Iterating a set of bits (bit mask, bit field). Useful for indexing arrays using bit values without actually using bit values as index values

implementation.m

typedef NS_OPTIONS(uint8_t, CaptureDeviceConfigurationControlPropertyBit) {
    CaptureDeviceConfigurationControlPropertyBitTorchLevel       = 1<< 0,
    CaptureDeviceConfigurationControlPropertyBitLensPosition     = 1<< 1,
    CaptureDeviceConfigurationControlPropertyBitExposureDuration = 1<< 2,
    CaptureDeviceConfigurationControlPropertyBitISO              = 1<< 3,
    CaptureDeviceConfigurationControlPropertyBitZoomFactor       = 1<< 4,
};

typedef CaptureDeviceConfigurationControlPropertyBit CaptureDeviceConfigurationControlPropertyBitMask;
CaptureDeviceConfigurationControlPropertyBitMask mask = (CaptureDeviceConfigurationControlPropertyBitTorchLevel |
                                                         CaptureDeviceConfigurationControlPropertyBitLensPosition|
                                                         CaptureDeviceConfigurationControlPropertyBitExposureDuration|
                                                         CaptureDeviceConfigurationControlPropertyBitISO|
                                                         CaptureDeviceConfigurationControlPropertyBitZoomFactor);
                                                             
do{
	printf("mask\t==\t%d\n", (CaptureDeviceConfigurationControlPropertyBitMask)mask);
} while((mask ^= mask & (0- mask)) != 0.0);