PEP 308: Yet another syntax proposal.

[Piet van Oostrum]

>>>>> marktrussell at btopenworld.com (Mark Russell) (MR) wrote:

MR> So how about an alternative: add a special method to the (python 2.3)
MR> bool type that works like this:

MR>     cond = x > 10    # or any expression that yields a bool
MR>     result = cond.choose(iftrue, iffalse)

MR> choose() would need to be a special method so that it can avoid
MR> evaluating the non-chosen branch.

So what about:
fun = cond.choose
...later...
result = fun(iftrue, iffalse)

every function call would have to check if its arguments should be lazily
evaluated.
Maybe introducing `special forms' as in Lisp would be nice.
-- 
Piet van Oostrum <piet at cs.uu.nl>
URL: http://www.cs.uu.nl/~piet [PGP]
Private email: P.van.Oostrum at hccnet.nl