type trait

• [remove_reference]

点击查看代码

#include<iostream>

using namespace std;

template<typename Tp>
class remove_ref {
public:
    typedef Tp type;
};

template<typename Tp>
class remove_ref<Tp&> {
public:
    typedef Tp type;
};

void test(int &param) {
    //解除了引用
    remove_ref<int&>::type p = param;
    p = 100000000;
    cout << "param = " << param<< endl;
}

int main() {
    int a = 3;
    // sucess to remove reference
    test(a);
    cout << "a = " << a << endl;
    return 0;
}

- [is_intergal]