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+------------------------------------------------------------------------------
+--                                                                          --
+--                         GNAT COMPILER COMPONENTS                         --
+--                                                                          --
+--                             T R E E _ G E N                              --
+--                                                                          --
+--                                 B o d y                                  --
+--                                                                          --
+--          Copyright (C) 1992-2007, 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.      --
+--                                                                          --
+------------------------------------------------------------------------------
+
+with Atree;
+with Elists;
+with Fname;
+with Lib;
+with Namet;
+with Nlists;
+with Opt;
+with Osint.C;
+with Repinfo;
+with Sinput;
+with Stand;
+with Stringt;
+with Uintp;
+with Urealp;
+
+procedure Tree_Gen is
+begin
+   if Opt.Tree_Output then
+      Osint.C.Tree_Create;
+      Opt.Tree_Write;
+      Atree.Tree_Write;
+      Elists.Tree_Write;
+      Fname.Tree_Write;
+      Lib.Tree_Write;
+      Namet.Tree_Write;
+      Nlists.Tree_Write;
+      Sinput.Tree_Write;
+      Stand.Tree_Write;
+      Stringt.Tree_Write;
+      Uintp.Tree_Write;
+      Urealp.Tree_Write;
+      Repinfo.Tree_Write;
+      Osint.C.Tree_Close;
+   end if;
+end Tree_Gen;