Singleton c++

class S
{
    public:
        static S& getInstance()
        {
            static S    instance; // Guaranteed to be destroyed.
                                  // Instantiated on first use.
            return instance;
        }
    private:
        S() {}                    // Constructor? (the {} brackets) are needed here.

        // C++ 03
        // ========
        // Don't forget to declare these two. You want to make sure they
        // are unacceptable otherwise you may accidentally get copies of
        // your singleton appearing.
        S(S const&);              // Don't Implement
        void operator=(S const&); // Don't implement

        // C++ 11
        // =======
        // We can use the better technique of deleting the methods
        // we don't want.
    public:
        S(S const&)               = delete;
        void operator=(S const&)  = delete;

        // Note: Scott Meyers mentions in his Effective Modern
        //       C++ book, that deleted functions should generally
        //       be public as it results in better error messages
        //       due to the compilers behavior to check accessibility
        //       before deleted status
};

Source: stackoverflow.com

Similar codes

-1 vote158 views1 answer
Error: Microsoft Visual C++ 14.0 is required. Get it with "Build Tools for Visual Studio": https://visualstudio.microsoft.com/downloads/
C++
0 vote165 views1 answer
Select elements from array C++
C++
0 vote170 views3 answers
C++ tuple
C++
4 votes187 views2 answers
How to hide the console c++
C++
0 vote194 views1 answer
Fast i/o in c++
C++
6 votes176 views1 answer
C++ if in equivalent
C++
1 vote194 views1 answer
Roscpp publish int32
C++
0 vote166 views1 answer
Raspberry pi mount external hard drive
C++
0 vote170 views1 answer
Run c++ program in mac terminal
C++
1 vote205 views1 answer
C++ char define
C++