Encoding argument fails with simplifyVector = TRUE

[MansMeg]

Hi!

I get the following errors when using simplifyVector. I assume this is not a behavior we would expect/is intended?

> writeLines(text = jsonlite::toJSON("Måns"), con = "test.txt")
> jsonlite::read_json("test.txt", encoding = "UTF-8", simplifyVector = FALSE)
[[1]]
[1] "Måns"

> jsonlite::read_json("test.txt", encoding = "UTF-8", simplifyVector = TRUE)
Error in simplify(obj, simplifyVector = simplifyVector, simplifyDataFrame = simplifyDataFrame,  : 
  unused argument (encoding = "UTF-8")
> jsonlite::fromJSON("test.txt", encoding = "UTF-8", simplifyVector = FALSE)
[[1]]
[1] "Måns"

> jsonlite::fromJSON("test.txt", encoding = "UTF-8", simplifyVector = TRUE)
Error in simplify(obj, simplifyVector = simplifyVector, simplifyDataFrame = simplifyDataFrame,  : 
  unused argument (encoding = "UTF-8")


> sessionInfo()
R version 4.0.2 (2020-06-22)
Platform: x86_64-apple-darwin17.0 (64-bit)
Running under: macOS Catalina 10.15.7

Matrix products: default
BLAS:   /System/Library/Frameworks/Accelerate.framework/Versions/A/Frameworks/vecLib.framework/Versions/A/libBLAS.dylib
LAPACK: /Library/Frameworks/R.framework/Versions/4.0/Resources/lib/libRlapack.dylib

locale:
[1] sv_SE.UTF-8/sv_SE.UTF-8/sv_SE.UTF-8/C/sv_SE.UTF-8/sv_SE.UTF-8

attached base packages:
[1] stats     graphics  grDevices utils     datasets  methods   base     

loaded via a namespace (and not attached):
 [1] compiler_4.0.2   assertthat_0.2.1 cli_2.0.2        tools_4.0.2     
 [5] glue_1.4.2       rstudioapi_0.11  yaml_2.2.1       crayon_1.3.4    
 [9] fansi_0.4.1      jsonlite_1.7.1   rlang_0.4.7 

[jeroen]

There is no encoding parameter in read_json(), where did you get this? JSON is always utf-8 by definition.

[MansMeg]

The problem was that I have JSON without UTF8 (dont ask me why). I tried using the encoding argument, default in readLines(), through ... in read_json() and got this inconsistent behaviour.

I solved it in two steps now, but wanted to give you a heads up about that ... is affected by simplifyVector. Im not sure if that is intentional.