[Rd] Behaviour of exists(x) for length(x) > 1

[Hugh Parsonage]

It seems that exists accepts character vectors of lengths other than
one, but discards all but the first element without an error or
warning.  Is this intended?  The name "exists" is in the singular, so
it's not surprising that it only contemplates the length-one instance
but in the absence of an error or warning it may be an improvement to
mention what happens when length(x) > 1.

exists(as.character(substitute(doesntexist + absenttoo)))

Best,

Hugh