On Nov 06 2017, Ken Raeburn <raeburn@permabit.com> wrote:On Nov 6, 2017, at 09:40, Drew Adams <drew.adams@oracle.com> wrote:We should perhaps put something about throwing error on '&option &rest'
into NEWS though.
I don't understand. In Common Lisp it is perfectly correct
to use both &optional and &rest.
What's rejected is (&optional &rest other-vars), whereas (&optional
var1 &rest other-vars) is okay. Does CL accept the first form (and if
yes, what does it mean)? I couldn't tell from the page you linked to.
CL accepts a single variable after &rest. And there must be
a variable after &optional. (&optional foo &rest bar) is OK.
(&optional &rest foo) is not OK.
(&optional foo &rest bar toto titi) is not OK.
Is this CL in general or a particular CL implementation? The web page you sent the URL for earlier reads like a specification, and from its use of “*” looks to me like it allows the (admittedly useless) form of &optional with no variables.
clisp accepts it.