Chris R Miller wrote:
Jacob Carlborg wrote:
Walter Bright wrote:
Setting aside the technical issues for the moment, isn't that exactly
what inheritance is supposed to be good for?
A few times I've had the need for this, I've always been able to solve
the problem but it would have been easier with support for this. But
to be honest I don't remember these problems right now, so perhaps
it's not that important.
I think it has less to do with how often its needed and more to do with
how much more elegant the solution will be.
Just because I want to supply one example of where it's even appropriate
to use a category-pattern to extend a class' function table without
extending the class into a new type, I'll just spit out something I just
wrote in Objective-C.
===== Short Story =====
I needed to search through a String (NSString) specifically to know
whether a character at a specific index is any one of a given set of
characters. Rather than subclass NSString, I decided to make a category:
> [snip]
Won't all of this be solved by the planned D2 feature of making these
operations synonymous for all types?
void fn(T val);
T t;
fn(t);
t.fn();
Or are you saying that these added functions can actually access private
data in the class?
Sean
