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  1. /*
  2.    Copyright (c) Marshall Clow 2008-2012.
  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  none_of.hpp
  9. /// \brief Test ranges to see if no elements match a value or predicate.
  10. /// \author Marshall Clow
  11.  
  12. #ifndef BOOST_ALGORITHM_NONE_OF_HPP
  13. #define BOOST_ALGORITHM_NONE_OF_HPP
  14.  
  15. #include <algorithm>    // for std::none_of, if available
  16. #include <boost/range/begin.hpp>
  17. #include <boost/range/end.hpp>
  18.  
  19. namespace mars_boost {} namespace boost = mars_boost; namespace mars_boost {  namespace algorithm {
  20.  
  21. //  Use the C++11 versions of the none_of if it is available
  22. #if __cplusplus >= 201103L
  23. using std::none_of;     // Section 25.2.3
  24. #else
  25. /// \fn none_of ( InputIterator first, InputIterator last, Predicate p )
  26. /// \return true if none of the elements in [first, last) satisfy the predicate 'p'
  27. /// \note returns true on an empty range
  28. ///
  29. /// \param first The start of the input sequence
  30. /// \param last  One past the end of the input sequence
  31. /// \param p     A predicate for testing the elements of the sequence
  32. ///
  33. template<typename InputIterator, typename Predicate>
  34. bool none_of ( InputIterator first, InputIterator last, Predicate p )
  35. {
  36. for ( ; first != last; ++first )
  37.     if ( p(*first))
  38.         return false;
  39.     return true;
  40. }
  41. #endif
  42.  
  43. /// \fn none_of ( const Range &r, Predicate p )
  44. /// \return true if none of the elements in the range satisfy the predicate 'p'
  45. /// \note returns true on an empty range
  46. ///
  47. /// \param r     The input range
  48. /// \param p     A predicate for testing the elements of the range
  49. ///
  50. template<typename Range, typename Predicate>
  51. bool none_of ( const Range &r, Predicate p )
  52. {
  53.     return mars_boost::algorithm::none_of (mars_boost::begin (r), mars_boost::end (r), p );
  54. }
  55.  
  56. /// \fn none_of_equal ( InputIterator first, InputIterator last, const V &val )
  57. /// \return true if none of the elements in [first, last) are equal to 'val'
  58. /// \note returns true on an empty range
  59. ///
  60. /// \param first The start of the input sequence
  61. /// \param last  One past the end of the input sequence
  62. /// \param val   A value to compare against
  63. ///
  64. template<typename InputIterator, typename V>
  65. bool none_of_equal ( InputIterator first, InputIterator last, const V &val )
  66. {
  67.     for ( ; first != last; ++first )
  68.         if ( val == *first )
  69.             return false;
  70.     return true;
  71. }
  72.  
  73. /// \fn none_of_equal ( const Range &r, const V &val )
  74. /// \return true if none of the elements in the range are equal to 'val'
  75. /// \note returns true on an empty range
  76. ///
  77. /// \param r     The input range
  78. /// \param val   A value to compare against
  79. ///
  80. template<typename Range, typename V>
  81. bool none_of_equal ( const Range &r, const V & val )
  82. {
  83.     return mars_boost::algorithm::none_of_equal (mars_boost::begin (r), mars_boost::end (r), val);
  84. }
  85.  
  86. }} // namespace boost and algorithm
  87.  
  88. #endif // BOOST_ALGORITHM_NONE_OF_HPP
  89.  
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