D with experimental features like tuple unpacking

[renoX]

On Friday, 22 March 2013 at 11:14:47 UTC, Dmitry Olshansky wrote:
> I'd hate any solution that distances ordinary structs, library 
> tuples and fixed-sized arrays.

Are struct/tuples similar to fixed-sized array?
I thought that both are different because you can select which 
element you access at runtime in an array, but usually this is 
not possible with structs and tuples where this is selected at 
compile time and then I thought about reflection and I'm not so 
sure..