STRUCT TEMPLATE (3)

NAME
boost::proto::_default - A PrimitiveTransform that gives expressions their usual C++ behavior

SYNOPSIS

// In header: <boost/proto/transform/default.hpp>
template<typename Grammar = unspecified>
struct _default :  proto::transform< _default<Grammar> > {
  // member classes/structs/unions
  template<typename Expr, typename State, typename Data>
  struct impl :  proto::transform_impl<Expr, State, Data> {
    // types
    typedef typename Expr::tag_type Tag;          // For exposition only
    typedef see-below result_type;
    // public member functions
    result_type operator()(typename impl::expr_param,
                           typename impl::state_param,
                           typename impl::data_param) const;
    static Expr s_expr;    // For exposition only
    static State s_state;    // For exposition only
    static Data s_data;    // For exposition only
  };
};

DESCRIPTION

For the complete description of the behavior of the proto::_default transform, see the documentation for the nested proto::_default::impl<> class template.

When used without specifying a Grammar parameter, proto::_default behaves as if the parameter were proto::_default<>.