c++11std::function使用

#include <iostream>#include<functional>using namespace std;void fun(int a){cout << a << endl;}struct A{A& operator= (const A&){}void operator()(){cout << "void op

酸菜。

155人浏览 · 2021-06-08 15:04:26

酸菜。 · 2021-06-08 15:04:26 发布

#include <iostream>
#include<functional>
using namespace std;
void fun(int a)
{
    cout << a << endl;
}
struct A
{
    A& operator= (const A&)
    {

    }

    void operator()()
    {
        cout << "void operator()()" << endl;
    }

    static void abc(int a, int b)
    {
        cout << "void abc(int a, int b)" << endl;
    }

    void ab(int a, int b)
    {
        cout << "void abc(int a, int b)" << endl;
    }
};

int main()
{
    A a;

    /*普通函数指针=静态成员函数指针(没有this指针)!=非静态成员函数指针*/
    void (*p)(int, int) = &A::abc;
    std::function<void(int)> f1 = fun;
    std::function<void()> f2 = a;
    std::function<void(int,int)> f3 = A::abc;

    //std::function<void(int, int)> f4 = A::ab; 不可以，function不支持
    return 0;
}