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Diffstat (limited to 'gcc/ada/g-moreex.ads')
| -rw-r--r-- | gcc/ada/g-moreex.ads | 79 |
1 files changed, 79 insertions, 0 deletions
diff --git a/gcc/ada/g-moreex.ads b/gcc/ada/g-moreex.ads new file mode 100644 index 00000000000..c5216076e0f --- /dev/null +++ b/gcc/ada/g-moreex.ads @@ -0,0 +1,79 @@ +------------------------------------------------------------------------------ +-- -- +-- GNAT LIBRARY COMPONENTS -- +-- -- +-- G N A T . M O S T _ R E C E N T _ E X C E P T I O N -- +-- -- +-- S p e c -- +-- -- +-- $Revision: 1.2 $ +-- -- +-- Copyright (C) 2000 Ada Core Technologies, Inc. -- +-- -- +-- GNAT is free software; you can redistribute it and/or modify it under -- +-- terms of the GNU General Public License as published by the Free Soft- -- +-- ware Foundation; either version 2, or (at your option) any later ver- -- +-- sion. GNAT is distributed in the hope that it will be useful, but WITH- -- +-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY -- +-- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License -- +-- for more details. You should have received a copy of the GNU General -- +-- Public License distributed with GNAT; see file COPYING. If not, write -- +-- to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, -- +-- MA 02111-1307, USA. -- +-- -- +-- As a special exception, if other files instantiate generics from this -- +-- unit, or you link this unit with other files to produce an executable, -- +-- this unit does not by itself cause the resulting executable to be -- +-- covered by the GNU General Public License. This exception does not -- +-- however invalidate any other reasons why the executable file might be -- +-- covered by the GNU Public License. -- +-- -- +-- GNAT was originally developed by the GNAT team at New York University. -- +-- It is now maintained by Ada Core Technologies Inc (http://www.gnat.com). -- +-- -- +------------------------------------------------------------------------------ + +-- This package provides routines for accessing the most recently raised +-- exception. This may be useful for certain logging activities. It may +-- also be useful for mimicing implementation dependent capabilities in +-- Ada 83 compilers, but see also GNAT.Current_Exceptions for this usage. + +with Ada.Exceptions; +package GNAT.Most_Recent_Exception is + + ----------------- + -- Subprograms -- + ----------------- + + function Occurrence + return Ada.Exceptions.Exception_Occurrence; + -- Returns the Exception_Occurrence for the most recently raised + -- exception in the current task. If no exception has been raised + -- in the current task prior to the call, returns Null_Occurrence. + + function Occurrence_Access + return Ada.Exceptions.Exception_Occurrence_Access; + -- Similar to the above, but returns an access to the occurrence value. + -- This value is in a task specific location, and may be validly accessed + -- as long as no further exception is raised in the calling task. + + -- Note: unlike the routines in GNAT.Current_Exception, these functions + -- access the most recently raised exception, regardless of where they + -- are called. Consider the following example: + + -- exception + -- when Constraint_Error => + -- begin + -- ... + -- exception + -- when Tasking_Error => ... + -- end; + -- + -- -- Assuming a Tasking_Error was raised in the inner block, + -- -- a call to GNAT.Most_Recent_Exception.Occurrence will + -- -- return information about this Tasking_Error exception, + -- -- not about the Constraint_Error exception being handled + -- -- by the current handler code. + + +end GNAT.Most_Recent_Exception; |