Check a function has specified arguments
has_args(f, args, exact = FALSE)
f %has_args% args
Arguments
- 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
Examples
has_args(mean, "x")
#> [1] TRUE
has_args(mean, "x", exact = TRUE)
#> [1] FALSE
see_if(mean %has_args% "x")
#> [1] TRUE
see_if(mean %has_args% "y")
#> [1] FALSE
#> attr(,"msg")
#> [1] "`%has_args%`(f = mean, args = \"y\") is not TRUE"