R Under development (unstable) (2024-03-06 r86056 ucrt) -- "Unsuffered Consequences"
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> source("incl/start.R")
> 
> ## WORKAROUND: Avoid problem reported in testthat Issue #229, which
> ## causes covr::package_coverage() to given an error. /HB 2015-02-16
> suppressWarnings({
+   rm(list = c("a", "b", "c", "x", "y", "z", "square",
+             "pathname", "url", "filename"))
+ })
> 
> 
> message("Setting up expressions")
Setting up expressions
> exprs <- list(
+   A = quote({
+     Sys.sleep(1)
+     x <- 0.1
+   }),
+   B = quote({ y <- 0.2 }),
+   C = quote({ z <- a + 0.3 }),
+   D = quote({ pathname <- file.path(dirname(url), filename) }),
+   E = quote({ b <- c }),
+   F = quote({
+     a <- { runif(1) }
+     b <- { rnorm(1) }
+     x <- a * b
+     abs(x)
+   }),
+   G = quote({
+     y <- square(a)
+   }),
+   H = quote({
+     b <- a
+     a <- 1
+   })
+ )
> 
> atleast <- list(
+   A = c(),
+   B = c(),
+   C = c("a"),
+   D = c("filename"),
+   E = c("c"),
+   F = c(),
+   G = c("a", "square"),
+   H = c() ## FIXME: Should be c("a"), cf. Issue #5.
+ )
> 
> not <- list(
+   A = c("x"),
+   B = c("y"),
+   C = c("z"),
+   D = c("pathname"),
+   E = c("b"),
+   F = c("a", "b", "x"),
+   G = c(),
+   H = c()
+ )
> 
> 
> ## Define globals
> a <- 3.14
> c <- 2.71
> square <- function(x) x ^ 2
> filename <- "index.html"
> # Yes, pretend we forget 'url'
> 
> message("Find globals")
Find globals
> for (kk in seq_along(exprs)) {
+   key <- names(exprs)[kk]
+   expr <- exprs[[key]]
+   cat(sprintf("Expression #%d ('%s'):\n", kk, key))
+   print(expr)
+ 
+   names <- findGlobals(expr, method = "conservative")
+   cat(sprintf("Globals: %s\n", paste(sQuote(names), collapse = ", ")))
+   stopifnot(all(atleast[[key]] %in% names))
+   stopifnot(!any(names %in% not[[key]]))
+ 
+   globals <- globalsOf(expr, method = "conservative")
+   cat(sprintf("Globals: %s\n", paste(sQuote(names(globals)), collapse = ", ")))
+   stopifnot(all(atleast[[key]] %in% names(globals)))
+   stopifnot(!any(names(globals) %in% not[[key]]))
+   str(globals)
+ 
+   cat("\n")
+ }
Expression #1 ('A'):
{
    Sys.sleep(1)
    x <- 0.1
}
Globals: '{', 'Sys.sleep', '<-'
Globals: '{', 'Sys.sleep', '<-'
List of 3
 $ {        :.Primitive("{") 
 $ Sys.sleep:function (time)  
 $ <-       :.Primitive("<-") 
 - attr(*, "where")=List of 3
  ..$ {        :<environment: base> 
  ..$ Sys.sleep:<environment: base> 
  ..$ <-       :<environment: base> 
 - attr(*, "class")= chr [1:2] "Globals" "list"

Expression #2 ('B'):
{
    y <- 0.2
}
Globals: '{', '<-'
Globals: '{', '<-'
List of 2
 $ { :.Primitive("{") 
 $ <-:.Primitive("<-") 
 - attr(*, "where")=List of 2
  ..$ { :<environment: base> 
  ..$ <-:<environment: base> 
 - attr(*, "class")= chr [1:2] "Globals" "list"

Expression #3 ('C'):
{
    z <- a + 0.3
}
Globals: '{', '<-', '+', 'a'
Globals: '{', '<-', '+', 'a'
List of 4
 $ { :.Primitive("{") 
 $ <-:.Primitive("<-") 
 $ + :function (e1, e2)  
 $ a : num 3.14
 - attr(*, "where")=List of 4
  ..$ { :<environment: base> 
  ..$ <-:<environment: base> 
  ..$ + :<environment: base> 
  ..$ a :<environment: R_GlobalEnv> 
 - attr(*, "class")= chr [1:2] "Globals" "list"

