boost/fusion/algorithm/query/none.hpp

   1 /*=============================================================================
   2     Copyright (c) 2001-2006 Joel de Guzman
   3     Copyright (c) 2007 Dan Marsden
   4
   5     Distributed under the Boost Software License, Version 1.0. (See accompanying
   6     file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
   7 ==============================================================================*/
   8 #if !defined(BOOST_FUSION_NONE_07062005_1128)
   9 #define BOOST_FUSION_NONE_07062005_1128
  10
  11 #include <boost/fusion/algorithm/query/any.hpp>
  12
  13 namespace boost { namespace fusion
  14 {
  15     namespace result_of
  16     {
  17         template <typename Sequence, typename F>
  18         struct none
  19         {
  20             typedef bool type;
  21         };
  22     }
  23
  24     template <typename Sequence, typename F>
  25     inline bool
  26     none(Sequence const& seq, F f)
  27     {
  28         return !fusion::any(seq, f);
  29     }
  30 }}
  31
  32 #endif
  33