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These functions provide the base mechanisms for defining
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These functions provide the base mechanisms for defining
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new functions in the \R language.
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new functions in the \R language.
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}
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}
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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, or a series of expressions separated
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    \item{value}{An expression, or a series of non-empty expressions separated
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        by commas.}
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        by commas.}
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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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    In \R (unlike S) the names in an argument list cannot be quoted
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    non-standard names.
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    non-standard names.
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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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    If \code{value} is a series of expressions, the value returned is a
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    If \code{value} is a series of non-empty expressions, the value
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    list of the evaluated expressions, with names set to the expressions
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    returned is a list of the evaluated expressions, with names set to
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    where these are the names of \R objects.
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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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    the result of evaluating \code{foo()}.
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}
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}
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\seealso{
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\seealso{
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  \code{\link{args}} and \code{\link{body}} for accessing the arguments
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  \code{\link{args}} and \code{\link{body}} for accessing the arguments
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  and body of a function.
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  and body of a function.
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