[IronPython] .NET attributes

Dino Viehland dinov at exchange.microsoft.com
Fri Sep 15 16:52:33 CEST 2006

Unfortunately, CPython only allows the decorator syntax before a function declaration...  You could always manually call the decorator function w/ the class object and see what you get back though.

Charlie's earlier point about all the different targets is a really good one though - worse than even properties are things like arguments, return types, etc...  that won't fit in at all w/ decorators.  You could imagine allowing the syntax anywhere, but there'd be no way to disambiguate between a return decorator and a function decorator in Python.

-----Original Message-----
From: users-bounces at lists.ironpython.com [mailto:users-bounces at lists.ironpython.com] On Behalf Of Charlie Moad
Sent: Friday, September 15, 2006 7:46 AM
To: Discussion of IronPython
Subject: Re: [IronPython] .NET attributes

On 9/15/06, Michael Foord <fuzzyman at voidspace.org.uk> wrote:
> Charlie Moad wrote:
> >> Take away decorator support and you'll lose at least this Python
> >> programmer...
> >> Decorators and attributes have at least some commonality, which is
> >> why this syntax ended up in Python in the first place...
> >> Allowing decorator syntax in places CPython doesn't is better than
> >> not allowing it where it does...
> >>
> >
> > So it sounds like people want decorator syntax for attributes.
> > Would it be sufficient to check for inheritance from
> > System.Attribute to distinguish the two?
> Sounds very good.
> > Also attributes being classes and decorators functions might help.

> Can't CPython decorators also be classes (I haven't tried this) ?

Callable classes I suppose....
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