romainfrancois commented on pull request #8256:
URL: https://github.com/apache/arrow/pull/8256#issuecomment-698439528
> I love this and I want this everywhere :)
I sort of assumed you would go there, as I was working on #8246 too. So in
short we would create the R6 object in C++ and don't have to manipulate the
external pointers in R ? I can see the appeal, but I need to work out some
logistics.
We would retain the same signatures ? e.g.
```cpp
// [[arrow::export]]
std::shared_ptr<arrow::DataType> Int8__initialize() { return arrow::int8(); }
```
presently before this goes to R, this is wrapped in the external pointer, so
we have a `cpp11::external_pointer<std::shared_ptr<arrow::DataType>>`, then in
the R side it gets wrapped into a (subclass of) `DataType`, but I suppose that
we could have that the `std::shared_ptr<arrow::DataType>` is directly wrapped
to the correct R6 instance or NULL, this is essentially moving the weird
`..dispatch` method down C++ layer.
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