Reattivo is a Functional Reactive Programming (FRP) library for the Arduino platform... well sort of. C++ aint exactly functional, so we use objects, but we do make stuff happen by chaining function calls together.

This library is very immature, so will probably change unrecognisably before it's done.

No docs yet, but here's a simple example sketch to get you going.

#include <reattivo.h>

DigitalOutput led(6);
DigitalInput  sw(16);
Toggler       t(false);
EdgeDetector  ed;
Debouncer     d;

void setup() {}

void loop() {
  led.write(t.toggle(ed.risingEdge(d.debounce(20, sw.read()))));
}

All feedback welcome - I'm a Haskell programmer, who hasn't done C++ for many years, so apologies if my code sucks.