Problem when i try to sort using lamda expresion in c++

Question

I have to order by discovery date an Artefact and print the content .

I have this class :

class Artifact{
protected:
    int discoveryDate_;
    int estimatedDateOfOrigin_;
    Artifact::artifactType _artifactType;
    Artifact::condition_ _condition;
};

I also have 2 derived class GreekArtifact and Egypteam artifact and i created 5 object of GreekArtifact and 5 objects of Egypteam artifact and i added them in a list

std::list<Artifact> artifacts;

And i tried to sort this list by discovery date and i did this :

 std::sort(artifacts.begin(),artifacts.end(),[](auto &a, auto &b){
        return a->getDiscoveryDate() > b->getDiscoveryDate();
   });

and this sort doesnt work and i dont know why and i really dont understand the error that sounds like this :

error: no match for 'operator-' (operand types are 'std::_List_iterator<Artifact>' and 'std::_List_iterator<Artifact>')
     std::__lg(__last - __first) * 2,

Can you please help me to figure out what i did wrong??

`std::sort` is incompatible with `std::list`. Either use another (random access) container like `std::vector`, or `std::list::sort()` member function. — Evg, Apr 28 '20 at 11:51
@sdfjhsbfjskfck What is this Artifact::artifactType _artifactType; Artifact::condition_ _condition;? — Vlad from Moscow, Apr 28 '20 at 11:52
@sdfjhsbfjskfck The class template std::list has its own ,method sort. — Vlad from Moscow, Apr 28 '20 at 11:53
It worked and i did like this ```artifacts.sort([](auto &a, auto &b){ return a.getDiscoveryDate() < b.getDiscoveryDate(); });``` Thank you Evg — jsdfjhsbfjskfck, Apr 28 '20 at 11:56

Problem when i try to sort using lamda expresion in c++

0 Answers0