Reference or Value Semantics for Graph Traversal Range

["Nordlöw" via Digitalmars-d-learn]

On Wednesday, 18 February 2015 at 13:53:17 UTC, Tobias Pankrath 
wrote:
>> All the data members except distMap have reference semantics.
>
> I thought AAs had reference semantics.

Me too, but the indeed have value semantics. See for example:

unittest
{
     string[int] x;
     auto y = x;
     x[0] = "zero";
     assert(x != y);
}


This makes usage of storing internal state in Ranges bug-prone.


Isn't there some way to store an AA in reference wrapper?

This would simplify my .save member.