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c++qtdictionaryqmap

QMap with pointer as key

I am using QMap and I have pointers to the object as keys of the map. Using std::map I would write a comparator for pointers and declare my map as follow

std::map<Key*, Value, ComparatorOfPointers<Key> >

How I have to do with QMap? I cannot find in Qt documentation which template parameters are acceptable.

Solution

  • QMap (unlike std::map) always uses operator< to compare the keys. So you will have to wrap the pointer in a class and define a suitable operator< for that class.