I dun a DIP, possibly the best DIP ever

[Stefan Koch]

On Thursday, 23 April 2020 at 20:08:51 UTC, Stefan Koch wrote:
>
> k tuples with n elements can only expand to 1 tuple with k*n 
> elements.
> They can't get more.

Acutely let me be more specific.

given TTup = T!(int, long, double, float)
the expression cast(TTup)0... yields
tuple(0, 0L, 0.0, 0.0f)
given VTup = T!(1, 2, 3, 4)
you can write the expression cast(TTup)VTup...
which yields tuple(1, 2L, 3.0, 4.0f)
should the length's of the tuple in and subexpression using 
multiple tuples differ, that's an error.