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% File src/library/utils/man/isS3stdGeneric.Rd
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% File src/library/utils/man/isS3stdGeneric.Rd
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% Part of the R package, https://www.R-project.org
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% Part of the R package, https://www.R-project.org
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% Copyright 1995-2016 R Core Team
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% Copyright 1995-2020 R Core Team
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% Distributed under GPL 2 or later
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% Distributed under GPL 2 or later
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\name{isS3stdGeneric}
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\name{isS3stdGeneric}
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\alias{isS3stdGeneric}
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\alias{isS3stdGeneric}
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\title{Check if a Function Acts as an S3 Generic}
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\title{Check if a Function Acts as an S3 Generic}
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}
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}
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\usage{
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\usage{
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isS3stdGeneric(f)
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isS3stdGeneric(f)
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}
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}
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\arguments{
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\arguments{
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  \item{f}{A function object}
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  \item{f}{a function object}
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}
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}
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\details{
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\details{
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  A closure is considered a standard S3 generic if the first expression
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  A closure is considered a standard S3 generic if the first expression
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  in its body calls \code{\link{UseMethod}}. Functions which perform
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  in its body calls \code{\link{UseMethod}}. Functions which perform
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  operations before calling \code{UseMethod} will not be considered
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  operations before calling \code{UseMethod} will not be considered
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  \dQuote{standard} S3 generics.
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  \dQuote{standard} S3 generics.
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  If \code{f} is currently being traced, i.e., inheriting from class
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  \code{"traceable"}, the definition of the original untraced version of
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  the function is used instead.
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}
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}
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\value{
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\value{
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  If \code{f} is an S3 generic, a logical vector containing \code{TRUE}
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  If \code{f} is an S3 generic, a logical containing \code{TRUE}
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  with the name of the S3 generic (the string passed to
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  with the name of the S3 generic (the string passed to
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  \code{UseMethod}). Otherwise, \code{FALSE} (unnamed).
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  \code{UseMethod}). Otherwise, \code{FALSE} (unnamed).
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}
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}
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\keyword{utilities}
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\keyword{utilities}