Check if a format is supported

Usage

is_valid_format(x, stop_otherwise = FALSE)

Arguments

x

either format string or an object returned by sprintf_format

stop_otherwise

logical, if x is not a format should an error be thrown

Value

TRUE if x is NULL, a supported format string, or a function; FALSE otherwise.

Note

No check if the function is actually a formatter is performed.

Examples

is_valid_format("xx.x")
#> [1] TRUE
is_valid_format("fakeyfake")
#> [1] FALSE