Note – You may also want to check other answers, especially the one with decltype and lambda
You should declare a class Compare
and overload operator()
for it like this:
class Foo { }; class Compare { public: bool operator() (Foo, Foo) { return true; } }; int main() { std::priority_queue<Foo, std::vector<Foo>, Compare> pq; return 0; }
Or, if you for some reasons can’t make it as class, you could use std::function
for it:
class Foo { }; bool Compare(Foo, Foo) { return true; } int main() { std::priority_queue<Foo, std::vector<Foo>, std::function<bool(Foo, Foo)>> pq(Compare); return 0; }
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