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STL set_intersection runtime error


You are trying to write objects to an empty vector. You probably meant to use

std::set_intersection(v1.begin(),
v1.end(), v2.begin(), v2.end(),
                      std::back_inserter(v_in),
                     [](const Mclass& arg1,
const Mclass& arg2)
    {

        return (arg1.id < arg2.id);
    });

Note the addition of using std::back_inserter() to the output range. Also, as Igor Tandetnik pointed out in a comment, the predicate has to define a strict weak order on the objects not an equality relation. Note, that the inputs need to be sorted (in your example you created them sorted).


Categories : C++

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