.. _ContainerFly:

####################
Container on-the-fly
####################


The **on-the-fly** method is most advanced class and does not has any noticeable memory overhead compared to the other two approaches.
The basic idea is already implemented in the :ref:`State class<State>`, see :ref:`State_Conserve_Functions`, and can be understood in the limit of partitioning a system of size **L** into **L** parts.
While the :ref:`State class<State>` determines the index by calculating combinatorial coefficients **on-the-fly** the :ref:`Container class<ContainerFly>` determines all possible coefficients in advance making the approach much faster.
They are stored in :ref:`dimensions<ContainerFly_dimensions>`.


Data members
------------

.. _ContainerFly_dimensions:

.. doxygenvariable:: danceq::internal::ContainerFly::dimensions

.. doxygenvariable:: danceq::internal::ContainerFly::L const

.. doxygenvariable:: danceq::internal::ContainerFly::n_max const

.. doxygenvariable:: danceq::internal::ContainerFly::maximal_state_per_n

.. doxygenvariable:: danceq::internal::ContainerFly::minimal_state_per_n