Thank you Luke for prompt reply. Is it possible then to request a new function to R C API "message" that would equivalent to R "message" function? Similarly as we now have C "warning" and C "error" functions.
Best, Jan On Sun, Sep 15, 2019 at 5:25 PM Tierney, Luke <luke-tier...@uiowa.edu> wrote: > > On Sun, 15 Sep 2019, Jan Gorecki wrote: > > > Dear R-devel community, > > > > There appears to be an inconsistency in R C API about the exceptions > > that can be raised from C code. > > Mapping of R C funs to corresponding R functions is as follows. > > > > error -> stop > > warning -> warning > > REprintf -> message > > This is wrong: REpintf is like cat with file = stderr(). If this claim > is made somewhere in R documentation please report it a a bug. > > > Rprintf -> cat > > > > Rprint/cat is of course not an exception, I listed it just for completeness. > > The inconsistency I would like to report is about REprintf. It cannot > > be caught by tryCatch(message). Warnings are errors are being caught > > as expected. > > > > Is there any chance to "fix"/"improve" REprintf so tryCatch(message) > > can catch it? > > No: this is behaving as intended. > > Best, > > luke > > > So in the example below catch(Cmessage()) would behave consistently to > > R's catch(message("a"))? > > > > Regards, > > Jan Gorecki > > > > catch = function(expr) { > > tryCatch(expr, > > message=function(m) cat("caught message\n"), > > warning=function(w) cat("caught warning\n"), > > error=function(e) cat("caught error\n") > > ) > > } > > library(inline) > > Cstop = cfunction(c(), 'error("%s\\n","a"); return R_NilValue;') > > Cwarning = cfunction(c(), 'warning("%s\\n","a"); return R_NilValue;') > > Cmessage = cfunction(c(), 'REprintf("%s\\n","a"); return R_NilValue;') > > > > catch(stop("a")) > > #caught error > > catch(warning("a")) > > #caught warning > > catch(message("a")) > > #caught message > > > > catch(Cstop()) > > #caught error > > catch(Cwarning()) > > #caught warning > > catch(Cmessage()) > > #a > > #NULL > > > > ______________________________________________ > > R-devel@r-project.org mailing list > > https://stat.ethz.ch/mailman/listinfo/r-devel > > > > -- > 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