Function CheckFeaturesByType

catboost/libs/data/objects.cpp:2065–2186

template <class TColumn>
static void CheckFeaturesByType(
    EFeatureType featureType,
    // not TConstArrayRef to allow template parameter deduction
    const TVector<THolder<TColumn>>& data,
    const TExclusiveFeatureBundlesData& exclusiveFeatureBundlesData,
    const TPackedBinaryFeaturesData& packedBinaryFeaturesData,
    const TFeatureGroupsData& featuresGroupsData,
    const TStringBuf featureTypeName
) {
    const auto& packedBinaryToSrcIndex = packedBinaryFeaturesData.PackedBinaryToSrcIndex;
    const auto& bundlesMetaData = exclusiveFeatureBundlesData.MetaData;
    const auto& featuresGroupsMetaData = featuresGroupsData.MetaData;

    for (auto featureIdx : xrange(data.size())) {
        auto* dataPtr = data[featureIdx].Get();
        if (!dataPtr) {
            continue;
        }

        auto maybePackedBinaryIndex
            = packedBinaryFeaturesData.FlatFeatureIndexToPackedBinaryIndex[dataPtr->GetId()];
        auto maybeBundlePart
            = exclusiveFeatureBundlesData.FlatFeatureIndexToBundlePart[dataPtr->GetId()];
        auto maybeGroupPart
            = featuresGroupsData.FlatFeatureIndexToGroupPart[dataPtr->GetId()];

        CB_ENSURE_INTERNAL(
            maybePackedBinaryIndex.Defined() + maybeBundlePart.Defined() + maybeGroupPart.Defined() <= 1,
            "Data." << featureType << "Features[" << featureIdx
            << "] was mis-included into more than one aggregated column"
        );

        if (maybePackedBinaryIndex) {
            auto requiredTypePtr
                = dynamic_cast<TPackedBinaryValuesHolderImpl<TColumn>*>(dataPtr);
            CB_ENSURE_INTERNAL(
                requiredTypePtr,
                "Data." << featureType << "Features[" << featureIdx << "] is not of type "
                "TPackedBinaryValuesHolderImpl"
            );

            auto linearPackedBinaryFeatureIdx = maybePackedBinaryIndex->GetLinearIdx();
            CB_ENSURE_INTERNAL(
                linearPackedBinaryFeatureIdx < packedBinaryToSrcIndex.size(),
                "linearPackedBinaryFeatureIdx (" << linearPackedBinaryFeatureIdx << ") is greater than "
                "packedBinaryToSrcIndex.size (" << packedBinaryToSrcIndex.size() << ')'
            );
            auto srcFeature = packedBinaryToSrcIndex[linearPackedBinaryFeatureIdx];
            CB_ENSURE_INTERNAL(
                srcFeature.FeatureType == featureType,
                "packedBinaryToSrcIndex[" << linearPackedBinaryFeatureIdx << "] type is not "
                << featureType
            );
            CB_ENSURE_INTERNAL(
                srcFeature.FeatureIdx == featureIdx,
                "packedBinaryToSrcIndex[" << linearPackedBinaryFeatureIdx << "] feature index is not "
                << featureIdx
            );