How to generate an R warning safely in Rcpp

Question

We know that calling Rf_error() should be avoided in Rcpp as it involves a longjmp over C++ destructors on the stack. This is why we rather throw C++ exceptions in

Answer 1

One of the solutions I came up with involves calling the R's warning function from Rcpp:

// [[Rcpp::export]]
void test() {
   Test t;
   Function warning("warning");
   warning("test"); // here R errors are caught and transformed to C++ exceptions
}

which gives the correct behavior if warn>2:

start
end
Error in eval(expr, envir, enclos) : (converted from warning) test

I wonder if anybody has a better idea for that.