(void) ¶(const objective_fcn) ¶(const objective_fcn, const gradient_fcn) ¶(const Objective &a) ¶Objective& operator = (const Objective &a) ¶objective_fcn objective_function (void) const; ¶Objective& set_objective_function (const objective_fcn) ¶gradient_fcn gradient_function (void) const; ¶Objective& set_gradient_function (const gradient_fcn) ¶