Should vars_rename() accept index numbers?

[yutannihilation]

I feel this behavior a bit inconsistent, as select() and rename() shares the same semantics to some extent.

vars_select(names(mtcars), new = 1)
#>   new 
#> "mpg" 
vars_rename(names(mtcars), new = 1)
#> Error: `new` = 1 must be a symbol or a string, not a double vector

For example, they both accept characters. Are there any reason to prevent rename from accepting numbers? (This is not a big problem for me, though. This issue is mostly for my curiosity).

vars_rename(names(mtcars), new = "cyl")
#>    mpg    new   disp     hp   drat     wt   qsec     vs     am   gear   carb 
#>  "mpg"  "cyl" "disp"   "hp" "drat"   "wt" "qsec"   "vs"   "am" "gear" "carb" 
vars_select(names(mtcars), new = "cyl")
#>   new 
#>  "cyl"

[yutannihilation]

Thanks!