Function implicit_zero

src/Common/examples/average.cpp:135–151

Float NO_INLINE implicit_zero(const PODArray<UInt8> & keys, const PODArray<Float> & values)
{
    Arena arena;
    FixedImplicitZeroHashMap<UInt8, StatePtr> map;

    size_t size = keys.size();
    for (size_t i = 0; i < size; ++i)
    {
        StatePtr & place = map[keys[i]];
        if (unlikely(!place))
            place = new (arena.alloc<State>()) State();

        place->add(values[i]);
    }

    return map[0] ? map[0]->result() : 0;
}


template <typename Key, typename Mapped>