Function euclidean_sqr

include/rabitqlib/utils/space.hpp:130–134

    for (size_t i = 0; i < length; i += kTypeBits) {
        T cur = 0;
        for (size_t j = 0; j < kTypeBits; ++j) {
            cur |= (static_cast<T>(binary_code[i + j]) << (kTypeBits - 1 - j));
        }
        *compact_code = cur;
        ++compact_code;
    }
}