Unknown symbols in function calls are not highlighted?

[etiennebacher]

I noticed some potential inconsistency in the way unknown symbols are highlighted by the LSP:

hello # "No symbol named 'hello' in scope."

if (hello) { # "No symbol named 'hello' in scope."
  TRUE
}

sum(hello) # No highlight

This looks like a bug and I didn't find a related issue but maybe I missed something?

[DavisVaughan]

Because of non standard evaluation in R, it is incredibly hard to know if sum(hello) is going to treat hello as if it is coming from the surrounding environment, or if sum() itself is going to quote() that first input, which would mean this would be totally valid R code. So right now we choose not to do anything until we have better tools for this.

So I'd say it's not a bug, it's a current limitation in our system that we are very aware of, but we haven't felt the need to open a whole bunch of issues related to this.

[etiennebacher]

it's a current limitation in our system that we are very aware of

Ok so I suppose this is tracked elsewhere and I'm marking this discussion as "answered".

Thanks for the explanation!