optional<T>

This is an implemention of optional from the standard library_. If it detects that a proper optional exists, it will attempt to use it. This is mostly an implementation detail, used in the :ref:sol::stack::check_get<stack-check-get> and :ref:sol::stack::get\<optional\<T>><stack-get> and sol::optional<T> maybe_value = table["arf"]; implementations for additional safety reasons.

See this example here_ for a demonstration on how to use it and other features!

.. _optional from the standard library: http://en.cppreference.com/w/cpp/utility/optional .. _this example here: https://github.com/ThePhD/sol2/blob/develop/examples/source/optional_with_iteration.cpp