On Sun, 15 Dec 2019 10:47:11 +0000
Dan Kortschak <dan.kortsc...@adelaide.edu.au> wrote:

> I'd like to see the source definition of R_NilValue, but after
> fair bit of searching I cannot find an obviously location for this.
> 
> Would someone please point me in the right direction?

As far as I understand, the assignment to R_NilValue happens in
src/main/memory.c:

https://github.com/wch/r-source/blob/776929704cb4f9398f52805f48f2c93582ec3d38/src/main/memory.c#L2186

(see the definition of GET_FREE_NODE(s) in the same file)

Besides declaring R_NulValue as "extern" and assignments in void
InitMemory(), there doesn't seem to be anything else.

-- 
Best regards,
Ivan

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