Checks if x is a flag or NA (missing logical scalar).
Usage
check_flag_na(x, coerce = TRUE, x_name = substitute(x), error = TRUE)
Arguments
- x
The object to check.
- coerce
A flag indicating whether to drop attributes including names.
- x_name
A string of the name of the object x.
- error
A flag indicating whether to throw an informative error or
immediately generate an informative message if the check fails.
Value
An invisible copy of x (if it doesn't throw an error).
Details
Useful when using flag to pass one of three options.