是否可以返回带有自定义排序函数的关联容器？

#include <iostream>
#include <map>

struct MyCompare {
    bool operator()(const int& a, const int& b) const {
        return a > b; // 降序排序
    }
};

int main() {
    std::map<int, std::string, MyCompare> myMap;
    myMap[1] = "one";
    myMap[2] = "two";
    myMap[3] = "three";

    for (const auto& pair : myMap) {
        std::cout << pair.first << ": " << pair.second << std::endl;
    }

    return 0;
}

#include <iostream>
#include <map>

int main() {
    auto myCompare = [](const int& a, const int& b) {
        return a > b; // 降序排序
    };

    std::map<int, std::string, decltype(myCompare)> myMap(myCompare);
    myMap[1] = "one";
    myMap[2] = "two";
    myMap[3] = "three";

    for (const auto& pair : myMap) {
        std::cout << pair.first << ": " << pair.second << std::endl;
    }

    return 0;
}