From: Michael Stevens (Michael.Stevens_at_[hidden])
Date: 2003-02-25 04:49:10
Dear Boosters,
This is just a quick reminder of regression before boost_1_30_0 gets
released. Without CVS access I can fix it myself and Jens seems to be
offline at the moment. It would be great if someone could step in and
make a simple correction.
The regression is the the return values of the mean and sigma values of
boost::random::lognormal_distribution.
Correction required for boost/random/lognormal_distribution. hpp line 67-68
RealType& mean() const { return _mean; }
RealType& sigma() const { return _sigma; }
should read.
RealType mean() const { return _mean; }
RealType sigma() const { return _sigma; }
The correction makes the return values identical with those of other
real distributions, cf. normal_distribution line 62
The problem can simply be tested by instantiating the template thus
template boost::normal_distribution<boost::mt19937, float>;
It should be noted that the problem is NOT picked up by regression tests
in random_test.cpp. The current test procedure
void instantiate_dist(const char * name, const Dist& dist)
uses a reference to a constant distribution. It therefore fails to
pickup on the return of non constant member reference.
All the best,
Michael Stevens