_Oper
typedef _UnBase<_Oper, _Dom> _Base;
typedef _UnBase<_Oper, valarray<_Tp> > _Base;
typedef _BinBase<_Oper,_Dom1,_Dom2> _Base;
typedef _BinBase<_Oper,valarray<_Tp>,valarray<_Tp> > _Base;
typedef _BinBase<_Oper,_Dom,valarray<_Tp> > _Base;
typedef _BinBase<_Oper,valarray<_Tp>,_Dom> _Base;
typedef _BinBase2<_Oper,_Dom> _Base;
typedef _BinBase1<_Oper,_Dom> _Base;
typedef _BinBase2<_Oper,valarray<_Tp> > _Base;
typedef _BinBase1<_Oper,valarray<_Tp> > _Base;