Re: [Boost-users] [random] streamable state of normal_distribution to ostream not accurate

Subject: Re: [Boost-users] [random] streamable state of normal_distribution to ostream not accurate
From: Dave Steenburgh (dave.steenburgh_at_[hidden])
Date: 2008-11-06 19:44:22

>
>   mt19937 rng;
>   normal_distribution<> gauss;
>   variate_generator<mt19937&, normal_distribution<> > var(rng, gauss);

gauss is passed by value, and so var has a copy of it.  This means that when
you generate values with var, the state of gauss does not change.

>       cerr << gauss << endl; //dumps object internal state

The distribution() function of the variate_generator class returns a
reference to the distribution being used.  Try this instead:

cerr << var.distribution() << endl;

Then you should see the state changing; I did.