The QIntCache class is a template class that provides a cache based on long keys. ... QIntCache  ( const QIntCache<type> & c )  . ... QIntCache  ()  . ... A cache is a least recently used (LRU) list of cache items. Each cache item has a cost. The sum of item costs, totalCost (), will not exceed the maximum cache cost, maxCost (). ... This function looks up an item, returns it, and by default marks it as being the least recently used item. ... Returns the total cost of the items in the cache. ...