I did not want to bother you, but I tried to use "google" as much as I could to find the answer, but I was not able to.
Year, maybe later, back, after update to Rstudio version 1.1 RStudio has lost for me ability to autocomplete in Rcpp. I hoped, it was a buck and was waiting to repair this feature. I did not change anything in settings. After many reinstalls a trying some desperate things here is the problem I have.
Right now I have two installations of RStudio, version 1.2.1335 and 0.99.903 (I did the same on two computers, the first has Windows 7, the second has Windows 10), same default settings. On both computers same problem.
Version 0.99.903 automplete without problem

Version 1.2.1335 - no autocomplete
Does anyone any clue, what I am supposed to do, to use autocompletion in Rcpp in new RStudio version? Need to say, that standard R files autocomplete without any problems.
Thank you a lot
Honza