Handle ALTREP classes defined in other packages #231
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Add these functions:
get_altrep_class_name()get_altrep_package_name()get_altrep_body_mut_unchecked()get_altrep_body_ref_unchecked()This should enable zero-copy conversion between ALTREP types like Apache Arrow owns. That said, I'm not sure if this is a valid way. Since
R_altrep_class_tis not exposed, we have no choice to check the class name and the package name, but I'm not sure if it's enough.cf. https://github.com/apache/arrow-nanoarrow/blob/main/r/src/altrep.h