errormessage.h

//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// errormessage.h


#ifndef _ERRORMESSAGE_H
#  define _ERRORMESSAGE_H

#  include "stringtool.h"
#  include <sstream>


///
class ErrorMessage
{
  tstringstream m_ost;				///
  
public:
  ///
  ErrorMessage() { }
  ///
  ErrorMessage(const ErrorMessage &i_em) { m_ost << i_em.getMessage(); }

  /// get error message
  tstring getMessage() const
  {
    return m_ost.str();
  }

  /// add message
  template<class T> ErrorMessage &operator<<(const T &i_value)
  {
    m_ost << i_value;
    return *this;
  }

  /// ios manipulator 
  ErrorMessage &operator<<(
    std::ios_base &(*i_manip)(std::ios_base&))
  {
    m_ost << i_manip;
    return *this;
  }

#ifdef UNICODE
  /// add message
  template<> ErrorMessage &operator<<(const std::string &i_value)
  {
    m_ost << to_wstring(i_value);
    return *this;
  }

  /// add message
  typedef const char *const_char_ptr;
  template<> ErrorMessage &operator<<(const const_char_ptr &i_value)
  {
    m_ost << to_wstring(i_value);
    return *this;
  }
#endif
  
  /// stream output
  friend tostream &operator<<(tostream &i_ost, const ErrorMessage &i_em);
};


/// stream output
inline tostream &operator<<(tostream &i_ost, const ErrorMessage &i_em)
{
  return i_ost << i_em.getMessage();
}


///
class WarningMessage : public ErrorMessage
{
public:
  /// add message
  template<class T> WarningMessage &operator<<(const T &i_value)
  {
    ErrorMessage::operator<<(i_value);
    return *this;
  }
};


#endif // !_ERRORMESSAGE_H