Nothing
Code
. <- regex(x)
Condition
Warning in `regex()`:
Coercing `pattern` to a plain character vector.
Code
. <- coll(x)
Condition
Warning in `coll()`:
Coercing `pattern` to a plain character vector.
Code
. <- fixed(x)
Condition
Warning in `fixed()`:
Coercing `pattern` to a plain character vector.
Code
type(1:3)
Condition
Error:
! `pattern` must be a string, not an integer vector.
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