.. _Iterator_Constructors:

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Constructors
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The :ref:`BasisIterator<Iterator>` requires a :ref:`Basis class<BasisU1>` instance that creates the :ref:`BasisIterator<Iterator>`.
It can be created using a :ref:`State<State>` or an index referring to the enumeration of the :ref:`Basis<BasisU1>`.


.. doxygenfunction:: danceq::internal::BasisIterator::BasisIterator(const BasisU1 * basisptr_, typename BasisIterator<BasisU1>::state_class & state_)

.. doxygenfunction:: danceq::internal::BasisIterator::BasisIterator(const BasisU1 * basisptr_, uint64_t index_, bool trigger_error = true)