R Under development (unstable) (2024-05-17 r86565 ucrt) -- "Unsuffered Consequences"
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> source(file.path("_helper", "init.R"))
> 
> # - "Rename Works" -------------------------------------------------------------
> 
> x <- readRDS("_helper/unitizers/trivial.unitizer/data.rds")
> x.edit <- editCalls(x, quote(x), quote(y), interactive.only = FALSE)
Warning in .local(x, lang.old, lang.new, ...) :
  This is an experimental function; make sure you backup any unitizers before you edit them
> x.edit@items.ref.calls.deparse
[1] "TRUE"       "y <- 1 + 1" "y + 2"      "y <- y"     "y * y"     
[6] "y/y + 2"   
> !identical(x@items.ref.calls.deparse, x.edit@items.ref.calls.deparse)
[1] TRUE
> identical(
+   x.edit@items.ref.calls.deparse,
+   gsub("\\bx\\b", "y", x@items.ref.calls.deparse)
+ )
[1] TRUE
> 
> # warn
> unitizer:::read_line_set_vals("Y")
> x.edit2 <- editCalls(x, quote(x), quote(y), interactive.mode = TRUE)
Warning in .local(x, lang.old, lang.new, ...) :
  This is an experimental function; make sure you backup any unitizers before you edit them
| Do you wish to proceed ([Y]es/[N]o)? 

unitizer> Y
> # message
> unitizer:::read_line_set_vals("N")
> x.edit3 <- editCalls(x, quote(x), quote(y), interactive.mode = TRUE)
Warning in .local(x, lang.old, lang.new, ...) :
  This is an experimental function; make sure you backup any unitizers before you edit them
| Do you wish to proceed ([Y]es/[N]o)? 

unitizer> N
Exiting without edits
> identical(x.edit3, x)
[1] TRUE
> 
> unitizer:::read_line_set_vals(NULL)
> x.edit@items.ref.calls.deparse
[1] "TRUE"       "y <- 1 + 1" "y + 2"      "y <- y"     "y * y"     
[6] "y/y + 2"   
> 
> proc.time()
   user  system elapsed 
   0.43    0.06    0.48