Function get_noncopyable

tests/test_virtual_functions.cpp:139–139

    NCVirt() = default;
    NCVirt(const NCVirt &) = delete;
    virtual NonCopyable get_noncopyable(int a, int b) { return NonCopyable(a, b); }
    virtual Movable get_movable(int a, int b) = 0;

    std::string print_nc(int a, int b) { return get_noncopyable(a, b).get_value(); }