class XBT_PRIVATE Mapping {
public:
/** Each host can have an arbitrary number of actors -> multimap **/
- typedef std::unordered_multimap<s4u::Host*, s4u::ActorPtr> host_to_actors_map_t;
+ using host_to_actors_map_t = std::unordered_multimap<s4u::Host*, s4u::ActorPtr>;
host_to_actors_map_t host_to_actors;
/** Each actor gets assigned to exactly one host -> map **/