Should we add an accessor for `integer64`?

[lacyhamilton]

Should we add an accessor for integer64?

#define INTEGER64(x) ((int64_t *) REAL(x))
#define INTEGER64_RO(x) ((const int64_t *) REAL_RO(x))

Referencing #7618 (link) in {data.table} repository.

We are a group of students working on this issue in {data.table} for our NAU Open-Source project and have the accessor working in the {data.table} library. We are wondering if this would be better to add here instead?

[MichaelChirico]

I'll revisit this after the current release is done

[ben-schwen]

You might want to look into how to use Linking to from Writing R Extensions.