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  \item{x}{object to be coerced or tested.}
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  \item{x}{object to be coerced or tested.}
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}
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}
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\details{
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\details{
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  Names are limited to 10,000 bytes (and were to 256 bytes in versions
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  Names are limited to 10,000 bytes (and were to 256 bytes in versions
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  of \R before 2.13.0).
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  of \R before 2.13.0).
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  \code{as.name} first coerces its argument internally to a character
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  \code{as.name} first coerces its argument internally to a character
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  vector (so methods for \code{as.character} are not used).  It then
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  vector (so methods for \code{as.character} are not used).  It then
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  takes the first element and provided it is not \code{""}, returns a
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  takes the first element and provided it is not \code{""}, returns a
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  symbol of that name (and if the element is \code{NA_character_}, the
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  symbol of that name (and if the element is \code{NA_character_}, the
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  name is \code{`NA`}).
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  name is \code{`NA`}).
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  \code{as.name} is implemented as \code{\link{as.vector}(x, "symbol")},
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  \code{as.name} is implemented as \code{\link{as.vector}(x, "symbol")},
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  and hence will dispatch methods for the generic function \code{as.vector}.
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  and hence will dispatch methods for the generic function \code{as.vector}.
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  \code{is.name} and \code{is.symbol} are \link{primitive} functions.
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  \code{is.name} and \code{is.symbol} are \link{primitive} functions.
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}
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}
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\value{
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\value{
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  For \code{as.name} and \code{as.symbol}, an \R object of type
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  For \code{as.name} and \code{as.symbol}, an \R object of type
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  \code{"symbol"} (see \code{\link{typeof}}).
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  \code{"symbol"} (see \code{\link{typeof}}).