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+------------------------------------------------------------------------------
+-- --
+-- GNAT COMPILER COMPONENTS --
+-- --
+-- I M P U N I T --
+-- --
+-- S p e c --
+-- --
+-- $Revision: 1.1 $
+-- --
+-- Copyright (C) 2000 Free Software Foundation, 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. --
+-- --
+-- 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 contains data and functions used to determine if a given
+-- unit is an internal unit intended only for use by the implementation
+-- and which should not be directly WITH'ed by user code.
+
+with Types; use Types;
+
+package Impunit is
+
+ function Implementation_Unit (U : Unit_Number_Type) return Boolean;
+ -- Given the unit number of a unit, this function determines if it is a
+ -- unit that is intended to be used only internally by the implementation.
+ -- This is used for posting warnings for improper WITH's of such units
+ -- (such WITH's are allowed without warnings only in GNAT_Mode set by
+ -- the use of -gnatg). True is returned if a warning should be posted.
+
+end Impunit;