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