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C++ this vs *this

VARAK-VURAK answered on October 24, 2022 Popularity 3/10 Helpfulness 1/10

answer C++ this vs *this

C++ this vs *this

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#include <iostream>

class Foo
{
    public:
        Foo()
        {
            this->value = 0;
        }

        Foo get_copy()
        {
            return *this;
        }

        Foo& get_copy_as_reference()
        {
            return *this;
        }

        Foo* get_pointer()
        {
            return this;
        }

        void increment()
        {
            this->value++;
        }

        void print_value()
        {
            std::cout << this->value << std::endl;
        }

    private:
        int value;
};

int main()
{
    Foo foo;
    foo.increment();
    foo.print_value();

    foo.get_copy().increment();
    foo.print_value();

    foo.get_copy_as_reference().increment();
    foo.print_value();

    foo.get_pointer()->increment();
    foo.print_value();

    return 0;
}
/*
1
1
2
3
*/

/**
this:
+Pointer to an object of a class on which the non-static member function was called.
+prvalue-expression

*this:
+Result of dereferencing the this pointer. The result is the actual object on which the non-static member function was called.
+lvalue-expression
*/

Popularity 3/10 Helpfulness 1/10 Language cpp

Source: stackoverflow.com

Tags: c++ this

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