On Mon, Apr 13, 2020 at 9:23 AM Gabriel Becker <gabembec...@gmail.com> wrote: [...] > This means the only feasible way to detect it, which a few projects do I > believe, is process the code while it is still raw text, before it goes into > the parser, and have clever enough regular expressions.
Well, especially considering R's news raw strings with user defined delimiters, regular expressions are not the best here, I think. OTOH the source references do keep the right assignment. So if you can re-parse the data, you can detect them: ❯ x <- parse(text = "A -> B", keep.source=FALSE) ❯ x expression(B <- A) ❯ x <- parse(text = "A -> B") ❯ x expression(A -> B) ❯ getParseData(x) line1 col1 line2 col2 id parent token terminal text 7 1 1 1 6 7 0 expr FALSE 1 1 1 1 1 1 3 SYMBOL TRUE A 3 1 1 1 1 3 7 expr FALSE 2 1 3 1 4 2 7 RIGHT_ASSIGN TRUE -> 4 1 6 1 6 4 6 SYMBOL TRUE B 6 1 6 1 6 6 7 expr FALSE Gabor [...] ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
