Direction robust_scm2dir (SCM, Direction);
Drul_array<Real> robust_scm2drul (SCM, Drul_array<Real>);
Drul_array<bool> robust_scm2booldrul (SCM, Drul_array<bool>);
Interval robust_scm2interval (SCM, Drul_array<Real>);
Offset robust_scm2offset (SCM, Offset);
Direction robust_scm2dir (SCM, Direction);
Drul_array<Real> robust_scm2drul (SCM, Drul_array<Real>);
Drul_array<bool> robust_scm2booldrul (SCM, Drul_array<bool>);
Interval robust_scm2interval (SCM, Drul_array<Real>);
Offset robust_scm2offset (SCM, Offset);