I have a pickling problem I suspect is just not possible to solve.
I have some wrappers around boost::random objects.
There is a rng object, which is a single underlying mersenne twister.
There are various distributions. For example, uniform_real.
Each uniform_real holds a reference to the single, external mt object.
I don't think there's any way to unpickle several instance of uniform_real so
that their references to the (shared) mt object get correctly restored.
Imagine something like this:
class mt;
struct uniform_real {
mt & _mt;
uniform_real (mt &, min, max) ...
};
When unpickled, the internal _mt states are saved and restored correctly, but 2
instances of uniform_real will not share a reference to a single mt object,
they
each have their own copy which starts with a copy of the same state (no good).
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