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diff --git a/src/vhdl/disp_vhdl.ads b/src/vhdl/disp_vhdl.ads
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+--  VHDL regeneration from internal nodes.
+--  Copyright (C) 2002, 2003, 2004, 2005 Tristan Gingold
+--
+--  GHDL is free software; you can redistribute it and/or modify it under
+--  the terms of the GNU General Public License as published by the Free
+--  Software Foundation; either version 2, or (at your option) any later
+--  version.
+--
+--  GHDL is distributed in the hope that it will be useful, but WITHOUT 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
+--  along with GHDL; see the file COPYING.  If not, write to the Free
+--  Software Foundation, 59 Temple Place - Suite 330, Boston, MA
+--  02111-1307, USA.
+with Types; use Types;
+with Iirs; use Iirs;
+
+package Disp_Vhdl is
+   -- General procedure to display a node.
+   -- Mainly used to dispatch to other functions according to the kind of
+   -- the node.
+   procedure Disp_Vhdl (An_Iir: Iir);
+
+   procedure Disp_Expression (Expr: Iir);
+   --  Display an expression.
+
+   -- Disp an iir_int64, without the leading blank.
+   procedure Disp_Int64 (Val: Iir_Int64);
+
+   -- Disp an iir_int32, without the leading blank.
+   procedure Disp_Int32 (Val: Iir_Int32);
+
+   -- Disp an iir_Fp64, without the leading blank.
+   procedure Disp_Fp64 (Val: Iir_Fp64);
+end Disp_Vhdl;