template deduction

[pdk5]

Hello,

I have following piece of template code,

void PredictionRaster::AutoSetSetIllegalValueIfRequired(PRED_DATA_TYPE pdt, AIBaseRaster *pRaster)
{
	ASSERT(pRaster);
	if (!pRaster)
	{
		return;
	}
	switch (pdt)
	{
	case PR_DATA_UCHAR_OVERRIDEFILL:
	{
		const unsigned char MAX_LOSS = 200;
		SetIllegalValue(pRaster, MAX_LOSS);
	}
	break;
	case PR_DATA_USHORT_OVERRIDEFILL:
	{
		const unsigned short NO_BEAM_INDEX = USHRT_MAX;
		SetIllegalValue(pRaster, NO_BEAM_INDEX);
	}
	case PR_DATA_UCHAR_METRICS_OVERRIDEFILL:
		SetIllegalValue<unsigned char>(pRaster, 0);
	break;
	}
}

template<typename RastType> void PredictionRaster::SetIllegalValue(AIBaseRaster *pRaster, RastType illegalValue)
{
	auto pTypedRaster = dynamic_cast<RasterT<RastType>*>(pRaster);
	if (pTypedRaster)
	{
		pTypedRaster->OverrideIllegalValue(illegalValue);
	}
}

I dont know how the template param in the red coloured line is being used ?

Could you please explain me ? This is some legacy code

I also have another doubt in same area, may be post later once this is resolved

thanks a lot

thanks
Priya