What functions cannot be overloaded in C++

In C, the following types of functions cannot be overloaded: 1. Constructors and destructors; 2. Friend functions; 3. Operator functions; 4. Forced type conversion functions. The reason is that these functions have special semantics and syntax rules, and overloading can lead to ambiguities and errors.

Functions that cannot be overloaded in C

In C, the following types of functions cannot be overloaded:

1. Constructor and destructor

The constructor is responsible for creating a new object, while the destructor is responsible for destroying the object. They have the same name as the class and therefore cannot be overloaded with other functions.

2. Friend function

Friend function has a special relationship with the class and can access the private and protected members of the class. They are specified by declaring them as class friends and therefore cannot be overloaded with other functions.

3. Operator functions

Operator functions (such as operator () and operator*()) are used for overloaded operators. They have special names so they cannot be overloaded with other functions.

4. Forced type conversion function

Forced type conversion function (such as operator int()) is used to convert objects to other types. They have special names so they cannot be overloaded with other functions.

Reason

The reason why these functions cannot be overloaded is mainly because they have special semantics and syntax rules. Overloading different function versions can lead to ambiguities and compiler errors. For example, if a constructor could be overloaded, the compiler would not be able to determine which constructor to use to create the object.

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