1 ------------------------------------------------------------------------------
3 -- GNAT LIBRARY COMPONENTS --
5 -- G N A T . M O S T _ R E C E N T _ E X C E P T I O N --
11 -- Copyright (C) 2000 Ada Core Technologies, Inc. --
13 -- GNAT is free software; you can redistribute it and/or modify it under --
14 -- terms of the GNU General Public License as published by the Free Soft- --
15 -- ware Foundation; either version 2, or (at your option) any later ver- --
16 -- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
17 -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
18 -- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License --
19 -- for more details. You should have received a copy of the GNU General --
20 -- Public License distributed with GNAT; see file COPYING. If not, write --
21 -- to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, --
22 -- MA 02111-1307, USA. --
24 -- As a special exception, if other files instantiate generics from this --
25 -- unit, or you link this unit with other files to produce an executable, --
26 -- this unit does not by itself cause the resulting executable to be --
27 -- covered by the GNU General Public License. This exception does not --
28 -- however invalidate any other reasons why the executable file might be --
29 -- covered by the GNU Public License. --
31 -- GNAT was originally developed by the GNAT team at New York University. --
32 -- It is now maintained by Ada Core Technologies Inc (http://www.gnat.com). --
34 ------------------------------------------------------------------------------
36 -- This package provides routines for accessing the most recently raised
37 -- exception. This may be useful for certain logging activities. It may
38 -- also be useful for mimicing implementation dependent capabilities in
39 -- Ada 83 compilers, but see also GNAT.Current_Exceptions for this usage.
42 package GNAT.Most_Recent_Exception is
49 return Ada.Exceptions.Exception_Occurrence;
50 -- Returns the Exception_Occurrence for the most recently raised
51 -- exception in the current task. If no exception has been raised
52 -- in the current task prior to the call, returns Null_Occurrence.
54 function Occurrence_Access
55 return Ada.Exceptions.Exception_Occurrence_Access;
56 -- Similar to the above, but returns an access to the occurrence value.
57 -- This value is in a task specific location, and may be validly accessed
58 -- as long as no further exception is raised in the calling task.
60 -- Note: unlike the routines in GNAT.Current_Exception, these functions
61 -- access the most recently raised exception, regardless of where they
62 -- are called. Consider the following example:
65 -- when Constraint_Error =>
69 -- when Tasking_Error => ...
72 -- -- Assuming a Tasking_Error was raised in the inner block,
73 -- -- a call to GNAT.Most_Recent_Exception.Occurrence will
74 -- -- return information about this Tasking_Error exception,
75 -- -- not about the Constraint_Error exception being handled
76 -- -- by the current handler code.
79 end GNAT.Most_Recent_Exception;