C++11 关于 "=delete"

=delete

1. 禁止使用编译器默认生成的函数

class LeafFromTree{
public:
　　LeafFromTree() = default;
　　~LeafFromTree() = default;

　　LeafFromTree( const LeafFromTree& ) = delete;　　// mark copy ctor or copy assignment operator as deleted functions
　　LeafFromTree & operator=( const LeafFromTree &) = delete; 
};

2、C++11 中，delete 关键字可用于任何函数，不仅仅局限于类成员函数

#include <iostream>
using namespace std;

class DataOnly {
public:
    void fun(int a) {}
    void fun(float a) = delete;
};

int main(int argc, char *argv[]) {
    DataOnly data1;
    data1.fun(1); // OK
    data1.fun(0.5); // error: call to member function 'fun' is ambiguous
    return 0;
}