C ++模板说明 [英] C++ Template clarification

问题描述

任何人都可以请我解释下面给出的声明的含义吗?

Can anyone please explain me the meaning of the statement given below

template <typename T, int N>
char (&array(T(&)[N]))[N];

推荐答案

它是显式的模板专业化.
模板专门化有两种类型

1.明确

Its a explicit template specialization.
There are two types of template specialization

1. Explicit

template<> void sort<char*>(Array<char*>&);

2.部分

2. Partial

template<class T1, class T2, int I>
  class A             { };             

我们可以专门针对T2为T1 *的情况进行专门设置​​:

We can specialize this for the case when T2 is a T1*:

template<class T, int I>
class A<T, T*, I>   { };

或对于T1是任何指针的情况:

Or for the case when T1 is any pointer:

template<class T1, class T2, int I>
class A<T1*, T2, I> { };

或者对于T1为int且T2为任意指针且I为5的情况:

Or for the case when T1 is int and T2 is any pointer and I is 5:

template<class T>
class A<int, T*, 5> { };

或对于T2是任何指针的情况:

Or for the case when T2 is any pointer:

template<class T1, class T2, int I>
class A<T1, T2*, I> { };

声明2至5声明了主模板的部分专业化.

[edit]已修复，因此所有尖括号均显示[/edit]
[edit:rjm]添加了< pre>标签[/edit]

Declarations 2 to 5 declare partial specializations of the primary template.

[edit]Fixed so that all the angle brackets show[/edit]
[edit:rjm]added <pre> tags[/edit]

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