});

// Signal values can be accessed imperativly at any time,

// but only VarSignals can be directly manipulated.

cout << "area: " << area.Value() << endl; // => area: 2

// Width changed, so area is re-calculated automatically

Event streams represent flows of discrete values. They are first-class objects and can be merged, filtered, transformed or composed to more complex types:

using namespace std;

using namespace react;