Boost C++ Libraries

...one of the most highly regarded and expertly designed C++ library projects in the world. — Herb Sutter and Andrei Alexandrescu, C++ Coding Standards

Header <boost/numeric/odeint/stepper/stepper_categories.hpp>

namespace boost {
  namespace numeric {
    namespace odeint {
      struct stepper_tag;
      struct error_stepper_tag;
      struct explicit_error_stepper_tag;
      struct explicit_error_stepper_fsal_tag;
      struct controlled_stepper_tag;
      struct explicit_controlled_stepper_tag;
      struct explicit_controlled_stepper_fsal_tag;
      struct dense_output_stepper_tag;
      template<typename tag> struct base_tag;

      template<> struct base_tag<stepper_tag>;
      template<> struct base_tag<error_stepper_tag>;
      template<> struct base_tag<explicit_error_stepper_tag>;
      template<> struct base_tag<explicit_error_stepper_fsal_tag>;
      template<> struct base_tag<controlled_stepper_tag>;
      template<> struct base_tag<explicit_controlled_stepper_tag>;
      template<> struct base_tag<explicit_controlled_stepper_fsal_tag>;
      template<> struct base_tag<dense_output_stepper_tag>;
    }
  }
}