Thanks Luke, On 10 September 2015 at 14:47, <luke-tier...@uiowa.edu> wrote: > Conditions have classes and the condition system is designed around > the idea that classes would be used for this sort of thing. That is > already how tryCatch and withCallingHandlers discriminate the > conditions to handle.
That makes sense. Though with my sqrt example, it's just a plain simpleWarning, which doesn't give you the opportunity to do special handling. tryCatch(sqrt(-1), warning = function(w) class(w)) ## [1] "simpleWarning" "warning" "condition" > Designing and implementing a condition class hierarchy to support this > is indeed the hard/tedious part. There are precedents from other languages that could be used as a template. For example, .NET and Java both have very well defined exception hierarchies that could serve as a starting point. https://msdn.microsoft.com/en-us/library/z4c5tckx%28v=vs.110%29.aspx https://docs.oracle.com/javase/7/docs/api/java/lang/package-tree.html Who is the best person to ask/cajole to start getting this implemented? -- Regards, Richie Learning R 4dpiecharts.com ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
