ceph/src/boost/libs/algorithm/include/boost/algorithm/cxx11/any_of.hpp

   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     For more information, see http://www.boost.org
   8 */
   9
  10 /// \file
  11 /// \brief Test ranges to see if any elements match a value or predicate.
  12 /// \author Marshall Clow
  13
  14 #ifndef BOOST_ALGORITHM_ANY_OF_HPP
  15 #define BOOST_ALGORITHM_ANY_OF_HPP
  16
  17 #include <boost/range/begin.hpp>
  18 #include <boost/range/end.hpp>
  19
  20 namespace boost { namespace algorithm {
  21
  22 /// \fn any_of ( InputIterator first, InputIterator last, Predicate p )
  23 /// \return true if any of the elements in [first, last) satisfy the predicate
  24 /// \note returns false on an empty range
  25 ///
  26 /// \param first The start of the input sequence
  27 /// \param last  One past the end of the input sequence
  28 /// \param p     A predicate for testing the elements of the sequence
  29 ///
  30 template<typename InputIterator, typename Predicate>
  31 bool any_of ( InputIterator first, InputIterator last, Predicate p )
  32 {
  33     for ( ; first != last; ++first )
  34         if ( p(*first))
  35             return true;
  36     return false;
  37 }
  38
  39 /// \fn any_of ( const Range &r, Predicate p )
  40 /// \return true if any elements in the range satisfy the predicate 'p'
  41 /// \note returns false on an empty range
  42 ///
  43 /// \param r    The input range
  44 /// \param p    A predicate for testing the elements of the range
  45 ///
  46 template<typename Range, typename Predicate>
  47 bool any_of ( const Range &r, Predicate p )
  48 {
  49     return boost::algorithm::any_of (boost::begin (r), boost::end (r), p);
  50 }
  51
  52 /// \fn any_of_equal ( InputIterator first, InputIterator last, const V &val )
  53 /// \return true if any of the elements in [first, last) are equal to 'val'
  54 /// \note returns false on an empty range
  55 ///
  56 /// \param first The start of the input sequence
  57 /// \param last  One past the end of the input sequence
  58 /// \param val   A value to compare against
  59 ///
  60 template<typename InputIterator, typename V>
  61 bool any_of_equal ( InputIterator first, InputIterator last, const V &val )
  62 {
  63     for ( ; first != last; ++first )
  64         if ( val == *first )
  65             return true;
  66     return false;
  67 }
  68
  69 /// \fn any_of_equal ( const Range &r, const V &val )
  70 /// \return true if any of the elements in the range are equal to 'val'
  71 /// \note returns false on an empty range
  72 ///
  73 /// \param r     The input range
  74 /// \param val   A value to compare against
  75 ///
  76 template<typename Range, typename V>
  77 bool any_of_equal ( const Range &r, const V &val )
  78 {
  79     return boost::algorithm::any_of_equal (boost::begin (r), boost::end (r), val);
  80 }
  81
  82 }} // namespace boost and algorithm
  83
  84 #endif // BOOST_ALGORITHM_ANY_OF_HPP