New Language: Ada

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@45955 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 79 insertions, 0 deletions

diff --git a/gcc/ada/g-except.ads b/gcc/ada/g-except.ads
new file mode 100644
index 00000000000..b4c107c6a12
--- /dev/null
+++ b/gcc/ada/g-except.ads
@@ -0,0 +1,79 @@
+------------------------------------------------------------------------------
+--                                                                          --
+--                         GNAT RUN-TIME COMPONENTS                         --
+--                                                                          --
+--                      G N A T . E X C E P T I O N S                       --
+--                                                                          --
+--                                 S p e c                                  --
+--                                                                          --
+--                            $Revision: 1.9 $
+--                                                                          --
+--           Copyright (C) 2000-2001 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 an interface for raising predefined exceptions
+--  with an exception message. It can be used from Pure units. This unit
+--  is for internal use only, it is not generally available to applications.
+
+package GNAT.Exceptions is
+pragma Pure (Exceptions);
+
+   type Exception_Type is limited null record;
+   --  Type used to specify which exception to raise.
+
+   --  Really Exception_Type is Exception_Id, but Exception_Id can't be
+   --  used directly since it is declared in the non-pure unit Ada.Exceptions,
+
+   --  Exception_Id is in fact simply a pointer to the type Exception_Data
+   --  declared in System.Standard_Library (which is also non-pure). So what
+   --  we do is to define it here as a by reference type (any by reference
+   --  type would do), and then Import the definitions from Standard_Library.
+   --  Since this is a by reference type, these will be passed by reference,
+   --  which has the same effect as passing a pointer.
+
+   --  This type is not private because keeping it by reference would require
+   --  defining it in a way (e.g a tagged type) that would drag other run time
+   --  files, which is unwanted in the case of e.g ravenscar where we want to
+   --  minimize the number of run time files needed by default.
+
+   CE : constant Exception_Type;  -- Constraint_Error
+   PE : constant Exception_Type;  -- Program_Error
+   SE : constant Exception_Type;  -- Storage_Error
+   TE : constant Exception_Type;  -- Tasking_Error
+   --  One of these constants is used in the call to specify the exception
+
+   procedure Raise_Exception (E : Exception_Type; Message : String);
+   pragma Import (Ada, Raise_Exception, "__gnat_raise_exception");
+   pragma No_Return (Raise_Exception);
+   --  Raise specified exception with specified message
+
+private
+   pragma Import (C, CE, "constraint_error");
+   pragma Import (C, PE, "program_error");
+   pragma Import (C, SE, "storage_error");
+   pragma Import (C, TE, "tasking_error");
+   --  References to the exception structures in the standard library
+
+end GNAT.Exceptions;