rcallback.RdThis shim sits between the C++ world and the R world. I.e. this R function gets called from the C++ code. Calls are then made from here to the R callback function.
rcallback(device_call, state, args)
| device_call | name of device call |
|---|---|
| state | list of rdata, dd and gc |
| args | args to the device call |
This shim should do the heavy lifting in terms of error checking to ensure that errors aren't propogated back to the C++ execution (because if that happens we get a segmentation fault!)
It should also do sanity checking of return objects i.e. is 'rdata' still a list?
TODO: Could then do signatures of the input state and the return values and only include them in the return object if things have changed?