chk_missing: Check Missing Argument

In chk: Check User-Supplied Function Arguments

Check Missing Argument

Description

Checks argument missing using

missing(x)

Usage

chk_missing(x, x_name = NULL)

vld_missing(x)

Arguments

x	The object to check.
x_name	A string of the name of object x or NULL.

Details

Currently only checks if value is available (as opposed to whether it was specified).

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.

Functions

• vld_missing(): Validate Missing Argument

See Also

missing()

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

Other missing_checkers: chk_function(), chk_not_missing()

Examples

# chk_missing
fun <- function(x) {
  chk_missing(x)
}
fun()
try(fun(1))
# vld_missing
fun <- function(x) {
  vld_missing(x)
}
fun()
fun(1)

chk documentation built on April 3, 2025, 8:50 p.m.