S4
=====================================

The **S4** class is a wrapper of S4 objects in R.

Public Member Functions
-------------------------

Constructors
~~~~~~~~~~~~~~

.. cpp:function:: S4()

   Default constructor. Resulting in ``R_NilValue``.

.. cpp:function:: S4(const S4& other)

   Copy constructor. Resulting object will share the SEXP data with *other*.

``template <typename Proxy>``

.. cpp:function:: S4(const GenericProxy<Proxy>& proxy)

   Create object from a proxy, such as attribute, slot, field, etc.

.. cpp:function:: S4(SEXP x)

   Wrap a given S4 object.

.. cpp:function:: S4(const std::string& klass)

   Create an S4 object of the requested class.

Defined in **S4**
~~~~~~~~~~~~~~~~~~~~~~~~~~~

.. cpp:function:: bool is(const std::string& clazz) const
   
   Whether this object is an instance of the given S4 class.

Inherited from other classes
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

See :doc:`RObject`.