Function CheckForOverflow

tensorflow/python/lib/core/py_seq_tensor.cc:381–384

// Returns `true` if `out` overflows when converted from `as_double`.
template <class T>
static inline bool CheckForOverflow(double as_double, T* out) {
  return (sizeof(T) < sizeof(double) && std::isinf(*out) &&
          std::isfinite(as_double));
}

// There is no `std::isinf` that takes `Eigen::half` as argument but Eigen
// provides `Eigen::half_impl::isinf` instead.