[Boost-users] Boost. Parameter and deduced constructor ?

From: StephQ (pelux_at_[hidden])
Date: 2007-11-26 19:51:31

Thank you for your previous help with the Boost. Parameter library, I have been
able to solve my problem.

I would like to know if is it possible in any way to exploit the Boost.
Parameter library to get a template class with a constructor that automatically
deduce the correct template parameters.

If not I would like to know if there exist a convenient way to minimize the pain
resulting from template classes.
For example now I have to write:

VariateSampler< 
  GaussianDistribution,
  MersenneTwisterPseudoRng> 
gaussianSampler( myGenerator, GaussianDistribution() );

Creating a make_VariateSampler function alone does not buy me anything. 
I would
like to write:

I would really like to write:
VariateSampler<> gaussianSampler = make_VariateSampler( myGenerator,
GaussianDistribution() );
VariateSampler<> poissonSampler = make_VariateSampler( myGenerator,
PossionDistribution() );

and gaussianSampler and poissonSampler be of different types 
(deduced from the rhs):
gaussianSampler of type
VariateSampler<MersenneTwisterPseudoRng,GaussianDistribution>
and poissonSampler of type
VariateSampler<MersenneTwisterPseudoRng,PoissonDistribution>

Now, these types are not complicated, but I am using a template decorator
approach to modify the behaviour of these samplers and the resulting types are
too nasty for anyone to write them.

How could I improve the situation? Something like boost::function for classes?

The point is that I (the user) could not care less about these types, only the
sampler class needs to know them to operate correctly.

Do I have necessarily to create them (via a make_VariateSampler) and pass them
on the fly where needed?

Thank you
StephQ