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1 720 jeremybenn
-- CB41001.A
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--
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--                             Grant of Unlimited Rights
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--
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--     Under contracts F33600-87-D-0337, F33600-84-D-0280, MDA903-79-C-0687,
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--     F08630-91-C-0015, and DCA100-97-D-0025, the U.S. Government obtained
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--     unlimited rights in the software and documentation contained herein.
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--     Unlimited rights are defined in DFAR 252.227-7013(a)(19).  By making
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--     this public release, the Government intends to confer upon all
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--     recipients unlimited rights  equal to those held by the Government.
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--     These rights include rights to use, duplicate, release or disclose the
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--     released technical data and computer software in whole or in part, in
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--     any manner and for any purpose whatsoever, and to have or permit others
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--     to do so.
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--
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--                                    DISCLAIMER
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--
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--     ALL MATERIALS OR INFORMATION HEREIN RELEASED, MADE AVAILABLE OR
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--     DISCLOSED ARE AS IS.  THE GOVERNMENT MAKES NO EXPRESS OR IMPLIED
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--     WARRANTY AS TO ANY MATTER WHATSOEVER, INCLUDING THE CONDITIONS OF THE
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--     SOFTWARE, DOCUMENTATION OR OTHER INFORMATION RELEASED, MADE AVAILABLE
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--     OR DISCLOSED, OR THE OWNERSHIP, MERCHANTABILITY, OR FITNESS FOR A
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--     PARTICULAR PURPOSE OF SAID MATERIAL.
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--*
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--
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-- OBJECTIVE:
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--      Check that the 'Identity attribute returns the unique identity of an
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--      exception. Check that the Raise_Exception procedure can raise an
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--      exception that is specified through the use of the 'Identity attribute,
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--      and that Reraise_Occurrence can re-raise an exception occurrence
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--      using an exception choice parameter.
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--
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-- TEST DESCRIPTION:
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--      This test uses the capability of the 'Identity attribute, which
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--      returns the unique identity of an exception, as an Exception_Id
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--      result.  This result is used as an input parameter to the procedure
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--      Raise_Exception.  The exception that results is handled, propagated
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--      using the Reraise_Occurrence procedure, and handled again.
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--      The above actions are performed for both a user-defined and a
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--      predefined exception.
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--
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--
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-- CHANGE HISTORY:
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--      06 Dec 94   SAIC    ACVC 2.0
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--      11 Nov 96   SAIC    ACVC 2.1: Modified Propagate_User_Exception.
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--
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--!
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with Report;
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with Ada.Exceptions;
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procedure CB41001 is
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begin
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   Report.Test ("CB41001", "Check that the 'Identity attribute returns " &
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                           "the unique identity of an exception. Check " &
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                           "that the 'Identity attribute is of type "    &
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                           "Exception_Id.  Check that the "              &
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                           "Raise_Exception procedure can raise an "     &
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                           "exception that is specified through the "    &
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                           "use of the 'Identity attribute");
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   Test_Block:
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   declare
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      Check_Points : constant := 5;
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      type Check_Point_Array_Type is array (1..Check_Points) of Boolean;
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      -- Global array used to track the processing path through the test.
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      TC_Check_Points : Check_Point_Array_Type := (others => False);
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      A_User_Defined_Exception  : Exception;
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      An_Exception_ID           : Ada.Exceptions.Exception_Id :=
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                                    Ada.Exceptions.Null_Id;
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      procedure Propagate_User_Exception is
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         Hidden_Exception : Exception;
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      begin
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         -- Use the 'Identity function to store the unique identity of a
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         -- user defined exception into a variable of type Exception_Id.
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         An_Exception_ID := A_User_Defined_Exception'Identity;
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         -- Raise this user defined exception using the result of the
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         -- 'Identity attribute.
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         Ada.Exceptions.Raise_Exception(E => An_Exception_Id);
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         Report.Failed("User defined exception not raised by " &
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                       "procedure Propagate_User_Exception");
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      exception
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         when Proc_Excpt : A_User_Defined_Exception => -- Expected exception.
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            begin
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               -- By raising a different exception at this point, the
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               -- information associated with A_User_Defined_Exception must
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               -- be correctly stacked internally.
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               Ada.Exceptions.Raise_Exception(Hidden_Exception'Identity);
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               Report.Failed("Hidden_Exception not raised by " &
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                             "procedure Propagate_User_Exception");
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            exception
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               when others =>
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                  TC_Check_Points(1) := True;
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                  -- Reraise the original exception, which will be propagated
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                  -- outside the scope of this procedure.
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                  Ada.Exceptions.Reraise_Occurrence(Proc_Excpt);
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                  Report.Failed("User defined exception not reraised");
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            end;
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         when others =>
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            Report.Failed("Unexpected exception raised by " &
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                          "Procedure Propagate_User_Exception");
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      end Propagate_User_Exception;
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   begin
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      User_Exception_Block:
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      begin
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         -- Call procedure to raise, handle, and reraise a user defined
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         -- exception.
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         Propagate_User_Exception;
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         Report.Failed("User defined exception not propagated from " &
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                       "procedure Propagate_User_Exception");
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      exception
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         when A_User_Defined_Exception => -- Expected exception.
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            TC_Check_Points(2) := True;
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         when others =>
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            Report.Failed
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              ("Unexpected exception handled in User_Exception_Block");
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      end User_Exception_Block;
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      Predefined_Exception_Block:
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      begin
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         Inner_Block:
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         begin
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            begin
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               -- Use the 'Identity attribute as an input parameter to the
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               -- Raise_Exception procedure.
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               Ada.Exceptions.Raise_Exception(Constraint_Error'Identity);
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               Report.Failed("Constraint_Error not raised in Inner_Block");
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            exception
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               when Excpt : Constraint_Error =>  -- Expected exception.
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                  TC_Check_Points(3) := True;
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                  -- Reraise the exception.
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                  Ada.Exceptions.Reraise_Occurrence(X => Excpt);
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                  Report.Failed("Predefined exception not raised from " &
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                                "within the exception handler - 1");
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               when others =>
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                  Report.Failed("Incorrect result from attempt to raise " &
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                                "Constraint_Error using the 'Identity "   &
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                                "attribute - 1");
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            end;
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            Report.Failed("Constraint_Error not reraised in Inner_Block");
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         exception
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            when Block_Excpt : Constraint_Error =>  -- Expected exception.
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               TC_Check_Points(4) := True;
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               -- Reraise the exception in a scope where the exception
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               -- was not originally raised.
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               Ada.Exceptions.Reraise_Occurrence(X => Block_Excpt);
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               Report.Failed("Predefined exception not raised from " &
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                             "within the exception handler - 2");
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            when others =>
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               Report.Failed("Incorrect result from attempt to raise " &
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                             "Constraint_Error using the 'Identity "   &
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                             "attribute - 2");
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         end Inner_Block;
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         Report.Failed("Exception not propagated from Inner_Block");
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      exception
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         when Constraint_Error =>  -- Expected exception.
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            TC_Check_Points(5) := True;
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         when others =>
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            Report.Failed("Unexpected exception handled after second " &
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                          "reraise of Constraint_Error");
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      end Predefined_Exception_Block;
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      -- Verify the processing path taken through the test.
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      for i in 1..Check_Points loop
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         if not TC_Check_Points(i) then
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            Report.Failed("Incorrect processing path taken through test, " &
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                          "didn't pass check point #" & Integer'Image(i));
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         end if;
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      end loop;
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   exception
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      when others => Report.Failed ("Exception raised in Test_Block");
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   end Test_Block;
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   Report.Result;
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end CB41001;

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