text: #ifndef INFO_H
  #define INFO_H
  // *****************************************************************************
  // info.h                                                             XL project
  // *****************************************************************************
  //
  // File description:
  //
  //    Information that can be attached to trees
  //
  //
  //
  //
  //
  //
  //
  //
  // *****************************************************************************
  // This software is licensed under the GNU General Public License v3+
  // (C) 2003-2004,2006,2010,2014-2017,2019-2020, Christophe de Dinechin <christophe@dinechin.org>
  // (C) 2010-2012, Jérôme Forissier <jerome@taodyne.com>
  // (C) 2004, Sébastien Brochet <sebbrochet@sourceforge.net>
  // *****************************************************************************
  // This file is part of XL
  //
  // XL 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 3 of the License,
  // or (at your option) any later version.
  //
  // XL 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 XL, in a file named COPYING.
  // If not, see <https://www.gnu.org/licenses/>.
  // *****************************************************************************
  
  #include "base.h"
  #include "atomic.h"
  
  
  XL_BEGIN
  
  struct Tree;
  
  struct Info
  // ----------------------------------------------------------------------------
  //   Information associated with a tree
  // ----------------------------------------------------------------------------
  {
  public:
                          Info()                  : next(nullptr) {}
      virtual             ~Info()                 {}
      virtual void        Delete()                { delete this; }
  
  public:
      friend struct Tree;
      Atomic<Info *>      next;
  #ifdef XL_DEBUG
      Atomic<Tree *>      owner;
  #endif
  
  private:
      // Can't copy info
                          Info(const Info &)      : next(nullptr) {}
  };
  
  XL_END
  
  #endif // INFO_H
  