Mir Random [WIP]

[Andrei Alexandrescu via Digitalmars-d]

On 11/23/2016 05:47 AM, Joseph Rushton Wakeling wrote:
> On Wednesday, 23 November 2016 at 01:34:23 UTC, Andrei Alexandrescu wrote:
>> I'm unclear on what that statistically unsafe default behavior is - my
>> understanding is it has to do with RNGs being inadvertently copied. It
>> would be great to formalize that in a well-explained issue.
>
> I'll see if I can write that up in depth some time soon.  TBH though I
> think the problem is less about RNGs and more about stuff like
> RandomSample and RandomCover (and, in future, random distributions that
> have internal state, like a struct implementing a normal distribution
> using the Ziggurat algorithm internally).
>
> It's not so difficult to stop RNG state being copied inadvertently, but
> when you have ranges wrapping ranges wrapping ranges, each containing
> their own extra state that cannot be copied by value, things get a bit
> more complicated.

Well we need to get to the bottom of this if we're to make progress. 
Otherwise it's copypasta with little changes followed by disappointment 
all the way down. -- Andrei