check_class: Check Argument's Class
In cloudfs: Streamlined Interface to Interact with Cloud Storage Platforms

check_class

R Documentation

Check Argument's Class

Check if argument is of proper class.

check_class(x, arg_class, alt_null = FALSE, add_msg = NULL)

`x`	Function argument that is being asserted.
`arg_class`	Class name. Usually "character", "numeric", "data.frame", etc.
`alt_null`	Logical. Should argument accept NULL value.
`add_msg`	Is an additional message that can be printed over the standard function error message. You can: pass the names of the arguments that failed the test by using `{x_names}` in the message body (e.g. "What are the {x_names}"); pass the tested class by using `{arg_class}` in the message body (e.g. "I want them to be {arg_class})" pass the classes of the arguments that failed the test by using `{wrong_class}` in the message body (e.g. "{wrong_class} is wrong")