Assert that an object has a certain class.

Usage

assertClass(
  x,
  class,
  length = NULL,
  null = FALSE,
  empty = TRUE,
  all = FALSE,
  extra = TRUE,
  nm = deparse1(substitute(x), backtick = TRUE),
  call = parent.frame(),
  msg = NULL
)

Arguments

x: To check.
class: Expected class or classes.
length: Required length. If NULL length is not checked.
null: Whether it can be NULL.
empty: Whether it can be empty.
all: Whether it should have all the classes or only at least one of them.
extra: Whether the object can have extra classes.
nm: Name to use in error messages. Defaults to the expression supplied to x.
call: Call argument that will be passed to cli.
msg: Custom error message.