1 | // Copyright Neil Groves 2009. Use, modification and |
2 | // distribution is subject to the Boost Software License, Version |
3 | // 1.0. (See accompanying file LICENSE_1_0.txt or copy at |
4 | // http://www.boost.org/LICENSE_1_0.txt) |
5 | // |
6 | // |
7 | // For more information, see http://www.boost.org/libs/range/ |
8 | // |
9 | #ifndef BOOST_RANGE_ALGORITHM_COUNT_HPP_INCLUDED |
10 | #define BOOST_RANGE_ALGORITHM_COUNT_HPP_INCLUDED |
11 | |
12 | #include <boost/concept_check.hpp> |
13 | #include <boost/range/begin.hpp> |
14 | #include <boost/range/end.hpp> |
15 | #include <boost/range/concepts.hpp> |
16 | #include <boost/range/difference_type.hpp> |
17 | #include <algorithm> |
18 | |
19 | namespace boost |
20 | { |
21 | namespace range |
22 | { |
23 | |
24 | /// \brief template function count |
25 | /// |
26 | /// range-based version of the count std algorithm |
27 | /// |
28 | /// \pre SinglePassRange is a model of the SinglePassRangeConcept |
29 | template< class SinglePassRange, class Value > |
30 | inline BOOST_DEDUCED_TYPENAME range_difference<SinglePassRange>::type |
31 | count(SinglePassRange& rng, const Value& val) |
32 | { |
33 | BOOST_RANGE_CONCEPT_ASSERT(( SinglePassRangeConcept<SinglePassRange> )); |
34 | return std::count(boost::begin(rng), boost::end(rng), val); |
35 | } |
36 | |
37 | /// \overload |
38 | template< class SinglePassRange, class Value > |
39 | inline BOOST_DEDUCED_TYPENAME range_difference<SinglePassRange const>::type |
40 | count(const SinglePassRange& rng, const Value& val) |
41 | { |
42 | BOOST_RANGE_CONCEPT_ASSERT(( SinglePassRangeConcept<const SinglePassRange> )); |
43 | return std::count(boost::begin(rng), boost::end(rng), val); |
44 | } |
45 | |
46 | } // namespace range |
47 | using range::count; |
48 | } // namespace boost |
49 | |
50 | #endif // include guard |
51 | |