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

0 vote332 views1 answer
Opencv compile c++
C++
0 vote303 views1 answer
Print duplicate characters from string in c++
C++
0 vote292 views1 answer
Inpout in Array c++
C++
0 vote295 views1 answer
Sort using lambda c++
C++
0 vote235 views1 answer
Two D Arrays
C++
0 vote289 views1 answer
Accpt array input in single line in cpp
C++
1 vote297 views1 answer
Xmake set exe name
C++
0 vote288 views1 answer
C++ hours minutes seconds
C++
0 vote282 views1 answer
How to get a word from file c++
C++
15 votes309 views3 answers
String to char array c++
C++