什么是“cv不合格”是什么意思在C ++？ [英] What does "cv-unqualified" mean in C++?

问题描述

从主题。我在最近问的一个问题中看到了这个术语，显然这是一个很好的术语，但是我在stackoverflow上找不到任何东西。

解决方案

有基本类型和复合类型。基本类型是算术类型， void 和 std :: nullptr_t 。复合类型是数组，函数，指针，引用，类，联合，枚举和指向非静态成员的指针。

A cv-unqualified 对于任何cv非限定类型，有三种对应的 cv限定类型：

• const限定 - 与 const cv-qualifier
• 
  
• 使用 volatile cv-qualifier
const 和 volatile cv-qualifiers li>

请注意，应用于数组类型的cv-qualifiers实际上适用于其元素。

cv限定类型和cv非限定类型是不同的。也就是 int 是一个与 const int 不同的类型。

As from subject. I saw this terminology in a question I recently asked, and apparently it's a well established term, but I am not able to find anything on stackoverflow.

解决方案

There are fundamental types and compound types. Fundamental types are the arithmetic types, void, and std::nullptr_t. Compound types are arrays, functions, pointers, references, classes, unions, enumerations, and pointers to non-static members.

A cv-unqualified type is any of those types.

For any cv-unqualified type, there are three corresponding cv-qualified types:

• const-qualified - with the const cv-qualifier
• volatile-qualified - with the volatile cv-qualifier
• const-volatile-qualified - with both the const and volatile cv-qualifiers

Note, however, that cv-qualifiers applied to an array type actually apply to its elements.

The cv-qualified and cv-unqualified types are distinct. That is int is a distinct type from const int.

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