QMap operator <

main.cpp

#include <QMap>
using namespace std;
class Something {
      public:
	string blob1;
	int    id2 = 0;
};

class Weird1 {
      public:
	string    name;
	uint32_t  id       = 0; //Only this parameter is used to define the UNIQUENESS!!!
	bool      whatever = false;
	Something s1;
};

bool operator<(const Weird1& e1, const Weird1& e2) {
	//almost Everything is IGNORED!!!
	return e1.id < e2.id;
}


int main() {
	QMap<Weird1, string> qtMap;
	Weird1               k1;

	k1.id = 1;
	qtMap.insert(k1, "v1");
}