Function QuantizeBlock

catboost/private/libs/quantization/utils.h:89–105

    // TODO(kirillovs): replace with effective block-quantizer from model evaluation code
    template <typename TQuantizedBin>
    void QuantizeBlock(TConstArrayRef<float> srcFeatureData,
                  bool allowNans,
                  ENanMode nanMode,
                  ui32 featureIdx, // for error message

                  // if nanMode != ENanMode::Forbidden borders must include -min_float or +max_float
                  TConstArrayRef<float> borders,
                  TArrayRef<TQuantizedBin> quantizedData) {
        Y_ASSERT(srcFeatureData.size() == quantizedData.size());
        for (size_t i : xrange(srcFeatureData.size())) {
            quantizedData[i] = Quantize<TQuantizedBin>(featureIdx,
                                                         allowNans,
                                                         nanMode,
                                                         borders,
                                                         srcFeatureData[i]);
        }
    }

    template <typename TQuantizedBin>
    void Quantize(const ITypedArraySubset<float>& srcFeatureData,