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% Generated by roxygen2: do not edit by hand
% Please edit documentation in R/expect-inheritance.R
\name{expect_is}
\alias{expect_is}
\title{Does an object inherit from a given class?}
\usage{
expect_is(object, class, info = NULL, label = NULL)
}
\arguments{
\item{object}{Object to test.
Supports limited unquoting to make it easier to generate readable failures
within a function or for loop. See \link{quasi_label} for more details.}
\item{class}{Either a character vector of class names, or
for \code{expect_s3_class()} and \code{expect_s4_class()}, an \code{NA} to assert
that \code{object} isn't an S3 or S4 object.}
}
\description{
\ifelse{html}{\href{https://lifecycle.r-lib.org/articles/stages.html#superseded}{\figure{lifecycle-superseded.svg}{options: alt='[Superseded]'}}}{\strong{[Superseded]}}
\code{expect_is()} is an older form that uses \code{\link[=inherits]{inherits()}} without checking
whether \code{x} is S3, S4, or neither. Instead, I'd recommend using
\code{\link[=expect_type]{expect_type()}}, \code{\link[=expect_s3_class]{expect_s3_class()}} or \code{\link[=expect_s4_class]{expect_s4_class()}} to more clearly
convey your intent.
}
\section{3rd edition}{
\ifelse{html}{\href{https://lifecycle.r-lib.org/articles/stages.html#deprecated}{\figure{lifecycle-deprecated.svg}{options: alt='[Deprecated]'}}}{\strong{[Deprecated]}}
\code{expect_is()} is formally deprecated in the 3rd edition.
}
\keyword{internal}
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