C++ Reactive Programming

Rvalue references 

If you have been programming in C++ for a long time, you might be familiar with the fact that C++ references help you to alias a variable and you can do assignment to the references to reflect the mutation in the variable aliased. The kinds of reference supported by C++ were called lvalue references (as they were references to variables that can come in the left side of the assignment). The following code snippets show the use of lvalue references:

//---- Lvalue.cpp#include <iostream>using namespace std;int main() {  int i=0;  cout << i << endl; //prints 0  int& ri = i;  ri = 20;  cout << i << endl; // prints 20}

int& is an instance of lvalue references. In Modern C++, there is the notion of rvalue references. rvalue is defined ...