Expression #4 ('D'):
{
    pathname <- file.path(dirname(url), filename)
}
Globals: '{', '<-', 'file.path', 'dirname', 'url', 'filename'
Globals: '{', '<-', 'file.path', 'dirname', 'url', 'filename'
List of 6
 $ {        :.Primitive("{") 
 $ <-       :.Primitive("<-") 
 $ file.path:function (..., fsep = .Platform$file.sep)  
 $ dirname  :function (path)  
 $ url      :function (description, open = "", blocking = TRUE, encoding = getOption("encoding"), 
    method = getOption("url.method", "default"), headers = NULL)  
 $ filename : chr "index.html"
 - attr(*, "where")=List of 6
  ..$ {        :<environment: base> 
  ..$ <-       :<environment: base> 
  ..$ file.path:<environment: base> 
  ..$ dirname  :<environment: base> 
  ..$ url      :<environment: base> 
  ..$ filename :<environment: R_GlobalEnv> 
 - attr(*, "class")= chr [1:2] "Globals" "list"

Expression #5 ('E'):
{
    b <- c
}
Globals: '{', '<-', 'c'
Globals: '{', '<-', 'c'
List of 3
 $ { :.Primitive("{") 
 $ <-:.Primitive("<-") 
 $ c : num 2.71
 - attr(*, "where")=List of 3
  ..$ { :<environment: base> 
  ..$ <-:<environment: base> 
  ..$ c :<environment: R_GlobalEnv> 
 - attr(*, "class")= chr [1:2] "Globals" "list"

Expression #6 ('F'):
{
    a <- {
        runif(1)
    }
    b <- {
        rnorm(1)
    }
    x <- a * b
    abs(x)
}
Globals: '{', '<-', 'runif', 'rnorm', '*', 'abs'
Globals: '{', '<-', 'runif', 'rnorm', '*', 'abs'
List of 6
 $ {    :.Primitive("{") 
 $ <-   :.Primitive("<-") 
 $ runif:function (n, min = 0, max = 1)  
 $ rnorm:function (n, mean = 0, sd = 1)  
 $ *    :function (e1, e2)  
 $ abs  :function (x)  
 - attr(*, "where")=List of 6
  ..$ {    :<environment: base> 
  ..$ <-   :<environment: base> 
  ..$ runif:<environment: package:stats> 
  .. ..- attr(*, "name")= chr "package:stats"
  .. ..- attr(*, "path")= chr "D:/RCompile/recent/R/library/stats"
  ..$ rnorm:<environment: package:stats> 
  .. ..- attr(*, "name")= chr "package:stats"
  .. ..- attr(*, "path")= chr "D:/RCompile/recent/R/library/stats"
  ..$ *    :<environment: base> 
  ..$ abs  :<environment: base> 
 - attr(*, "class")= chr [1:2] "Globals" "list"

Expression #7 ('G'):
{
    y <- square(a)
}
Globals: '{', '<-', 'square', 'a'
Globals: '{', '<-', 'square', 'a', '^'
List of 5
 $ {     :.Primitive("{") 
 $ <-    :.Primitive("<-") 
 $ square:function (x)  
 $ a     : num 3.14
 $ ^     :function (e1, e2)  
 - attr(*, "where")=List of 5
  ..$ {     :<environment: base> 
  ..$ <-    :<environment: base> 
  ..$ square:<environment: R_GlobalEnv> 
  ..$ a     :<environment: R_GlobalEnv> 
  ..$ ^     :<environment: base> 
 - attr(*, "class")= chr [1:2] "Globals" "list"

Expression #8 ('H'):
{
    b <- a
    a <- 1
}
Globals: '{', '<-'
Globals: '{', '<-'
List of 2
 $ { :.Primitive("{") 
 $ <-:.Primitive("<-") 
 - attr(*, "where")=List of 2
  ..$ { :<environment: base> 
  ..$ <-:<environment: base> 
 - attr(*, "class")= chr [1:2] "Globals" "list"

> 
> names <- findGlobals(exprs, method = "conservative", unlist = TRUE)
> cat(sprintf("Globals: %s\n", paste(sQuote(names), collapse = ", ")))
Globals: '{', 'Sys.sleep', '<-', '+', 'a', 'file.path', 'dirname', 'url', 'filename', 'c', 'runif', 'rnorm', '*', 'abs', 'square'
> 
> ## Cleanup
> source("incl/end.R")
> 
> proc.time()
   user  system elapsed 
   0.26    0.03    0.28