deparse and substitute under RStudio console

[dusadrian]

Hi all,

I am experiencing different results between RStudio and plain R, using deparse(substitute()), with the following reprex:

foo <- function(x) {
    return(deparse(substitute(x)))
}

foo(1 - x)
#> [1] "`-`(1, x)"

The result should be "1 - x", which I get from plain R.
Interestingly, package reprex also gave the correct result, but this is not the case when used in the RStudio console.

[nirgrahamuk]

what do you consider to be plain R ? Rgui64 ? Rterm ?
I tried to reproduce your result. I'm using
R version 3.6.3 (2020-02-29)
Platform: x86_64-w64-mingw32/x64 (64-bit)
Running under: Windows 10 x64 (build 19043)
with RStudio 1.3.1
and running your code example in the console of that gives me your desired result "1 - x" and not "-(1,x)"

[dusadrian]

Oh, I should have probably specified more details.
Plain R is both Rgui and Rterm, I get correct results in both the usual Rgui console and under a Terminal.

But the Operating System is MacOS Monterey version 12.0.1, with:

> R.version
               _                           
platform       x86_64-apple-darwin17.0     
arch           x86_64                      
os             darwin17.0                  
system         x86_64, darwin17.0          
status                                     
major          4                           
minor          1.1                         
year           2021                        
month          08                          
day            10                          
svn rev        80725                       
language       R                           
version.string R version 4.1.1 (2021-08-10)
nickname       Kick Things 

The version of RStudio I'm using is: Version 1.4.1717
EDIT: I've just upgraded RStudio to version 2021.09.1 Build 372, still the same issue.