Last chance! 50% off unlimited learning
Sale ends in
This is equivalent to base::match.arg()
with a few differences:
Partial matches trigger an error.
Error messages are a bit more informative and obey the tidyverse standards.
arg_match(arg, values = NULL)
A symbol referring to an argument accepting strings.
The possible values that arg
can take. If NULL
,
the values are taken from the function definition of the caller
frame.
The string supplied to arg
.
# NOT RUN {
fn <- function(x = c("foo", "bar")) arg_match(x)
fn("bar")
# This would throw an informative error if run:
# fn("b")
# fn("baz")
# }
Run the code above in your browser using DataLab