create_multi_key_comparator()

template<typename T >

auto MayaFlux::Yantra::create_multi_key_comparator

(

const std::vector< SortKey > &

keys

)

Creates a multi-key comparator for complex sorting.

Template Parameters

T	Data type being sorted

Parameters

keys	Vector of sort keys with extractors and weights

Returns

Lambda comparator that applies all keys in order

Definition at line 152 of file SortingHelper.hpp.

{
    return [keys](const T& a, const T& b) -> bool {
        for (const auto& key : keys) {
            try {
                double val_a = key.extractor(std::any(a));
                double val_b = key.extractor(std::any(b));
 
                if (key.normalize) {
                    val_a = std::tanh(val_a);
                    val_b = std::tanh(val_b);
                }
 
                double weighted_diff = key.weight * (val_a - val_b);
                if (std::abs(weighted_diff) > 1e-9) {
                    return key.direction == SortingDirection::ASCENDING ? weighted_diff < 0 : weighted_diff > 0;
                }
            } catch (...) {
                continue;
            }
        }
        return false;
    };
}

References a, and b.