Check Classes

Checks that an object inherits from one or more classes.

check_classes(
  x,
  classes = character(0),
  exclusive = FALSE,
  order = FALSE,
  x_name = substitute(x),
  error = TRUE
)

Arguments

x

The object to check.

classes

A character vector of the classes x should inherit from.

exclusive

A flag indicating whether other classes are not permitted.

order

A flag indicating whether the object classes have to occur in the same order as classes.

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

The classes of an object can be returned using the class() function.

See also

check_inherits

Examples

check_classes(list())
#> Warning: `check_classes()` was deprecated in checkr 0.5.1.
#> Please use chk::chk_is(), chk::chk_s3_class(), chk::chk_s4_class(), or chk::check_values() instead.
check_classes(list(), "list")
#> Warning: `check_classes()` was deprecated in checkr 0.5.1.
#> Please use chk::chk_is(), chk::chk_s3_class(), chk::chk_s4_class(), or chk::check_values() instead.
check_classes(list(), "numeric", error = FALSE)
#> Warning: `check_classes()` was deprecated in checkr 0.5.1.
#> Please use chk::chk_is(), chk::chk_s3_class(), chk::chk_s4_class(), or chk::check_values() instead.
#> Warning: list() must inherit from class numeric