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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 <boost/range/begin.hpp>
16#include <boost/range/end.hpp>
17
18namespace boost { namespace algorithm {
19
20/// \fn none_of ( InputIterator first, InputIterator last, Predicate p )
21/// \return true if none of the elements in [first, last) satisfy the predicate 'p'
22/// \note returns true on an empty range
23///
24/// \param first The start of the input sequence
25/// \param last One past the end of the input sequence
26/// \param p A predicate for testing the elements of the sequence
27///
28template<typename InputIterator, typename Predicate>
29bool none_of ( InputIterator first, InputIterator last, Predicate p )
30{
31 for ( ; first != last; ++first )
32 if ( p(*first))
33 return false;
34 return true;
35}
36
37/// \fn none_of ( const Range &r, Predicate p )
38/// \return true if none of the elements in the range satisfy the predicate 'p'
39/// \note returns true on an empty range
40///
41/// \param r The input range
42/// \param p A predicate for testing the elements of the range
43///
44template<typename Range, typename Predicate>
45bool none_of ( const Range &r, Predicate p )
46{
47 return boost::algorithm::none_of (boost::begin (r), boost::end (r), p );
48}
49
50/// \fn none_of_equal ( InputIterator first, InputIterator last, const V &val )
51/// \return true if none of the elements in [first, last) are equal to 'val'
52/// \note returns true on an empty range
53///
54/// \param first The start of the input sequence
55/// \param last One past the end of the input sequence
56/// \param val A value to compare against
57///
58template<typename InputIterator, typename V>
59bool none_of_equal ( InputIterator first, InputIterator last, const V &val )
60{
61 for ( ; first != last; ++first )
62 if ( val == *first )
63 return false;
64 return true;
65}
66
67/// \fn none_of_equal ( const Range &r, const V &val )
68/// \return true if none of the elements in the range are equal to 'val'
69/// \note returns true on an empty range
70///
71/// \param r The input range
72/// \param val A value to compare against
73///
74template<typename Range, typename V>
75bool none_of_equal ( const Range &r, const V & val )
76{
77 return boost::algorithm::none_of_equal (boost::begin (r), boost::end (r), val);
78}
79
80}} // namespace boost and algorithm
81
82#endif // BOOST_ALGORITHM_NONE_OF_HPP