CODEWITHSUNDEEP
c++exceptionc++11
Anonymous
Anonymous

Reputation: 4767

Defining own exception class in C++

I tried to figure out how to implement my own base class for C++ exceptions which allow adding an error specific text string. I see no possibility for the std::c++ exceptions to change the error text, even not in C++11: http://www.cplusplus.com/reference/exception/exception/. I also want to derive more specific exceptions from my Exception-base class. I read a lot of articles but I am still unsure whether my following implementation covers all important aspects. 

class Exception : public std::exception {      
    public:
        Exception(const char* message) : m(message) {

        }

        virtual ~Exception() throw() {

        }

        virtual const char* what() const throw() {
            return m.c_str();
        }

    protected:
        std::string m;

    private:
        Exception();
    };

Is this implementation fine?

Upvotes: 1

Views: 2046

Answers (1)

user657267
user657267

Reputation: 21040

If you derive from runtime_error (and your compiler supports inheriting constructors) you can condense your class to

struct Exception : public std::runtime_error
{
  using runtime_error::runtime_error;
};

throw(): Exception specifications are deprecated as of C++11, use noexcept instead.

Upvotes: 3

Related Questions