CODEWITHSUNDEEP
c++vectorstd
user1043761
user1043761

Reputation: 716

Getters/Setters with std::vector<>.push_back(...)

For some reason this doesn't work. It compiles file, but no items are added to this vector when using a getter.

E.G.

class class_name {

    public:
        inline std::vector<int> get_numbers() { return m_numbers; }    

    private:
        std::vector<int> m_numbers;
}

....

{
    class_name number_list;
    number_list.get_numbers().push_back(1);
}

If I do it directly (m_numbers.push_back(1)) it works, but if I pull it out with a getter it won't add anything.

Upvotes: 3

Views: 3022

Answers (1)

John Kugelman
John Kugelman

Reputation: 361849

Return the vector by reference if you plan to modify it:

inline std::vector<int> &get_numbers() { return m_numbers; }  
                        ^

Without the ampersand a copy is returned.

Upvotes: 9

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