runEvery (the next Blink Without Delay)

Development Libraries
8

I have a solution. I created a type to calculate the smallest unsigned integer for a given constant integer value, applied to your macro, it seems to work well. Also the gcc specific typeof is not needed now, but 't' has to be a constant.

template <bool _Flag, typename _True, typename _False> struct If{ typedef _True Result; };
template <typename _True, typename _False> struct If<false, _True, _False>{ typedef _False Result; };

template< uint64_t _Number >
  class BestFitUInt{
    protected:
      enum{
        T64 = _Number >> 0x20,
        T32 = _Number >> 0x10,
        T16 = _Number >> 0x08,
      };
      typedef typename If< T16, uint16_t, uint8_t >::Result TypeB;
      typedef typename If< T32, uint32_t, TypeB >::Result   TypeA;
    private:
    public:
      typedef typename If< T64, uint64_t, TypeA >::Result   Result;
};
#define BFUI(n) BestFitUInt< n >::Result

#define runEvery(t) for (static  BFUI(t) _lasttime;\
                         (BFUI(t))((BFUI(t))millis() - _lasttime) >= (t);\
                         _lasttime += (t))



void setup(){
  Serial.begin(9600);
};

void loop() {
  runEvery(500) Serial.println("500 milliseconds have passed since last printed");

  runEvery(100) {
    Serial.print("Sensor Value: ");
    Serial.println(analogRead(A1));
  }
}