The random generation is the same at each loop iteration

[G4m4]

When a loop body contain a random generation such as:

std::generate(data.begin(), data.end(), std::bind(kNormDistribution, kRandomGenerator));

The random engine actually gets reinitialised at each loop iteration, resulting in the data being the same at each iteration. This has to be fixed.

[G4m4]

This may be fixed by using a lambda:

std::generate(data.begin(), data.end(), [&] {return kNormDistribution(kRandomGenerator);});