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\name{has_args}
\alias{\%has_args\%}
\alias{has_args}
\title{Check a function has specified arguments}
\usage{
has_args(f, args, exact = FALSE)
f \%has_args\% args
}
\arguments{
\item{f}{a function}
\item{args}{a character vector of argument names}
\item{exact}{if \code{TRUE}, argument names must match
\code{args} exactly (order and value); otherwise \code{f}
just must have at least \code{args} in any order}
}
\description{
Check a function has specified arguments
}
\examples{
has_args(mean, "x")
has_args(mean, "x", exact = TRUE)
see_if(mean \%has_args\% "x")
see_if(mean \%has_args\% "y")
}
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