c++ - C ++中的POD类型是什么？(What are POD types in C++?)

Question

I've come across this term POD-type a few times.

(我有几次遇到这个术语POD型。)

What does it mean?

(这是什么意思？)

  ask by paxos1977 translate from so

Answer 1

POD stands for Plain Old Data - that is, a class (whether defined with the keyword struct or the keyword class ) without constructors, destructors and virtual members functions.

(POD代表普通旧数据 - 即没有构造函数，析构函数和虚拟成员函数的类（无论是使用关键字struct还是关键字class ）。)

Wikipedia's article on POD goes into a bit more detail and defines it as:

(维基百科关于POD的文章更详细，并将其定义为：)

A Plain Old Data Structure in C++ is an aggregate class that contains only PODS as members, has no user-defined destructor, no user-defined copy assignment operator, and no nonstatic members of pointer-to-member type.

(C ++中的普通旧数据结构是一个聚合类，它只包含PODS作为成员，没有用户定义的析构函数，没有用户定义的复制赋值运算符，也没有指向成员类型的非静态成员。)

Greater detail can be found in this answer for C++98/03 .

(在C ++ 98/03的答案中可以找到更多细节。)

C++11 changed the rules surrounding POD, relaxing them greatly, thus necessitating a follow-up answer here .

(C ++ 11改变了围绕POD的规则，使它们大大放松，因此需要在此处进行后续回答 。)