replace.hpp 1.3 KB

123456789101112131415161718192021222324252627282930313233343536373839404142
  1. /*=============================================================================
  2. Copyright (c) 2001-2011 Joel de Guzman
  3. Distributed under the Boost Software License, Version 1.0. (See accompanying
  4. file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
  5. ==============================================================================*/
  6. #if !defined(FUSION_REPLACE_08182005_0830)
  7. #define FUSION_REPLACE_08182005_0830
  8. #include <boost/fusion/view/transform_view/transform_view.hpp>
  9. #include <boost/fusion/algorithm/transformation/detail/replace.hpp>
  10. #include <boost/fusion/support/is_sequence.hpp>
  11. #include <boost/utility/enable_if.hpp>
  12. namespace boost { namespace fusion
  13. {
  14. namespace result_of
  15. {
  16. template <typename Sequence, typename T>
  17. struct replace
  18. {
  19. typedef transform_view<Sequence, detail::replacer<T> > type;
  20. };
  21. }
  22. template <typename Sequence, typename T>
  23. inline
  24. typename
  25. enable_if<
  26. traits::is_sequence<Sequence>
  27. , typename result_of::replace<Sequence const, T>::type
  28. >::type
  29. replace(Sequence const& seq, T const& old_value, T const& new_value)
  30. {
  31. typedef typename result_of::replace<Sequence const, T>::type result;
  32. detail::replacer<T> f(old_value, new_value);
  33. return result(seq, f);
  34. }
  35. }}
  36. #endif