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--                                                                          --

--                         GNAT COMPILER COMPONENTS                         --

--                                                                          --

--                             S E M _ E L I M                              --

--                                                                          --

--                                 S p e c                                  --

--                                                                          --

--          Copyright (C) 1997-2008, 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 3,  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 COPYING3.  If not, go to --

-- http://www.gnu.org/licenses for a complete copy of the license.          --

--                                                                          --

-- GNAT was originally developed  by the GNAT team at  New York University. --

-- Extensive contributions were provided by Ada Core Technologies Inc.      --

--                                                                          --

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--  This package contains the routines used to process the Eliminate pragma

with Types; use Types;

package Sem_Elim is

   procedure Initialize;

   --  Initialize for new main source program

   procedure Process_Eliminate_Pragma

     (Pragma_Node         : Node_Id;

      Arg_Unit_Name       : Node_Id;

      Arg_Entity          : Node_Id;

      Arg_Parameter_Types : Node_Id;

      Arg_Result_Type     : Node_Id;

      Arg_Source_Location : Node_Id);

   --  Process eliminate pragma (given by Pragma_Node). The number of

   --  arguments has been checked, as well as possible optional identifiers,

   --  but no other checks have been made. This subprogram completes the

   --  checking, and then if the pragma is well formed, makes appropriate

   --  entries in the internal tables used to keep track of Eliminate pragmas.

   --  The other five arguments are expressions (rather than pragma argument

   --  associations) for the possible pragma arguments. A parameter that

   --  is not present is set to Empty.

   procedure Check_Eliminated (E : Entity_Id);

   --  Checks if entity E is eliminated, and if so sets the Is_Eliminated

   --  flag on the given entity.

   procedure Check_For_Eliminated_Subprogram (N : Node_Id; S : Entity_Id);

   --  Check that the subprogram S (or its ultimate parent in the case of a

   --  derived subprogram or renaming) has not been eliminated. An error will

   --  be flagged if the subprogram has been eliminated, unless the node N

   --  occurs within an eliminated subprogram or within a generic unit. The

   --  error will be posted on N.

   procedure Eliminate_Error_Msg (N : Node_Id; E : Entity_Id);

   --  Called by the front-end and back-end on encountering a reference to an

   --  eliminated subprogram. N is the node for the reference (such as occurs

   --  in a call or attribute), and E is the entity of the subprogram that has

   --  been eliminated.

end Sem_Elim;