list-of-transpose.md
In vctrs: Vector Helpers

`x` is validated

Code
  list_of_transpose(1)
Condition
  Error in `list_of_transpose()`:
  ! `1` must be a `<list_of>`, not the number 1.

Code
  list_of_transpose(1, x_arg = "x", error_call = quote(foo()))
Condition
  Error in `foo()`:
  ! `x` must be a `<list_of>`, not the number 1.

`x` must be a fully specified list of

Code
  x <- list_of(.ptype = integer(), .size = zap())
  list_of_transpose(x)
Condition
  Error in `list_of_transpose()`:
  ! `x` must be a fully specified `<list_of>`.
  i `size` is not specified.

Code
  x <- list_of(.ptype = zap(), .size = 1)
  list_of_transpose(x)
Condition
  Error in `list_of_transpose()`:
  ! `x` must be a fully specified `<list_of>`.
  i `ptype` is not specified.

`...` must be empty

Code
  list_of_transpose(list_of2(1), 2)
Condition
  Error in `list_of_transpose()`:
  ! `...` must be empty.
  x Problematic argument:
  * ..1 = 2
  i Did you forget to name an argument?

doesn't allow `NULL` elements

Code
  list_of_transpose(list_of2(1:4, NULL, 5:8))
Condition
  Error in `list_of_transpose()`:
  ! `list_of2(1:4, NULL, 5:8)` can't contain `NULL` values.