RandomSample with specified random number generator

[Jens Mueller]

Joseph Rushton Wakeling wrote:
> On 12/06/12 14:58, Jens Mueller wrote:
> >Right. These are inconsistent. This should be fixed. Can't we just use a
> >default argument like
> >auto randomSample(R, Random)(R r, size_t n, Random gen = Random(unpredictableSeed));
> >
> >Currently the documentation does not even state what is difference
> >between the versions accepting a random generator vs. the ones without a
> >random generator.
> 
> ... so can we agree that a given random sample should _always_
> lazily evaluate to the same output, whether or not it's been given a
> specified RNG?
> 
> i.e. that
> 
>       auto sample = randomSample(iota(0, 100), 5);
>       writeln(sample);
>       writeln(sample);
>       writeln(sample);
> 
> ... should produce 3 times the same output?
> 
> If so I'll get to work on a bug report and a patch set and unittest.

Yes, I'll agree with you. But I don't know about others. It'll be nice
if others share their opinion such that your efforts won't be wasted.
That code was mostly written by Andrei and David.

Jens