What Member Functions Does the C Compiler Automatically Generate?

Member Functions Auto-Generated by the Compiler in C

Question:

In C , what member functions does the compiler create automatically for a class? Does this occur consistently for all classes?

Answer:

The compiler may generate the following member functions for a class, depending on the need:

C 98/03:

• Default Constructor: Created if no user-defined constructor exists.
• Copy Constructor: Created if no user-defined copy constructor exists.
• Copy Assignment Operator: Created if no user-defined copy assignment operator exists.
• Destructor: Created if no user-defined destructor exists.

These functions are generated when needed and only if not explicitly declared by the programmer.

C 11:

In addition to the C 98/03 functions, C 11 introduced:

• Move Constructor: Generated if there are no user-defined constructors, assignment operators, or destructors, the function is not marked for deletion, and all members and bases are movable.
• Move Assignment Operator: Similarly, generated under the same conditions as the move constructor.

Default Constructor:

The default constructor is an implicitly generated constructor that takes no arguments. It initializes all member variables to default values or zeroes. The default constructor is essential for creating objects of a class without manually specifying arguments.

The above is the detailed content of What Member Functions Does the C Compiler Automatically Generate?. For more information, please follow other related articles on the PHP Chinese website!