#include <iostream>
#include <list>
#include "test_list_sort.h"

int main()
{
    std::list<test_list_sort> ltls;
    ltls.push_back(std::string("1"));
    ltls.push_back(std::string("2"));
    ltls.push_back(std::string("3"));
    ltls.push_back(std::string("11"));
    ltls.push_back(std::string("22"));
    ltls.push_back(std::string("33"));
    // 调用默认的排序方法
    ltls.sort();
    std::cout << "default sort" << std::endl;
    for (auto& it : ltls)
    {
        std::cout << it.value() << " < ";
    }
    std::cout << std::endl;
    // 调用自定义的排序方法
    ltls.sort([](const test_list_sort& a, const test_list_sort& b)->bool {
            return a.value() > b.value();
        });
    std::cout << "my sort" << std::endl;
    for (auto & it : ltls)
    {
        std::cout << it.value() << " > ";
    }
    std::cout << std::endl;
    return 0;
}

#pragma once
#include<string>

class test_list_sort
{
public:
    test_list_sort(const std::string& v):m_value(v){}
    test_list_sort(const test_list_sort& r) :m_value(r.value()) {};
    test_list_sort& operator=(const test_list_sort& r){ 
        m_value = r.value();
        return *this;
    };
    const std::string& value() const { return m_value; }
    bool operator<(const test_list_sort& r) { return value() < r.value(); }
private:
    std::string m_value{ "" };
};