There is some consolidation work to be done. The
core of the change is getRClassName2, which will
probably eventually replace getRClassName.
getRClassName seems to be in a funny state, with
a middle argument that is commented out and never
used.
My next step is to verify whether the new version
can replace it.
This test exercises many complex cases for enumerations in R.
References to enums currently fail and will be addressed in
the next patch.
Anonymous enums are not supported.
There are some strange corner cases that could be seen as
doing strange things in R. enums are allowed to have the
same underlying integer representation on the C side. This
means that the R structure ends up with two names for the
same integer, which in turn means that the reverse lookup
isn't unique. I don't think this matters. I'll add some
of these cases to the documentation.
