#pragma once

#include <iosfwd>
#include <string>

namespace logging {
  struct logpacket;
  struct layout {
    virtual ~layout() = default;
    virtual void format(std::ostream & os, logpacket const & pkt) const = 0;
    virtual std::string header() const { return ""; }
    virtual std::string footer() const { return ""; }
    virtual std::string separator() const { return ""; }
  };
}