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Struct template impl

boost::proto::_child_c::impl

Synopsis

template<typename Expr, typename State, typename Data> 
struct impl :  proto::transform_impl< Expr, State, Data > {
  // types
  typedef typename proto::result_of::child_c< Expr, N >::type result_type;

  // public member functions
  typename proto::result_of::child_c< typename impl::expr_param, N >::type 
  operator()(typename impl::expr_param, typename impl::state_param, 
             typename impl::data_param) const;
};

Description

impl public member functions

  1. typename proto::result_of::child_c< typename impl::expr_param, N >::type 
    operator()(typename impl::expr_param expr, typename impl::state_param, 
               typename impl::data_param) const;

    Returns the N-th child of expr

    Parameters:

    expr

    The current expression.

    Requires:

    Expr::proto_arity::value > N

    Returns:

    proto::child_c<N>(expr)

    Throws:

    Will not throw.

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