如何在交换机的情况下使用右值引用

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I want to use t(rvalue reference) in a case of switch(T), but I get an error the value of 't' is not usable in a constant expression. How to do it the right way.

#include <iostream>
using namespace std;
int main(){
    int (&&t)=5;
    int T{};
    switch(T){
        case t:   // error in this case
            cout<<t<<endl;
            break;
        default:
            cout<<"default"<<endl;
            break;
    }
}