Const Tuples

[Dicebot via Digitalmars-d-learn]

On Friday, 25 April 2014 at 11:51:48 UTC, bearophile wrote:
> They are not the same type:
>
>
> void main() {
>     import std.typecons: Tuple;
>     alias T1 = const Tuple!(int, int);
>     alias T2 = Tuple!(const int, const int);
>     static assert(is(T1 == T2)); // Fails.
> }
>
>
> This type difference causes some troubles when you use tuples.
>
> Bye,
> bearophile

Why would you even expect those to be same types? These 2 types 
are also different:

struct A
{
     const int x;
}

alias A_ = const(A);