Re: [boost] [review] Fusion review, result_of::make_pair missing

From: Tobias Schwinger (tschwinger_at_[hidden])
Date: 2006-05-07 17:24:28

Another one (hope my piecemeal reports are OK):

There is no "result_of::make_pair" metafunction. It is needed because of the 'detail::as_fusion_element' type transformation in "fusion::make_pair".

With this 

  // missing result metafunction for fusion::make_pair
  template<typename First, typename Second>
  struct result_of_make_pair
  {
    typedef boost::fusion::pair<First,
      typename boost::fusion::detail::as_fusion_element<Second>::type> type;
  };

workaround in place fusion::pair gives a very useful context structure for folding...

Regards,

Tobias