Tuple mixins

[Bill Baxter]

Daniel Keep wrote:
> 
> 
> This is one thing I've never especially liked about C, C++ and now D.  I
> personally thing that the comma should be used to construct tuples like
> it is in Python, which is a hell of a lot more useful.  Plus, this
> behaviour is really friggin' weird :P
> 

Amen to that brutha.
It's main use in C and C++ is hackish macro tricks.  In C++ it also 
finds use as an overloadable operator you can use to confuse the heck 
out of people.

Are there any good uses for it?  Maybe the lists of initializers in for 
loops are using that rule?    like  -- for(x=3,y=10; x<y; x++) { ... }.
Seems like you could make that part of the for loop grammar instead of a 
really useless works anywhere rule.  Besides if it worked as a tuple 
maker, and multiple assigment worked then you could do
    for (x,y=3,10; x<y; x++) { . . . }

Definitely seems like a waste.

--bb