furrr-options.md
In furrr: Apply Mapping Functions in Parallel using Futures

can use `stdout = NA` to not intercept at all

Code
  future_map(1:2, fn, .options = opts)
Output
  hello
  hello
  [[1]]
  [1] 1

  [[2]]
  [1] 2

Code
  future_map(1:2, fn, .options = opts)
Output
  [[1]]
  [1] 1

  [[2]]
  [1] 2

validates `stdout`

Code
  (expect_error(furrr_options(stdout = "x")))
Output
  <error/rlang_error>
  Error in `validate_stdout()`:
  ! `stdout` must be `TRUE`, `FALSE`, or `NA`.
Code
  (expect_error(furrr_options(stdout = c(TRUE, TRUE))))
Output
  <error/vctrs_error_assert_size>
  Error in `validate_stdout()`:
  ! `stdout` must have size 1, not size 2.

can avoid handling conditions altogether

Code
  future_map(1:5, fn, .options = opts)
Condition
  Warning in `...furrr_fn()`:
  hello
  Warning in `...furrr_fn()`:
  hello
  Warning in `...furrr_fn()`:
  hello
  Warning in `...furrr_fn()`:
  hello
  Warning in `...furrr_fn()`:
  hello
Output
  [[1]]
  [1] 1

  [[2]]
  [1] 2

  [[3]]
  [1] 3

  [[4]]
  [1] 4

  [[5]]
  [1] 5

Code
  future_map(1:5, fn, .options = opts)
Output
  [[1]]
  [1] 1

  [[2]]
  [1] 2

  [[3]]
  [1] 3

  [[4]]
  [1] 4

  [[5]]
  [1] 5

validates `conditions`

Code
  (expect_error(furrr_options(conditions = 1)))
Output
  <error/rlang_error>
  Error in `validate_conditions()`:
  ! `conditions` must be a character vector.