什么是静态构造函数？ [英] What is a static constructor?

问题描述

这个问题是在采访中问我的：

This question was asked to me in an interview:

什么是静态构造函数？

What is a static constructor?

它在C ++中存在吗？如果是，请举例说明。

Does it exist in C++? If yes, please explain it with an example.

推荐答案

C ++没有静态构造函数，但您可以使用静态构造函数进行仿真

C++ doesn’t have static constructors but you can emulate them using a static instance of a nested class.

class has_static_constructor {
    friend class constructor;

    struct constructor {
        constructor() { /* do some constructing here … */ }
    };

    static constructor cons;
};

// C++ needs to define static members externally.
has_static_constructor::constructor has_static_constructor::cons;

这篇关于什么是静态构造函数？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！