R Under development (unstable) (2024-01-23 r85822 ucrt) -- "Unsuffered Consequences"
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> message("TESTING: InternalErrorException...")
TESTING: InternalErrorException...
> 
> 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

> 
> ex <- InternalErrorException("Hmm... I didn't expect this!")
> print(ex)
[2024-01-24 05:46:42.446258] InternalErrorException: Hmm... I didn't expect this! This error is likely to be due to an internal error. Do not forget to report that you are using R v4.4.0 on a x86_64-w64-mingw32 platform together with R.oo v1.26.0.

  at #03. Exception(...)
          - Exception() is in environment 'R.oo'

  at #02. extend(Exception(...), "InternalErrorException", .package = package)
          - extend() is in environment 'R.oo'

  at #01. InternalErrorException("Hmm... I didn't expect this!")
          - InternalErrorException() is in environment 'R.oo'

> 
> ex2 <- InternalErrorException("Hmm... I didn't expect this!", package=R.oo)
> print(ex2)
[2024-01-24 05:46:42.481317] InternalErrorException: Hmm... I didn't expect this! This error is likely to be due to an internal error related to package R.oo v1.26.0. Please report this problem to the maintainer Henrik Bengtsson or the author Henrik Bengtsson of that package. Do not forget to report that you are using R v4.4.0 on a x86_64-w64-mingw32 platform together with R.oo v1.26.0.

  at #03. Exception(...)
          - Exception() is in environment 'R.oo'

  at #02. extend(Exception(...), "InternalErrorException", .package = package)
          - extend() is in environment 'R.oo'

  at #01. InternalErrorException("Hmm... I didn't expect this!", package = R.oo)
          - InternalErrorException() is in environment 'R.oo'

> 
> ex3 <- InternalErrorException("Hmm... I didn't expect this!", package="R.oo")
> print(ex3)
[2024-01-24 05:46:42.505926] InternalErrorException: Hmm... I didn't expect this! This error is likely to be due to an internal error related to package R.oo v1.26.0. Please report this problem to the maintainer Henrik Bengtsson or the author Henrik Bengtsson of that package. Do not forget to report that you are using R v4.4.0 on a x86_64-w64-mingw32 platform together with R.oo v1.26.0.

  at #03. Exception(...)
          - Exception() is in environment 'R.oo'

  at #02. extend(Exception(...), "InternalErrorException", .package = package)
          - extend() is in environment 'R.oo'

  at #01. InternalErrorException("Hmm... I didn't expect this!", package = "R.oo")
          - InternalErrorException() is in environment 'R.oo'

> 
> 
> myLog <- function(x, ...) {
+   if (!is.numeric(x)) {
+     throw(InternalErrorException("Argument 'x' to myLog() is not numeric: ",
+                                                  mode(x), package=R.oo))
+   }
+   log(x, ...)
+ }
> 
> 
> myLog(2)
[1] 0.6931472
> 
> ex <- NULL
> tryCatch({
+   myLog("a")
+ }, error= function(ex) {
+   ex <- Exception$getLastException()
+ })
> 
> message("TESTING: InternalErrorException...DONE")
TESTING: InternalErrorException...DONE
> 
> proc.time()
   user  system elapsed 
   0.34    0.12    0.43