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1------------------------------------------------------------------------------
2-- --
3-- GNAT RUN-TIME COMPONENTS --
4-- --
5-- A D A . E X C E P T I O N S . I S _ N U L L _ O C C U R R E N C E --
6-- --
7-- B o d y --
8-- --
748086b7 9-- Copyright (C) 2000-2009 Free Software Foundation, Inc. --
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10-- --
11-- GNAT is free software; you can redistribute it and/or modify it under --
12-- terms of the GNU General Public License as published by the Free Soft- --
748086b7 13-- ware Foundation; either version 3, or (at your option) any later ver- --
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14-- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
15-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
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16-- or FITNESS FOR A PARTICULAR PURPOSE. --
17-- --
18-- As a special exception under Section 7 of GPL version 3, you are granted --
19-- additional permissions described in the GCC Runtime Library Exception, --
20-- version 3.1, as published by the Free Software Foundation. --
21-- --
22-- You should have received a copy of the GNU General Public License and --
23-- a copy of the GCC Runtime Library Exception along with this program; --
24-- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
25-- <http://www.gnu.org/licenses/>. --
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26-- --
27-- GNAT was originally developed by the GNAT team at New York University. --
71ff80dc 28-- Extensive contributions were provided by Ada Core Technologies Inc. --
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29-- --
30------------------------------------------------------------------------------
31
32-- This is a GNAT-specific child function of Ada.Exceptions. It provides
33-- clearly missing functionality for its parent package, and most reasonably
34-- would simply be an added function to that package, but this change cannot
35-- be made in a conforming manner.
36
37function Ada.Exceptions.Is_Null_Occurrence
38 (X : Exception_Occurrence)
39 return Boolean
40is
41begin
42 -- The null exception is uniquely identified by the fact that the Id
43 -- value is null. No other exception occurrence can have a null Id.
44
45 if X.Id = Null_Id then
46 return True;
47 else
48 return False;
49 end if;
50end Ada.Exceptions.Is_Null_Occurrence;