Function UnaryOpVariant

tensorflow/core/framework/variant_op_registry.h:265–276

//
template <typename Device>
Status UnaryOpVariant(OpKernelContext* ctx, VariantUnaryOp op, const Variant& v,
                      Variant* v_out) {
  const string& device = DeviceName<Device>::value;
  UnaryVariantOpRegistry::VariantUnaryOpFn* unary_op_fn =
      UnaryVariantOpRegistry::Global()->GetUnaryOpFn(op, device, v.TypeId());
  if (unary_op_fn == nullptr) {
    return errors::Internal(
        "No unary variant unary_op function found for unary variant op enum: ",
        op, " Variant type_name: ", v.TypeName(), " for device type: ", device);
  }
  return (*unary_op_fn)(ctx, v, v_out);
}

// Sets *out = binary_op(a, b).  The variants a and b must be the same type
// and have a registered binary_op function for the given Device.  Returns an