File : a-einuoc.adb
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 -- --
9 -- Copyright (C) 2000-2009, Free Software Foundation, Inc. --
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- --
13 -- ware Foundation; either version 3, or (at your option) any later ver- --
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 --
16 -- or FITNESS FOR A PARTICULAR PURPOSE. --
17 -- --
18 -- --
19 -- --
20 -- --
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/>. --
26 -- --
27 -- GNAT was originally developed by the GNAT team at New York University. --
28 -- Extensive contributions were provided by Ada Core Technologies Inc. --
29 -- --
30 ------------------------------------------------------------------------------
31
32 ---------------------------------------
33 -- Ada.Exceptions.Is_Null_Occurrence --
34 ---------------------------------------
35
36 function Ada.Exceptions.Is_Null_Occurrence
37 (X : Exception_Occurrence) return Boolean
38 is
39 begin
40 -- The null exception is uniquely identified by the fact that the Id value
41 -- is null. No other exception occurrence can have a null Id.
42
43 if X.Id = Null_Id then
44 return True;
45 else
46 return False;
47 end if;
48 end Ada.Exceptions.Is_Null_Occurrence;