Finding Function Calls in R Code

Yesterday I learned an unexpected but interesting use of the highr package from a Github issue. This package is intended for syntax highlighting R code, but the user wanted to identify function calls from given R code. What he did was to first syntax highlight the code, and then look for LaTeX code \kwd{} in the result. I told him that this task could be done with getParseData(), but there were a few edge cases. For example:

getParseData(parse(text = …