  65
  66       Check_Points : constant := 5;
  67
  68       type Check_Point_Array_Type is array (1..Check_Points) of Boolean;
  69
  70       -- Global array used to track the processing path through the test.
  71       TC_Check_Points : Check_Point_Array_Type := (others => False);
  72
  73       A_User_Defined_Exception  : Exception;
  74       An_Exception_ID           : Ada.Exceptions.Exception_Id :=
  75                                     Ada.Exceptions.Null_Id;
  76
  77       procedure Propagate_User_Exception is
  78          Hidden_Exception : Exception;
  79       begin
  80          -- Use the 'Identity function to store the unique identity of a
  81          -- user defined exception into a variable of type Exception_Id.
  82
  83          An_Exception_ID := A_User_Defined_Exception'Identity;
  84
  85          -- Raise this user defined exception using the result of the
  86          -- 'Identity attribute.
  87
  88          Ada.Exceptions.Raise_Exception(E => An_Exception_Id);
  89
  90          Report.Failed("User defined exception not raised by " &
  91                        "procedure Propagate_User_Exception");
  92
  93       exception
  94          when Proc_Excpt : A_User_Defined_Exception => -- Expected exception.
  95             begin
  96
  97                -- By raising a different exception at this point, the
  98                -- information associated with A_User_Defined_Exception must
  99                -- be correctly stacked internally.
 100
 101                Ada.Exceptions.Raise_Exception(Hidden_Exception'Identity);
 102                Report.Failed("Hidden_Exception not raised by " &
 103                              "procedure Propagate_User_Exception");
 104             exception
 105                when others =>
 106                   TC_Check_Points(1) := True;
 107
 108                   -- Reraise the original exception, which will be propagated
 109                   -- outside the scope of this procedure.
 110
 111                   Ada.Exceptions.Reraise_Occurrence(Proc_Excpt);
 112                   Report.Failed("User defined exception not reraised");
 113
 114             end;
 115
 116          when others =>
 117             Report.Failed("Unexpected exception raised by " &
 118                           "Procedure Propagate_User_Exception");
 119       end Propagate_User_Exception;
 120
 121    begin
 122
 123       User_Exception_Block:
 124       begin
 125          -- Call procedure to raise, handle, and reraise a user defined
 126          -- exception.
 127          Propagate_User_Exception;
 128
 129          Report.Failed("User defined exception not propagated from " &
 130                        "procedure Propagate_User_Exception");
 131
 132       exception
 133          when A_User_Defined_Exception => -- Expected exception.
 134             TC_Check_Points(2) := True;
 135          when others =>
 136             Report.Failed
 137               ("Unexpected exception handled in User_Exception_Block");
 138       end User_Exception_Block;
 139
 140
 141       Predefined_Exception_Block:
 142       begin
 143
 144          Inner_Block:
 145          begin
 146
 147             begin
 148                -- Use the 'Identity attribute as an input parameter to the
 149                -- Raise_Exception procedure.
 150
 151                Ada.Exceptions.Raise_Exception(Constraint_Error'Identity);
 152                Report.Failed("Constraint_Error not raised in Inner_Block");
 153
 154             exception
 155                when Excpt : Constraint_Error =>  -- Expected exception.
 156                   TC_Check_Points(3) := True;
 157
 158                   -- Reraise the exception.
 159                   Ada.Exceptions.Reraise_Occurrence(X => Excpt);
 160                   Report.Failed("Predefined exception not raised from " &
 161                                 "within the exception handler - 1");
 162                when others =>
 163                   Report.Failed("Incorrect result from attempt to raise " &
 164                                 "Constraint_Error using the 'Identity "   &
 165                                 "attribute - 1");
 166             end;
 167
 168             Report.Failed("Constraint_Error not reraised in Inner_Block");
 169
 170          exception
 171             when Block_Excpt : Constraint_Error =>  -- Expected exception.
 172                TC_Check_Points(4) := True;
 173
 174                -- Reraise the exception in a scope where the exception
 175                -- was not originally raised.
 176
 177                Ada.Exceptions.Reraise_Occurrence(X => Block_Excpt);
 178                Report.Failed("Predefined exception not raised from " &
 179                              "within the exception handler - 2");
 180
 181             when others =>
 182                Report.Failed("Incorrect result from attempt to raise " &
 183                              "Constraint_Error using the 'Identity "   &
 184                              "attribute - 2");
 185          end Inner_Block;
 186
 187          Report.Failed("Exception not propagated from Inner_Block");
 188
 189       exception
 190          when Constraint_Error =>  -- Expected exception.
 191             TC_Check_Points(5) := True;
 192          when others =>
 193             Report.Failed("Unexpected exception handled after second " &
 194                           "reraise of Constraint_Error");
 195       end Predefined_Exception_Block;
 196
 197
 198       -- Verify the processing path taken through the test.
 199
 200       for i in 1..Check_Points loop
 201          if not TC_Check_Points(i) then
 202             Report.Failed("Incorrect processing path taken through test, " &
 203                           "didn't pass check point #" & Integer'Image(i));
 204          end if;
 205       end loop;
 206
 207    exception
 208       when others => Report.Failed ("Exception raised in Test_Block");
 209    end Test_Block;
 210
 211    Report.Result;
 212
 213 end CB41001;