_Arg
typedef _Dom _Arg;
typedef valarray<_Tp> _Arg;
typedef typename _Dom1::value_type _Arg; \
typedef typename _Dom::value_type _Arg; \
typedef typename _Dom::value_type _Arg; \
typedef _BinClos<_Name,_Constant,_Expr,_Arg,_Dom> _Closure; \
typedef typename _Dom::value_type _Arg; \
typedef typename _Dom1::value_type _Arg; \
typedef typename _Dom::value_type _Arg; \
typedef typename _Dom::value_type _Arg; \
typedef _BinClos<_Name,_Constant,_Expr,_Arg,_Dom> _Closure; \