Class base

tensorflow/core/kernels/cwise_ops.h:704–732

// output scalar type is R.
template <typename T, typename F, typename R = T>
struct base {
  // func defines operator() and its vectorized version packetOp().
  typedef F func;

  // If true, the functor's corresponding binary op will instantiate
  // specialized kernels to perform an optimized broadcast
  // operation. Each functor for which this is enabled increases the
  // code size, so by default this is disabled for binary functors and
  // is enabled on a per-op basis as needed.
  static const bool use_bcast_optimization = false;

  // operator() has the signature:
  //  out_type operator()(in_type in0, in_type in1 ...)
  typedef R out_type;
  typedef T in_type;

  // TensorFlow provides tensor-ized version of "func". Roughly
  // speaking, the tensorflow operation has the signature:
  //   tout_type op(tin_type in0)
  //   tout_type op(tin_type in0, tin_type in1)
  //   tout_type op(tin_type in0, in_type scalar)
  typedef typename TTypes<out_type>::Flat tout_type;
  typedef typename TTypes<in_type>::ConstFlat tin_type;
  typedef typename TTypes<in_type>::ConstScalar tscalar_type;

  // Whether the functor can error out.  Currently applies only to integer
  // div and mod.
  static const bool has_errors = false;
};

// For now, we only apply certain speed optimization for
// float/double's broadcast binary op.