[Python-Dev] Extended Function syntax

[M.-A. Lemburg]

Guido van Rossum wrote:
>>>>In particular:
>>>>
>>>>   def name(arg, ...) [expr1, expr2, expr3]:
>>>>       ...body...
>>>>
>>>>would be equivalent to (some variation on):
>>>>
>>>>   def name(arg, ...):
>>>>     ...body...
>>>>
>>>>   name=expr1(expr2(expr3(name)))
>>>
>>>With Michael's patch (which indeed still works) it's actually 
>>>
>>>    name = expr3(expr2(expr1(name)))
>>
>>I can't remember if that was deliberate or accidental.  I think
>>deliberate.
> 
> 
> It certainly surprises me less -- this is left-to-right (applying
> expr1 first) which is goodness.

+1

I suppose the following would also be possible, provided
that types(...) returns a callable, right ?

def myfunc(x,y,z) [types(int, int, float), cacheglobals]:
     return math.sin(x*y/z)

.... and cacheglobals would be able to rewrite the byte
code too. Nice :-)

-- 
Marc-Andre Lemburg
CEO eGenix.com Software GmbH
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