chk (version 0.10.0)

chk_s4_class: Check Inherits from S4 Class

Description

Checks inherits from S4 class using

isS4(x) && methods::is(x, class)

Usage

chk_s4_class(x, class, x_name = NULL)
vld_s4_class(x, class)

Value

The chk_ function throws an informative error if the test fails or returns the original object if successful so it can used in pipes.

The vld_ function returns a flag indicating whether the test was met.

Arguments

x

The object to check.

class

A string specifying the class.

x_name

A string of the name of object x or NULL.

Functions

• vld_s4_class(): Validate Inherits from S4 Class

See Also

methods::is()

For more details about the use of this function, please read the article vignette("chk-families").

Other id_checkers: chk_data(), chk_is(), chk_s3_class()

Examples

# chk_s4_class
try(chk_s4_class(1, "numeric"))
chk_s4_class(getClass("MethodDefinition"), "classRepresentation")
# vld_s4_class
vld_s4_class(numeric(0), "numeric")
vld_s4_class(getClass("MethodDefinition"), "classRepresentation")