What is this doing?

[m1rjj00]

I'm maintaining code that I didn't write and there is a struct in which an item is the name of the struct with parens (see below). What is this feature doing?


//-----------------------------------------------------------
// A tracker for federates.
//-----------------------------------------------------------
struct Tracker
{
VSAssociatedFederateTypeEnum relation;
VSEntityTypeEnum entityType;
CVSLocalString objectType;
CVSLocalString federate;
typedef std::set<CVSIOSBaseObjectCore*> ObjectSet;
ObjectSet assignedObjects;
long capacity;
Tracker(); <----------- I don't get it.
bool full() const;
long remaining() const;
bool assign(CVSIOSBaseObjectCore* pObj);
bool isAssigned(CVSIOSBaseObjectCore* pObj) const;
void unassign(CVSIOSBaseObjectCore* pObj);
void reset();
};

Thanks!

[Texan40]

It looks like a constructor for the structure.