It's come up for me when I do FFI stuff. For GUI stuff I usually just want to suppress, but it's possible that you'd want to detect visibility if you were to make the GUI more programmable. I usually end up having to work around the whole business by fiddling with R_Visible.
Speaking of R_tryEval, can someone with the appropriate powers PRETTY PLEASE just make it an official API? Having it continue to be unofficial is just getting silly. On 4/6/07, Luke Tierney <[EMAIL PROTECTED]> wrote: > Even though it isn't officially part of the API it has seen some use > so I'd prefer not to change the interface; instead add > > SEXP R_tryEvalWithVis(SEXP e, SEXP env, int *ErrorOccurred, int *visible); > > or something along those lines and define R_tryEval internally in > terms of that. > > It may be worth thinking a bit more though to see if there is > something else that might be useful at this point. I vaguely recall > thinking recently about needing something else of this flavor but I > can't seem to remember what it was exactly -- will try to see if I can > recall. > > Best, > > luke > > > On Fri, 6 Apr 2007, Deepayan Sarkar wrote: > > > Hi, > > > > R_tryEval, exported in Rinternals.h but not part of the API, is > > currently defined as: > > > > R_tryEval(SEXP e, SEXP env, int *ErrorOccurred); > > > > I'm trying to embed R in an application (basically yet another GUI), > > and this has been very helpful to catch errors. It would be even more > > helpful if it also gave access to the visibility flag. I can wrap this > > in a call to withVisible, and that works great, but if there is an > > error, traceback() contains a bunch of irrelevant levels. > > > > It seems fairly easy to add another argument, similar to > > ErrorOccurred, that is set to the visibility flag before returning. Is > > this something that could be considered for addition in R-devel? A > > possible patch for R/trunk is attached. Mac-GUI/REngine/REngine.m will > > also need a patch, but I don't understand the language it's written > > in. > > > > -Deepayan > > > > -- > Luke Tierney > Chair, Statistics and Actuarial Science > 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: [EMAIL PROTECTED] > 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 > -- Byron Ellis ([EMAIL PROTECTED]) "Oook" -- The Librarian ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
