tidyeval-across.md
In dtplyr: Data Table Back-End for 'dplyr'

across() does not support formulas with dots

Code
  (expect_error(capture_across(dt, across(a:b, ~ log(.x, base = .y), base = 2))))
Output
  <error/rlang_error>
  Error in `across_fun()`:
  ! `dtplyr::across()` does not support `...` when a purrr-style lambda is used in `.fns`.
  i Use a lambda instead.
  i Or inline them via a purrr-style lambda.
Code
  (expect_error(capture_across(dt, across(a:b, list(~ log(.x, base = .y)), base = 2)))
  )
Output
  <error/rlang_error>
  Error in `FUN()`:
  ! `dtplyr::across()` does not support `...` when a purrr-style lambda is used in `.fns`.
  i Use a lambda instead.
  i Or inline them via a purrr-style lambda.

across() gives informative errors

Code
  capture_across(dt, across(a, 1))
Condition
  Error in `across_funs()`:
  ! `.fns` argument to dtplyr::across() must be a NULL, a function, formula, or list
Code
  capture_across(dt, across(a, list(1)))
Condition
  Error in `FUN()`:
  ! .fns argument to dtplyr::across() must contain a function or a formula
  x Problem with 1

if_all() gives informative errors

Code
  capture_if_all(dt, if_all(a, 1))
Condition
  Error in `across_funs()`:
  ! `.fns` argument to dtplyr::across() must be a NULL, a function, formula, or list
Code
  capture_if_all(dt, if_all(a, list(1)))
Condition
  Error in `FUN()`:
  ! .fns argument to dtplyr::across() must contain a function or a formula
  x Problem with 1

if_all() cannot rename variables

Code
  (expect_error(capture_if_all(dt, if_all(c(a = x, b = y)))))
Output
  <error/tidyselect:::error_disallowed_rename>
  Error in `if_all()`:
  ! Can't rename variables in this context.