how to expand tuple?

[Ali Çehreli via Digitalmars-d-learn]

On 11/01/2014 01:34 PM, Suliman wrote:

 > Or auto mean structure of data, that have not standard type
 > like (int or string)?

D is a strongly typed language, so every variable has its specific type.

D also has type inference, meaning that we don't need to specify types 
explicitly. In theory, even the following could work:

     t = tuple(42, 1.5);

and the type of t would be Tuple!(int, double). However, the syntax 
rules require a keyword before t. If t could be either one of the 
following, we could simply write:

     const t = ...
     immutable t = ...
     shared t = ...
     static t = ...

The problem is when t is not either one of those. In that case auto 
comes to the rescue:

     auto t = ...

Note that auto (meaning "automatic storage duration") is actually 
redundant there but works well because it kind of means "infer the type 
automatically." Hm. It is redundant even there because "infer" implies 
"automatic" :p.

Ali