There is a problem with matching template static constexpr function member in the following :
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#include <iostream>

/// \brief Class
class Class
{
    public: template <typename Type> static constexpr Type function();
};

/// \brief Function
template <typename Type>
constexpr Type Class::function()
{
    return 0;
}

int main()
{
    return 0;
}
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Doxygen generates two documentations for function() including an empty one.