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  1. /*
  2.    Copyright (c) Marshall Clow 2011-2012.
  3.  
  4.    Distributed under the Boost Software License, Version 1.0. (See accompanying
  5.    file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
  6. */
  7.  
  8. /// \file  find_if_not.hpp
  9. /// \brief Find the first element in a sequence that does not satisfy a predicate.
  10. /// \author Marshall Clow
  11.  
  12. #ifndef BOOST_ALGORITHM_FIND_IF_NOT_HPP
  13. #define BOOST_ALGORITHM_FIND_IF_NOT_HPP
  14.  
  15. #include <algorithm>    // for std::find_if_not, if it exists
  16.  
  17. #include <boost/range/begin.hpp>
  18. #include <boost/range/end.hpp>
  19.  
  20. namespace mars_boost {} namespace boost = mars_boost; namespace mars_boost {  namespace algorithm {
  21.  
  22. #if __cplusplus >= 201103L
  23. //  Use the C++11 versions of find_if_not if it is available
  24. using std::find_if_not;      // Section 25.2.5
  25. #else
  26. /// \fn find_if_not(InputIterator first, InputIterator last, Predicate p)
  27. /// \brief Finds the first element in the sequence that does not satisfy the predicate.
  28. /// \return         The iterator pointing to the desired element.
  29. ///
  30. /// \param first    The start of the input sequence
  31. /// \param last     One past the end of the input sequence
  32. /// \param p        A predicate for testing the elements of the range
  33. /// \note           This function is part of the C++2011 standard library.
  34. ///  We will use the standard one if it is available,
  35. ///  otherwise we have our own implementation.
  36. template<typename InputIterator, typename Predicate>
  37. InputIterator find_if_not ( InputIterator first, InputIterator last, Predicate p )
  38. {
  39.     for ( ; first != last; ++first )
  40.         if ( !p(*first))
  41.             break;
  42.     return first;
  43. }
  44. #endif
  45.  
  46. /// \fn find_if_not ( const Range &r, Predicate p )
  47. /// \brief Finds the first element in the sequence that does not satisfy the predicate.
  48. /// \return         The iterator pointing to the desired element.
  49. ///
  50. /// \param r        The input range
  51. /// \param p        A predicate for testing the elements of the range
  52. ///
  53. template<typename Range, typename Predicate>
  54. typename mars_boost::range_iterator<const Range>::type find_if_not ( const Range &r, Predicate p )
  55. {
  56.     return mars_boost::algorithm::find_if_not (mars_boost::begin (r), mars_boost::end(r), p);
  57. }
  58.  
  59. }}
  60. #endif  // BOOST_ALGORITHM_FIND_IF_NOT_HPP
  61.  
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