ceph/src/boost/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/config.hpp>
  18 #include <boost/range/begin.hpp>
  19 #include <boost/range/end.hpp>
  20
  21 namespace boost { namespace algorithm {
  22
  23 /// \fn any_of ( InputIterator first, InputIterator last, Predicate p )
  24 /// \return true if any of the elements in [first, last) satisfy the predicate
  25 /// \note returns false on an empty range
  26 ///
  27 /// \param first The start of the input sequence
  28 /// \param last  One past the end of the input sequence
  29 /// \param p     A predicate for testing the elements of the sequence
  30 ///
  31 template<typename InputIterator, typename Predicate>
  32 BOOST_CXX14_CONSTEXPR bool any_of ( InputIterator first, InputIterator last, Predicate p )
  33 {
  34     for ( ; first != last; ++first )
  35         if ( p(*first))
  36             return true;
  37     return false;
  38 }
  39
  40 /// \fn any_of ( const Range &r, Predicate p )
  41 /// \return true if any elements in the range satisfy the predicate 'p'
  42 /// \note returns false on an empty range
  43 ///
  44 /// \param r    The input range
  45 /// \param p    A predicate for testing the elements of the range
  46 ///
  47 template<typename Range, typename Predicate>
  48 BOOST_CXX14_CONSTEXPR bool any_of ( const Range &r, Predicate p )
  49 {
  50     return boost::algorithm::any_of (boost::begin (r), boost::end (r), p);
  51 }
  52
  53 /// \fn any_of_equal ( InputIterator first, InputIterator last, const V &val )
  54 /// \return true if any of the elements in [first, last) are equal to 'val'
  55 /// \note returns false on an empty range
  56 ///
  57 /// \param first The start of the input sequence
  58 /// \param last  One past the end of the input sequence
  59 /// \param val   A value to compare against
  60 ///
  61 template<typename InputIterator, typename V>
  62 BOOST_CXX14_CONSTEXPR bool any_of_equal ( InputIterator first, InputIterator last, const V &val )
  63 {
  64     for ( ; first != last; ++first )
  65         if ( val == *first )
  66             return true;
  67     return false;
  68 }
  69
  70 /// \fn any_of_equal ( const Range &r, const V &val )
  71 /// \return true if any of the elements in the range are equal to 'val'
  72 /// \note returns false on an empty range
  73 ///
  74 /// \param r     The input range
  75 /// \param val   A value to compare against
  76 ///
  77 template<typename Range, typename V>
  78 BOOST_CXX14_CONSTEXPR bool any_of_equal ( const Range &r, const V &val )
  79 {
  80     return boost::algorithm::any_of_equal (boost::begin (r), boost::end (r), val);
  81 }
  82
  83 }} // namespace boost and algorithm
  84
  85 #endif // BOOST_ALGORITHM_ANY_OF_HPP