R Under development (unstable) (2023-11-16 r85542 ucrt) -- "Unsuffered Consequences"
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> library("R.utils")
Loading required package: 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 v1.25.0 (2022-06-12 02:20:02 UTC) 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

R.utils v2.12.3 successfully loaded. See ?R.utils for help.

Attaching package: 'R.utils'

The following object is masked from 'package:utils':

    timestamp

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

    cat, commandArgs, getOption, isOpen, nullfile, parse, warnings

> 
> # Load settings from file, or create default settings
> basename <- "some.settings"
> settings <- Settings$loadAnywhere(basename)
> 
> if (is.null(settings))
+   settings <- Settings(basename)
> 
> print(isModified(settings))
[1] FALSE
> 
> # Set default options, if missing.
> setOption(settings, "graphics/verbose", TRUE, overwrite=FALSE)
> setOption(settings, "io/verbose", Verbose(threshold=-1), overwrite=FALSE)
> 
> # Save and reload settings
> path <- tempdir()
> str(list(path=path, file.info(path), file_test("-d", path)))
List of 3
 $ path: chr "D:\\temp\\RtmpGkqhNA"
 $     :'data.frame':	1 obs. of  7 variables:
  ..$ size : num 0
  ..$ isdir: logi TRUE
  ..$ mode : 'octmode' int 777
  ..$ mtime: POSIXct[1:1], format: "2023-11-17 08:48:05"
  ..$ ctime: POSIXct[1:1], format: "2023-11-17 08:48:05"
  ..$ atime: POSIXct[1:1], format: "2023-11-17 08:48:05"
  ..$ exe  : chr "no"
 $     : logi TRUE
> stopifnot(file_test("-d", path), isDirectory(path))
> 
> saveAnywhere(settings, path=path)
> settings2 <- Settings$loadAnywhere(basename, paths=path)
> print(isModified(settings2))
[1] FALSE
> 
> # Clean up
> file.remove(getLoadedPathname(settings2))
[1] TRUE
> 
> # Assert correctness
> stopifnot(equals(settings, settings2))
> 
> print(isModified(settings))
[1] FALSE
> 
> 
> 
> proc.time()
   user  system elapsed 
   0.31    0.10    0.40