Function FastBoundsCheck

tensorflow/core/framework/bounds_check.h:30–37

// critical contexts where 0 <= index < limit is almost always true.
template <typename Ta, typename Tb>
EIGEN_ALWAYS_INLINE EIGEN_DEVICE_FUNC bool FastBoundsCheck(const Ta index,
                                                           const Tb limit) {
  static_assert(std::is_integral<Ta>::value && std::is_integral<Tb>::value,
                "FastBoundsCheck can only be used on integer types.");
  typedef typename std::make_unsigned<decltype(index + limit)>::type UIndex;
  return TF_PREDICT_TRUE(static_cast<UIndex>(index) <
                         static_cast<UIndex>(limit));
}

namespace internal {
// Ensure that the compiler cannot elide a copy into a local, for