constexpr char char_at_()

in cxx/fbjni/detail/SimpleFixedString.h [171:180]

• 10 lines of code
• 3 McCabe index (conditional complexity)

constexpr char char_at_(
    const Left& left,
    std::size_t left_count,
    const Right& right,
    std::size_t right_count,
    std::size_t i) noexcept {
  return i < left_count
      ? left[i]
      : i < (left_count + right_count) ? right[i - left_count] : '\0';
}