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 vote192 views1 answer
Waiting in a serial as the spool reflect the queue operation. Demonstrate Printer Behavior in context of Queue.Subject to the Scenario implement the Pop and Push Using C++.
C++
0 vote204 views1 answer
C++ add object to array
C++
0 vote198 views1 answer
C++ windows error message
C++
0 vote202 views1 answer
Ubuntu dotnet create blazorserver linux
C++
0 vote172 views1 answer
No indentation latex
C++
0 vote193 views1 answer
C++ put a function in a other thread
C++
4 votes218 views2 answers
Double max value c++
C++
0 vote190 views1 answer
Passing a 2d array cpp
C++
0 vote199 views1 answer
C++ random int troll
C++
-1 vote182 views1 answer
Palindrome no example
C++