A few thoughts on std.allocator

[Dicebot via Digitalmars-d]

On Tuesday, 12 May 2015 at 17:21:04 UTC, Steven Schveighoffer 
wrote:
> The one that always comes to my mind is array appending:
>
> immutable int[] x = new int[5];
>
> const int[] y = x;
>
> x ~= 1; // should this lock;
>
> y ~= 1; // should this lock?

As per my udnerstanding `shared` should _never_ result in 
automatic locking or barriers or whatever. It is simply a tag 
qualfier, with no extra magical semantics.