R Under development (unstable) (2024-01-23 r85822 ucrt) -- "Unsuffered Consequences"
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> message("TESTING: throw()...")
TESTING: throw()...
> 
> library("R.oo")
Loading required package: R.methodsS3
R.methodsS3 v1.8.2 (2022-06-13 22:00:14 UTC) successfully loaded. See ?R.methodsS3 for help.
R.oo v1.26.0 successfully loaded. See ?R.oo for help.

Attaching package: 'R.oo'

The following object is masked from 'package:R.methodsS3':

    throw

The following objects are masked from 'package:methods':

    getClasses, getMethods

The following objects are masked from 'package:base':

    attach, detach, load, save

> 
> ## Generate an error
> ex <- tryCatch({
+   stop("An error")
+ }, error = function(ex) {
+   ex
+ })
> print(ex)
<simpleError in doTryCatch(return(expr), name, parentenv, handler): An error>
> 
> ## Re-throw the error
> ex2 <- tryCatch({
+   throw(ex)
+ }, error = function(ex) {
+   ex
+ })
> print(ex2)
<simpleError in doTryCatch(return(expr), name, parentenv, handler): An error>
> 
> stopifnot(identical(ex2, ex))
> 
> 
> ## Generate an Exception
> ex <- tryCatch({
+   throw("An error")
+ }, error = function(ex) {
+   ex
+ })
> print(ex)
[2024-01-24 05:46:50.426886] Exception: An error
> 
> ## Re-throw the Exception
> ex2 <- tryCatch({
+   throw(ex)
+ }, error = function(ex) {
+   ex
+ })
> print(ex2)
[2024-01-24 05:46:50.426886] Exception: An error
> 
> stopifnot(identical(ex2, ex))
> 
> 
> message("TESTING: throw()...DONE")
TESTING: throw()...DONE
> 
> proc.time()
   user  system elapsed 
   0.25    0.10    0.34