except.h

[詳解]

/**********************************************************************//*
 *  (c) 2001-2018 oZ/acy. ALL RIGHTS RESERVED.
 */
#ifndef INC_THEMIS_EXCEPT_H__
#define INC_THEMIS_EXCEPT_H__

#include <string>
#include <iostream>
#include <exception>

namespace themis
{

/*--------------------------------------*/
class EmptyException : public std::exception
{
public:
  EmptyException() noexcept {}
  virtual ~EmptyException() noexcept {}

  const char* what() const noexcept override
  {
    static const char rstr[] = "themis::EmptyException";
    return rstr;
  }
};



//-------------------------------------------
class Exception;

std::ostream& operator<<(std::ostream& os, const Exception& ex);

class Exception : public EmptyException
{
  friend std::ostream&
         themis::operator<<(std::ostream& os, const Exception& ex);

protected:
  std::string msg_; 

public:
  Exception() noexcept {}

  Exception(const std::string& m) : msg_(m) {}

  Exception(const std::string& c, const std::string& f, const std::string& m)
  {
    msg_ = c + "::" + f + " : " + m;
  }

  ~Exception() {}

  const char* what() const noexcept override
  {
    static const char rstr[] = "themis::Exception";
    return rstr;
  }
};


inline std::ostream& operator<<(std::ostream& os, const Exception& ex)
{
  return os << ex.msg_;
}


}// end of namespace themis


#endif