has_args: Check a function has specified arguments
In hadley/assertthat: Easy Pre and Post Assertions

Check a function has specified arguments

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has_args(f, args, exact = FALSE)

f %has_args% args

`f`	a function
`args`	a character vector of argument names
`exact`	if `TRUE`, argument names must match `args` exactly (order and value); otherwise `f` just must have at least `args` in any order

has_args(mean, "x")
has_args(mean, "x", exact = TRUE)

see_if(mean %has_args% "x")
see_if(mean %has_args% "y")

hadley/assertthat documentation built on June 5, 2019, 2:02 p.m.

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