Class TreeLattice<Impl>

This class defines a lattice method that is able to rollback (with discount) a discretized asset object. It will be based on one or more trees.

Derived classes must implement the following interface:

public:
  DiscountFactor discount(Size i, Size index) const;
  Size descendant(Size i, Size index, Size branch) const;
  Real probability(Size i, Size index, Size branch) const;

and may implement the following:

public:
  void stepback(Size i,
                const Array& values,
                Array& newValues) const;