| ------------------------------------------------------------------------------ |
| -- -- |
| -- 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 -- |
| -- -- |
| -- Copyright (C) 2000-2021, AdaCore -- |
| -- -- |
| -- 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 3, 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. -- |
| -- -- |
| -- As a special exception under Section 7 of GPL version 3, you are granted -- |
| -- additional permissions described in the GCC Runtime Library Exception, -- |
| -- version 3.1, as published by the Free Software Foundation. -- |
| -- -- |
| -- You should have received a copy of the GNU General Public License and -- |
| -- a copy of the GCC Runtime Library Exception along with this program; -- |
| -- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see -- |
| -- <http://www.gnu.org/licenses/>. -- |
| -- -- |
| -- GNAT was originally developed by the GNAT team at New York University. -- |
| -- Extensive contributions were provided by Ada Core Technologies Inc. -- |
| -- -- |
| ------------------------------------------------------------------------------ |
| |
| -- 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 mimicking 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; |
