What is the use case of RandomCover?

[Joseph Rushton Wakeling]

On 02/19/2013 01:25 PM, monarch_dodra wrote:
> If it keeps a copy, how it is passed (value or ref) actually becomes irrelevant.

Yes, I didn't explain myself well there.  The real problem is that copying 
really duplicates the RNG rather than just copying a reference to the RNG engine.

> This is also a strong argument for the reference semantic PRNG approach.

Yes.  Are you having any luck in discussions on how to map out a random2 where 
this will be implemented?  I remember your original code was rejected as a plain 
update to Phobos because of fears over code breakage (though TBH I think this is 
a case where if you break someone's code you're doing them a favour, as they 
were probably doing something unwise).