I looks like you may have misunderstood my post so just to make sure: There will be no patch to R to support this.
If this is something you want for yourself, then I have shown you how you can do it. You can put the code in a startup file if you like. If you want your students to have this, then you can prepare a startup file for them that does this. Best, luke On Thu, 21 May 2020, Juan Telleria Ruiz de Aguirre wrote:
Thank you Mr. Tierney! Using globalCallingHandlers() to directly handle "packageConflictError" is an excellent idea! The benefits I see for such an implementation are: * The patch would be contained within the Conflict Error Handler, which should reduce any side effects with an eventual implementation. * And by making its usage optional, by setting for example options(conflicts.policy.ask = TRUE), in should neither affect any packages nor other base code. Hope it allows R Users to work in a more agile manner, and guide R Students through best practices of variable conflict handling in an educative manner. Thanks, JuanYou can get what you are asking for now in R 4.0.0 with globalCallingHandlers and using the packageConflictError object that is signaled. This should get you started: ``` options(conflicts.policy = "strict") packageConflictError handle_conflicts <- function(e) { cat(conditionMessage(e)) opt <- readline(prompt="1: mask.ok; 2: exclude. Choose: ") if (opt == "1") conflictRules(e$package, mask.ok = as.character(unlist(e$conflicts))) else if (opt == "2") conflictRules(e$package, exclude = as.character(unlist(e$conflicts))) stop("unresolved conflicts") ## ideal invode a restart here } globalCallingHandlers(packageConflictError = handle_conflicts) library(dplyr) ``` An IDE could provide a more sophisticated interface, like a dialog allowing separate choices for each conflict. But this is best left up to the IDE or the user. The one addition to library that might be worth considering is to provide a restart for the handler to invoke. Best, luke
-- Luke Tierney Ralph E. Wareham Professor of Mathematical Sciences University of Iowa Phone: 319-335-3386 Department of Statistics and Fax: 319-335-3017 Actuarial Science 241 Schaeffer Hall email: luke-tier...@uiowa.edu Iowa City, IA 52242 WWW: http://www.stat.uiowa.edu ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
