DIP19: Remove comma operator from D and provision better syntactic support for tuples

[bearophile]

deadalnix:

> The problem with tuple() isn't its syntax, but what you can or 
> can't do with the resulting tuple.

See my first posts in this thread :-)

On the other hand it's handy to have a compact syntax for 
something you use often 
(http://en.wikipedia.org/wiki/Zipf%27s_law ).

Bye,
bearophile