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\arguments{
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\arguments{
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    \item{arglist}{Empty or one or more name or name=expression terms.}
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    \item{arglist}{Empty or one or more name or name=expression terms.}
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    \item{value}{An expression.}
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    \item{value}{An expression.}
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}
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}
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\details{
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\details{
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  In \R (unlike S) the names in an argument list cannot be quoted
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  The names in an argument list can be back-quoted non-standard names
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  non-standard names.
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  (see \sQuote{\link{backquote}}).
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  If \code{value} is missing, \code{NULL} is returned.  If it is a
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  If \code{value} is missing, \code{NULL} is returned.  If it is a
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  single expression, the value of the evaluated expression is returned.
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  single expression, the value of the evaluated expression is returned.
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  If the end of a function is reached without calling \code{return}, the
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  If the end of a function is reached without calling \code{return}, the
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\section{Warning}{
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\section{Warning}{
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  Prior to \R 1.8.0, \code{value} could be a series of non-empty
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  Prior to \R 1.8.0, \code{value} could be a series of non-empty
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  expressions separated by commas.  In that case the value
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  expressions separated by commas.  In that case the value
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  returned is a list of the evaluated expressions, with names set to
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  returned is a list of the evaluated expressions, with names set to
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  the expressions where these are the names of \R objects. That is,
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  the expressions where these are the names of \R objects. That is,
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  \code{a=foo()} names the list component \code{a} and gives it value
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  \code{a=foo()} names the list component \code{a} and gives it the value
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  the result of evaluating \code{foo()}.
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  which results from evaluating \code{foo()}.
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  This has been deprecated (and a warning is given), as it was never
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  This has been deprecated (and a warning is given), as it was never
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  documented in S, and whether or not the list is named differs by S versions.
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  documented in S, and whether or not the list is named differs by S versions.
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}
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}
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\seealso{
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\seealso{