template<typename T>
struct  RandGenParams  {

    T   min_value { std::numeric_limits<T>::min() };
    T   max_value { std::numeric_limits<T>::max() };

    unsigned int    seed { static_cast<unsigned int>(-1) };

    // The p distribution parameter (probability of generating true)
    //
    double          prob_true { 0.5 };
    // The t or k distribution parameter (number of trials)
    //
    std::size_t     t_dist { 1 };
    // The μ distribution parameter (the mean of the distribution)
    //
    double          mean { 0 };
    // the σ distribution parameter (standard deviation)
    //
    double          std { 1 };
    // The λ distribution parameter (the rate parameter)
    //
    double          lambda { 1.0 };
    // The α distribution parameter (shape, location)
    //
    double          alpha { 1.0 };
    // The β distribution parameter (scale)
    //
    double          beta { 1.0 };
    // The m distribution parameter (log-scale)
    //
    double          m { 0 };
    // The s distribution parameter (shape)
    //
    double          s { 1.0 };
    // The n distribution parameter (degrees of freedom)
    //
    double          n { 1.0 };
    // Degrees of freedom for fisher_f_distribution
    //
    double          n2 { 1.0 };
};