C++ Reactive Programming

Substitutability

In the previous example, we saw how a user-defined type can be used to express all the operations done on a built-in type. Another goal of C++ is to write code in a generic manner where we can substitute a user-defined class that mimics the semantics of one of the built-in types such as float, double, int, and so on:

//------------- from SmartValue.cpptemplate <class T>T Accumulate( T a[] , int count ) {    T value = 0;    for( int i=0; i<count; ++i) { value += a[i]; }    return value;}int main(){    //----- Templated version of SmartFloat    SmartValue<double> y[] = { 10,20.0,30,40 };    double res = Accumulate(y,4);    cout << res << endl;}

The C++ programming language supports different programming paradigms and the three principles outlined ...