[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: proposing a simpler mechanism

This page is part of the web mail archives of SRFI 102 from before July 7th, 2015. The new archives for SRFI 102 contain all messages, not just those from before July 7th, 2015.


On 11/13/09, Thomas Bushnell BSG <tb@xxxxxxxxxx> wrote:
> I'll admit that, along with Kent Dybvig, I'm no fan of arity inspection,
>  for a jillion reasons.  I think it's ill-conceived.
>  But if it must happen, how about this:
>  (procedure-arity PROC) returns two values, first, the minimum number of
>  arguments, and second, whether additional arguments are permissible.
>  This exactly covers the possibilities for standard Scheme.  It is
>  trivial to implement given any of the common facilities out there.  It
>  is clear and simple and easy to specify.

     Unlike Dybvig's proposal, this allocates the multiple return
values in the heap in implementations that implement (values) as a
vector constructor.