Nothing
Code
fct(1:3)
Condition
Error in `fct()`:
! `x` must be a character vector, not an integer vector.
Code
fct("x", 1:3)
Condition
Error in `fct()`:
! `levels` must be a character vector or `NULL`, not an integer vector.
Code
fct("x", "y", na = 1)
Condition
Error in `fct()`:
! `na` must be a character vector, not the number 1.
Code
fct(c("x", "y", "z"), c("x", "y"))
Condition
Error in `fct()`:
! All values of `x` must appear in `levels` or `na`
i Missing level: "z"
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