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>
any_of(InputIterator first,InputIterator last,Predicate p)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>
any_of(const Range & r,Predicate p)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>
any_of_equal(InputIterator first,InputIterator last,const V & val)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>
any_of_equal(const Range & r,const V & val)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
86