extendr-engine

This crate is mostly use for testing extendr-api. See extendr-api for more details.

lib.rs:

A sigleton instance of the R interpreter.

Only call this from main() if you want to run stand-alone.

Its principal use is for testing.

See https://github.com/wch/r-source/blob/trunk/src/unix/Rembedded.c