[Python-Dev] Re: ternary operators (fwd)
Ka-Ping Yee
ping@lfw.org
Mon, 31 Jan 2000 22:29:40 -0600 (EST)
On Mon, 31 Jan 2000 gvwilson@nevex.com wrote:
> So I asked Simon Peyton-Jones and Phil Wadler how languages other than C
> and its derivatives did conditional expressions; one of the replies was:
>
> On Mon, 31 Jan 2000, Philip Wadler wrote:
>
> > Tony Hoare had a nice ternary `if'. He writes
> >
> > if c then d else e
> >
> > as
> >
> > d <c> e
Wait -- how the heck is this supposed to parse if 'c' is an
arbitrary expression?
I think we've run out of bracket-like thingies. (Yes, that
would be the technical term).
It also looks pretty opaque -- even if you do intuit that
it's ternary-select (which i wouldn't if you hadn't told me)
it still isn't really obvious which side is which.
-- ?!ng