John Mount
2017-Mar-18 18:47 UTC
[Rd] Red: RFC: (in-principle) native unquoting for standard evaluation
Obviously we have to be sensitive about language and parser changes. However, I think Jonathan Carroll has identified a feature that is well understood in the Lisp world (quoting and unquoting) that is missing from the R language. Some symbol that indirects to a value (only once!, we don?t want this chaining; and there are issues of quoting it out) in eval would be very valuable. Obviously it is most useful where non-standard evaluation is emphasized (plotting, formulas, and dplyr being the examples that I can immediately think of). --------------- John Mount http://www.win-vector.com/ <http://www.win-vector.com/> Our book: Practical Data Science with R https://www.manning.com/books/practical-data-science-with-r <https://www.manning.com/books/practical-data-science-with-r> [[alternative HTML version deleted]]