Can't use attachInterrupt in a library

Question

I\'m writing a simple library for an ultrasonic distance sensor and thought i\'d try using interrupts.

However i can\'t set my functions in the attachCallback<

Answer 1

I got around this by making a singleton base class which represents the hardware as a whole (which kinda makes sense in this situation anyway).

Any function pointers can then be passed to the sub-component class, and handled by the singleton, whose member variables and methods are all static.

Example headers (untested):

// Sub-component
class LampButton {
public:
    LampButton(int pin, void(*pushHandler)());
}

// Sub-component
class LampLed {
public:
    LampLed(int pin);
    void toggle();
}

// Singleton represents the hardware in it's entirety
class Lamp {
public:
    // Call this instead of a constructor
    static void initialize(int buttonPin, int ledPin);

    // Function implemented inline for clarity - don't do this
    static void handleButtonPush() {
        led.toggle();
    }

private:
    static LampButton button;
    static LampLed led;
}