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Struct template complement

boost::proto::complement — A metafunction for generating complement expression types, a grammar element for matching complement expressions, and a PrimitiveTransform that dispatches to the proto::pass_through<> transform.


template<typename T> 
struct complement :  proto::transform< complement<T> > {
  // types
  typedef proto::expr< proto::tag::complement, proto::list1< T > > type;           
  typedef type                                                     proto_base_expr;
  template<typename Expr, typename State, typename Data> 
  struct impl :
     proto::pass_through<complement>::template impl<Expr, State, Data>