是什么意思::〜

Question

在下面的代码中,::〜的含义是什么

GaussianMex::~GaussianMex()
{
   int i;
}

Answer 1

这不是单个运算符::~,而是GaussianMex析构函数的定义.您可以通过ClassName::ClassMethod语法定义类方法,因为析构函数名称是~ClassName析构函数定义的结果ClassName::~ClassName.

Answer 2

这是一个析构函数.

考虑:

class GaussianMex
{
public:

    // This is the CONstructor (ctor).  It is called when an instance of the class is created
    GaussianMex()
    {
    };

    // This is a Copy constructor (cctor).  It is used when copying an object.
    GaussianMex(const GaussianMex& rhs)
    {
    };


    // This is a move constructor.  It used when moving an object!
    GaussianMex(GaussianMex&& rhs)
    {
    };


    // This is the DEStructor.  It is called when an instance is destroyed.
    ~GaussianMex()
    {
    };


    // This is an assignment operator.  It is called when "this" instance is assigned
    // to another instance.
    GaussianMex& operator = (const GaussianMex& rhs)
    {
        return *this;
    };


    // This is used to swap two instances of GaussianMex with one another.
    friend void swap(GaussianMex& lhs, GaussianMex& rhs)
    {
    };
};  // eo class GuassianMex

构造函数的目的是进行所需的任何初始化(可能分配内存或其他类实例).析构函数执行相反的操作 - 它执行类在其生命周期中分配的任何资源的清理.