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   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                         GNAT COMPILER COMPONENTS                         --
   4 --                                                                          --
   5 --                              I M P U N I T                               --
   6 --                                                                          --
   7 --                                 S p e c                                  --
   8 --                                                                          --
   9 --          Copyright (C) 2000-2005 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 2,  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.  See the GNU General Public License --
  17 -- for  more details.  You should have  received  a copy of the GNU General --
  18 -- Public License  distributed with GNAT;  see file COPYING.  If not, write --
  19 -- to  the Free Software Foundation,  59 Temple Place - Suite 330,  Boston, --
  20 -- MA 02111-1307, USA.                                                      --
  21 --                                                                          --
  22 -- GNAT was originally developed  by the GNAT team at  New York University. --
  23 -- Extensive contributions were provided by Ada Core Technologies Inc.      --
  24 --                                                                          --
  25 ------------------------------------------------------------------------------
  26
  27 --  This package contains data and functions used to determine if a given
  28 --  unit is an internal unit intended only for use by the implementation
  29 --  and which should not be directly WITH'ed by user code. It also checks
  30 --  for Ada 05 units that should only be WITH'ed in Ada 05 mode.
  31
  32 with Types; use Types;
  33
  34 package Impunit is
  35
  36    type Kind_Of_Unit is
  37      (Implementation_Unit,
  38       --  Unit from predefined library intended to be used only by the
  39       --  compiler generated code, or from the implementation of the run time.
  40       --  Use of such a unit generates a warning unless the client is compiled
  41       --  with the -gnatg switch. If we are being super strict, this should be
  42       --  an error for the case of Ada units, but that seems over strenuous.
  43
  44       Not_Predefined_Unit,
  45       --  This is not a predefined unit, so no checks are needed
  46
  47       Ada_95_Unit,
  48       --  This unit is defined in the Ada 95 RM, and can be freely with'ed
  49       --  in both Ada 95 mode and Ada 05 mode. Note that in Ada 83 mode, no
  50       --  child units are allowed, so you can't even name such a unit.
  51
  52       Ada_05_Unit);
  53    --  This unit is defined in the Ada 05 RM. Withing this unit from a
  54    --  Ada 95 mode program will generate a warning (again, strictly speaking
  55    --  this should be an error, but that seems over-strenuous).
  56
  57    function Get_Kind_Of_Unit (U : Unit_Number_Type) return Kind_Of_Unit;
  58    --  Given the unit number of a unit, this function determines the type
  59    --  of the unit, as defined above.
  60
  61 end Impunit;