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Passing .options causes eager evaluation of all arguments in foreach() #41

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mikmart opened this issue May 19, 2023 · 0 comments · May be fixed by #42

mikmart commented May 19, 2023

Passing any .options causes all arguments to foreach() to be evaluated eagerly in a context where that may not be appropriate:

library(foreach)

foreach(i = 1:3) %:% foreach(j = i:3, .options.foo = "bar") %do% seq(i, j) |> str()
#> Error in eval(expr, envir, enclos): object 'i' not found

# Expected result
foreach(i = 1:3) %:% foreach(j = i:3) %do% seq(i, j) |> str()
#> List of 3
#>  $ :List of 3
#>   ..$ : int 1
#>   ..$ : int [1:2] 1 2
#>   ..$ : int [1:3] 1 2 3
#>  $ :List of 2
#>   ..$ : int 2
#>   ..$ : int [1:2] 2 3
#>  $ :List of 1
#>   ..$ : int 3

Discovered via this StackOverflow question: https://stackoverflow.com/q/76291120/4550695

The text was updated successfully, but these errors were encountered:

mikmart linked a pull request

that will close this issue

Don't evaluate ... eagerly when .options are passed #42

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