Const Tuples

[bearophile via Digitalmars-d-learn]

Dicebot:

> std.typecons.Tuple is just a subset of all structs implementing 
> specific behavior. It still acts as struct everywhere when 
> applicable.

A subset is not the same as the whole set.

You are missing something important about what a data structure 
is. Take a look at your computer science books.

Another example: a dynamic array allows several operations, 
including append at the end and pop from the end. If I define a 
Stack data structure based on a dynamic array with just its 
pop/append/empty/length operations, I have defined a new data 
structure.

Bye,
bearophile