- XBT_DECLARE_ENUM_CLASS(State, INITED, STARTING, STARTED, CANCELED, FINISHED);
+ XBT_DECLARE_ENUM_CLASS(State, INITED, STARTING, STARTED, FAILED, CANCELED, FINISHED);
+
+ virtual bool is_assigned() const = 0;
+ bool dependencies_solved() const { return dependencies_.empty(); }
+ bool has_no_successor() const { return successors_.empty(); }
+ const std::set<ActivityPtr>& get_dependencies() const { return dependencies_; }
+ const std::vector<ActivityPtr>& get_successors() const { return successors_; }