1 | // Boost.Range library |
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2 | // |
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3 | // Copyright Neil Groves 2008. Use, modification and |
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4 | // distribution is subject to the Boost Software Licence, Version |
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5 | // 1.0. (See accompanying file LICENSE_1_0.txt or copy at |
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6 | // http://www.boost.org/LICENSE_1_0.txt |
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7 | // |
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8 | // For more information, see http://www.boost.org/libs/range |
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9 | // |
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10 | |
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11 | #ifndef BOOST_RANGE_COUNTING_RANGE_HPP_INCLUDED |
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12 | #define BOOST_RANGE_COUNTING_RANGE_HPP_INCLUDED |
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13 | |
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14 | #include <boost/config.hpp> |
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15 | #if BOOST_MSVC >= 1400 |
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16 | #pragma warning(push) |
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17 | #pragma warning(disable : 4244) |
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18 | #endif |
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19 | |
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20 | #include <boost/range/iterator_range_core.hpp> |
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21 | #include <boost/range/value_type.hpp> |
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22 | #include <boost/iterator/counting_iterator.hpp> |
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23 | #include <boost/utility.hpp> |
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24 | |
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25 | namespace boost |
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26 | { |
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27 | |
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28 | template<class Value> |
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29 | inline iterator_range<counting_iterator<Value> > |
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30 | counting_range(Value first, Value last) |
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31 | { |
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32 | typedef counting_iterator<Value> counting_iterator_t; |
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33 | typedef iterator_range<counting_iterator_t> result_t; |
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34 | return result_t(counting_iterator_t(first), |
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35 | counting_iterator_t(last)); |
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36 | } |
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37 | |
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38 | template<class Range> |
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39 | inline iterator_range<counting_iterator<BOOST_DEDUCED_TYPENAME range_value<const Range>::type> > |
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40 | counting_range(const Range& rng) |
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41 | { |
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42 | typedef counting_iterator<BOOST_DEDUCED_TYPENAME range_value<const Range>::type> counting_iterator_t; |
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43 | typedef iterator_range<counting_iterator_t> result_t; |
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44 | return boost::empty(rng) |
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45 | ? result_t() |
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46 | : result_t( |
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47 | counting_iterator_t(*boost::begin(rng)), |
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48 | counting_iterator_t(*boost::prior(boost::end(rng)))); |
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49 | } |
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50 | |
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51 | template<class Range> |
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52 | inline iterator_range<counting_iterator<BOOST_DEDUCED_TYPENAME range_value<Range>::type> > |
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53 | counting_range(Range& rng) |
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54 | { |
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55 | typedef counting_iterator<BOOST_DEDUCED_TYPENAME range_value<Range>::type> counting_iterator_t; |
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56 | typedef iterator_range<counting_iterator_t> result_t; |
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57 | return boost::empty(rng) |
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58 | ? result_t() |
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59 | : result_t( |
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60 | counting_iterator_t(*boost::begin(rng)), |
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61 | counting_iterator_t(*boost::prior(boost::end(rng)))); |
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62 | } |
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63 | } // namespace boost |
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64 | |
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65 | #if BOOST_MSVC >= 1400 |
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66 | #pragma warning(pop) |
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67 | #endif |
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68 | |
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69 | #endif // include guard |
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