Exception.h

#pragma once
 
#include <string>
#include <exception>
#include <ostream>
 
namespace hdtree {
 
class HDTreeException : public std::exception {
  std::string message_;
  std::string help_;
 public:
  HDTreeException(const std::string& msg, const std::string& help = "") noexcept;
 
  const char* what() const noexcept;
 
  std::ostream& stream(std::ostream& o) const noexcept;
};
 
}
 
std::ostream& operator<<(std::ostream& o, const hdtree::HDTreeException& e);