Assert that an object is a list.

Usage

assertList(
  x,
  length = NULL,
  na = FALSE,
  null = FALSE,
  empty = TRUE,
  unique = FALSE,
  named = FALSE,
  class = NULL,
  nm = deparse1(substitute(x), backtick = TRUE),
  call = parent.frame(),
  msg = NULL
)

Arguments

x: Variable to check.
length: Required length. If NULL length is not checked.
na: Whether it can contain NA values.
null: Whether it can be NULL.
empty: Whether it can be empty.
unique: Whether it has to contain unique elements.
named: Whether it has to be named.
class: Class that the elements must have.
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.