Home - News ( United States | United Kingdom | Italy | Germany ) - Football scores

Showing content from https://www.geeksforgeeks.org/cpp/type-of-this-pointer-in-cpp/ below:

Type of 'this' Pointer in C++

Last Updated : 23 Jul, 2025

In C++, this pointer refers to the current object of the class and passes it as a parameter to another method. 'this pointer' is passed as a hidden argument to all non-static member function calls. 

The type of this depends upon function declaration. The type of this pointer is either const ExampleClass * or ExampleClass *. It depends on whether it lies inside a const or a non-const method of the class ExampleClass.

If the member function of class X is declared const, the type of this is const X* 

Example:

// C++ Program to demonstrate
// if the member function of a
// class X is declared const
#include <iostream>
using namespace std;

class X {
    void fun() const
    {
        // this is passed as hidden argument to fun().
        // Type of this is const X* const
    }
};

If the member function is declared volatile, the type of this is volatile X* as shown below

Example:

// C++ Program to demonstrate
// if the member function is
// declared volatile
#include <iostream>
using namespace std;

class X {
    void fun() volatile
    {
        // this is passed as hidden argument to fun().
        // Type of this is volatile X* const
    }
};

If the member function is declared const volatile, the type of this is const volatile X*.

Example:

// C++ program to demonstrate
// if the member function is
// declared const volatile
#include <iostream>
using namespace std;

class X {
    void fun() const volatile
    {
        // this is passed as hidden argument to fun().
        // Type of this is const volatile X* const
    }
};

Please note that const, volatile, and const volatile are type qualifiers.

What are type qualifiers?

A type qualifier is a keyword that is applied to a data type variable resulting in a qualified type.

For Example, float is the corresponding unqualified type, simply a floating number, while const float is a qualified type representing a constant floating number.

Note: 'this' pointer is not an lvalue.

RetroSearch is an open source project built by @garambo | Open a GitHub Issue

Search and Browse the WWW like it's 1997 | Search results from DuckDuckGo

HTML: 3.2 | Encoding: UTF-8 | Version: 0.7.4