Method operator()

cpp/src/arrow/util/bit_util_test.cc:184–188

// GenerateBitsUnrolled.
struct VisitBitsFunctor {
  void operator()(const uint8_t* bitmap, int64_t start_offset, int64_t length,
                  bool* destination) {
    auto writer = [&](const bool& bit_value) { *destination++ = bit_value; };
    return internal::VisitBits(bitmap, start_offset, length, writer);
  }
};

struct VisitBitsUnrolledFunctor {