std::string Spline::type() const { return gsl_spline_name(_spline); }
static VALUE rb_gsl_spline_name(VALUE obj) { rb_gsl_spline *p = NULL; Data_Get_Struct(obj, rb_gsl_spline, p); return rb_str_new2(gsl_spline_name(p->s)); }
const char * getType() const {return gsl_spline_name(spline[0]);}