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Struct template impl

boost::proto::_child_c::impl

Synopsis

// In header: <boost/proto/transform/arg.hpp>


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

  // public member functions
  proto::result_of::child_c<  
  (, , 
             ) ;
};

Description

impl public member functions

  1. proto::result_of::child_c<  
    ( expr, , 
               ) ;

    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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