diagnostics

// -*- C++ -*-
// Copyright (C) 2013, Gabriel Dos Reis.
// All rights reserved.
// Written by Gabriel Dos Reis.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
//     - Redistributions of source code must retain the above copyright
//       notice, this list of conditions and the following disclaimer.
//
//     - Redistributions in binary form must reproduce the above copyright
//       notice, this list of conditions and the following disclaimer in
//       the documentation and/or other materials provided with the
//       distribution.
//
//     - Neither the name of OpenAxiom. nor the names of its contributors
//       may be used to endorse or promote products derived from this
//       software without specific prior written permission.
//
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// IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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#ifndef OPENAXIOM_DIAGNOSTICS_included
#define OPENAXIOM_DIAGNOSTICS_included

#include <string>
#include <iostream>

namespace OpenAxiom {
   namespace Diagnostics {
      struct StandardStream {
         StandardStream(std::ostream& = std::cout, std::ostream& = std::cerr);
         ~StandardStream();

         std::ostream& output() const { return *out; }
         std::ostream& error() const { return *err; }
         std::ostream& set_output(std::ostream&);
         std::ostream& set_error(std::ostream&);
      private:
         std::ostream* out;
         std::ostream* err;
      };
      
      struct BasicError {
         explicit BasicError(const std::string& s) : msg(s) { }
         const std::string& message() const { return msg; }
      protected:
         std::string msg;
      };
   }
}

#endif