logical_not
using __STD::logical_not;
_Expr<_UnClos<logical_not,_ValArray,_Tp>,bool> operator! () const;
inline _Expr<_UnClos<logical_not,_ValArray,_Tp>, bool>
_Expr<_UnClos<logical_not,_Expr,_Clos>, bool>
inline _Expr<_UnClos<logical_not,_Expr,_Dom>, bool>
struct logical_not : public unary_function<_Tp,bool>