diff --git a/include/boost/intrusive/circular_list_algorithms.hpp b/include/boost/intrusive/circular_list_algorithms.hpp index 8c886aa..a4efc02 100644 --- a/include/boost/intrusive/circular_list_algorithms.hpp +++ b/include/boost/intrusive/circular_list_algorithms.hpp @@ -97,6 +97,16 @@ class circular_list_algorithms NodeTraits::set_previous(this_node, this_node); } + //! Effects: Returns true if this_node_points to an empty list. + //! + //! Complexity: Constant + //! + //! Throws: Nothing. + BOOST_INTRUSIVE_FORCEINLINE static bool is_empty(const_node_ptr this_node) BOOST_NOEXCEPT + { + return NodeTraits::get_next(this_node) == this_node; + } + //! Requires: this_node must be in a circular list or be an empty circular list. //! //! Effects: Returns true is "this_node" is the only node of a circular list: