Home > Backend Development > C++ > body text

Constructor Inheritance in C 11: How Does It Work?

Mary-Kate Olsen
Release: 2024-11-07 01:49:03
Original
501 people have browsed it

Constructor Inheritance in C  11: How Does It Work?

Inheriting Constructors in C 11

In C 11, constructor inheritance allows a derived class to implicitly inherit constructors from its base class. This is achieved through the using keyword, which specifies that the derived class should use the constructors of the base class.

Syntax:

struct B {
  B(int); // Normal constructor 1
  B(string); // Normal constructor 2
};

struct D : B {
  using B::B; // Inherit constructors from B
};
Copy after login

Implications:

  • The derived class D now has the inherited constructors:

    • D::D(int);
    • D::D(string);
  • Member variables of D are default-initialized by these inherited constructors.

Applications:

Constructor inheritance is useful in the following scenarios:

  • Saving typing effort: It eliminates the need to manually define constructors in the derived class.
  • Ensuring base-class initialization: It guarantees that the base class is initialized properly.

In-Depth Explanation:

The Standard Library defines the inheriting constructors as follows:

D::D(int x) : B(x) {}
D::D(string s) : B(s) {}
Copy after login

This means that when an instance of the derived class D is constructed, it will call the appropriate constructor of the base class B to initialize its base members.

The above is the detailed content of Constructor Inheritance in C 11: How Does It Work?. For more information, please follow other related articles on the PHP Chinese website!

source:php.cn
Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
Latest Articles by Author
Popular Tutorials
More>
Latest Downloads
More>
Web Effects
Website Source Code
Website Materials
Front End Template
About us Disclaimer Sitemap
php.cn:Public welfare online PHP training,Help PHP learners grow quickly!