THINK++ — Engineering Visualized

Self Reference

The this Pointer

Every object in C++ has access to its own address through a special pointer called this. It's an implicit parameter to all non-static member functions.

COMMON USAGES

class Employee {
    int id;
public:
    void setId(int id) {
        this->id = id; // Resolves naming conflict
    }
    Employee* getSelf() {
        return this;   // Returns current object address
    }
};

NAME RESOLUTION

Distinguishes between member variables and local parameters with the same name.

CHAINING

Allows method chaining by returning *this from member functions.

STATIC LIMITATION

static member functions do NOT have a this pointer because they are not associated with any specific object.

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This Pointer

This Pointer

The this Pointer

The this Pointer