}
			return err
		}
	case reflect.Float32, reflect.Float64:
		field.Set = func(ctx context.Context, value reflect.Value, v interface{}) (err error) {
			switch data := v.(type) {
			case **float64:
				if data != nil && *data != nil {
					field.ReflectValueOf(ctx, value).SetFloat(**data)
				}
			case **float32:
				if data != nil && *data != nil {

2.718281828459045   float32     2.718281828459045 rounds to 2.7182817 which is in the set of float32 values
-1e-1000            float64     -1e-1000 rounds to IEEE -0.0 which is further simplified to 0.0
0i                  int         0 is an integer value
(42 + 0i)           float32     42.0 (with zero imaginary part) is in the set of float32 values
</pre>

<pre>

  ASSERT_EQ(TF_OK, TF_GetCode(s.get())) << TF_Message(s.get());
  ASSERT_NE(*func, nullptr);
}

REGISTER_OP("CustomOp")
    .Output("output: float32")
    .Attr("index: int")
    .SetShapeFn(tensorflow::shape_inference::UnknownShape);

void NodeWithPlaceholderAttrHelper(TF_Graph* graph, TF_Status* s,