On 06/26/10 00:11, Neil Hodgson <nyamatongwe+thun...@gmail.com> wrote:
> WANG Cong: > >> 4) Also, this will _somewhat_ violate the OOP princples, in OOP, >> this is and should be implemented by inherence. > > Most object oriented programming languages starting with Smalltalk > have allowed adding attributes (addInstVarName) to classes at runtime. Thanks, I have to admit that I know nothing about Smalltalk. >From what you are saying, Smalltalk picks a way similar to setattr() in Python? Because you mentioned 'addInstVarName' which seems to be a method or a builtin function. If so, that is my point, as I mentioned earlier, switching to setattr() by default, instead of using assignments by default. :) > Low level OOPLs like C++ and Delphi did not implement this for > efficiency reasons. > Hmm, although this is off-topic, I am interested in this too. C++ does have metaprogramming, but that is actually static metaprogramming (using templates), not dynamic metaprogramming here. I am wondering if efficiency is the only reason why C++ doesn't have dynamic metaprogramming, since C++ is a static programming language I think if this limits C++ to implement its dynamic metaprogramming actually... Thanks. -- Live like a child, think like the god. -- http://mail.python.org/mailman/listinfo/python-list
