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Checks if is ... used using
length(list(...)) != 0L
chk_used(...)vld_used(...)
vld_used(...)
The chk_ function throws an informative error if the test fails.
chk_
Additional arguments.
vld_used(): Validate ... Used
vld_used()
Other chk_ellipsis: chk_unused()
chk_unused()
# chk_used fun <- function(x, ...) { chk_used(...) x } try(fun(1)) fun(1, 2) # vld_used fun <- function(x, ...) { vld_used(...) } fun(1) fun(1, 2)
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