MessagePrinterOverlay.h

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/*
  Copyright (C) 2002-2019 CERN for the benefit of the ATLAS collaboration
*/
 
 
 
 
#ifndef ASG_MESSAGING__MESSAGE_PRINTER_OVERLAY_H
#define ASG_MESSAGING__MESSAGE_PRINTER_OVERLAY_H
 
namespace asg
{
  class IMessagePrinter;
 
 
  class MessagePrinterOverlay final
  {
    //
    // public interface
    //
 
    MessagePrinterOverlay (MessagePrinterOverlay&) = delete;
    MessagePrinterOverlay operator = (MessagePrinterOverlay&) = delete;
 
 
  public:
    MessagePrinterOverlay (IMessagePrinter *val_printer) noexcept;
 
  public:
    ~MessagePrinterOverlay () noexcept;
 
  public:
    static IMessagePrinter& current () noexcept;
 
 
 
    //
    // private interface
    //
 
  private:
    static IMessagePrinter*& getCurrent () noexcept;
 
  private:
    IMessagePrinter *m_saved = nullptr;
 
  private:
    IMessagePrinter *m_current = nullptr;
  };
}
 
#endif