Check ... Unused — chk_unused • chk

Checks if ... is unused

length(list(...)) == 0L

Usage

chk_unused(...)

vld_unused(...)

Arguments

...: Additional arguments.

Value

The chk_ function throws an informative error if the test fails.

Functions

vld_unused(): Validate ... Unused

See also

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

Other ellipsis_checkers: chk_used()

Examples

# chk_unused
fun <- function(x, ...) {
  chk_unused(...)
  x
}
fun(1)
#> [1] 1
try(fun(1, 2))
#> Error in fun(1, 2) : `...` must be unused.
# vld_unused
fun <- function(x, ...) {
  vld_unused(...)
}
fun(1)
#> [1] TRUE
try(fun(1, 2))
#> [1] FALSE