[Python-3000] typeclasses, duck-typing

[Antoine Pitrou]

Hi,

Le mardi 09 mai 2006 à 12:46 -0400, Phillip J. Eby a écrit :
> Unless this can be done by a third party, it's not at all the same 
> thing.  Currently in Python for a third party to add a mixin, they would 
> have to hack the class's __bases__, which I am not suggesting here at all.
> 
> In fact, it's pretty much the opposite of what I'm suggesting -- you 
> shouldn't *have* to make such declarations, let alone monkeypatch a class's 
> __bases__.

Interestingly, there was a GNU addition to C++ named "signatures" which
achieved roughly the same thing: some kind of compile-time duck-typing.

http://gcc.gnu.org/onlinedocs/gcc-2.95.3/gcc_5.html#SEC112

Apparently it has been removed in gcc 3 or 4.

Regards

Antoine.