Last change
on this file since 29 was
29,
checked in by landauf, 16 years ago
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updated boost from 1_33_1 to 1_34_1
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File size:
997 bytes
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1 | // Boost.Signals library |
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2 | |
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3 | // Copyright Douglas Gregor 2001-2003. Use, modification and |
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4 | // distribution is subject to the Boost Software License, 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 |
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9 | |
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10 | #include <algorithm> |
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11 | #include <iostream> |
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12 | #include <boost/signals/signal2.hpp> |
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13 | |
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14 | template<typename T> |
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15 | struct maximum { |
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16 | typedef T result_type; |
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17 | |
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18 | template<typename InputIterator> |
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19 | T operator()(InputIterator first, InputIterator last) const |
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20 | { |
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21 | if (first == last) |
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22 | throw std::runtime_error("Cannot compute maximum of zero elements!"); |
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23 | return *std::max_element(first, last); |
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24 | } |
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25 | }; |
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26 | |
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27 | int main() |
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28 | { |
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29 | boost::signal2<int, int, int, maximum<int> > sig_max; |
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30 | sig_max.connect(std::plus<int>()); |
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31 | sig_max.connect(std::multiplies<int>()); |
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32 | sig_max.connect(std::minus<int>()); |
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33 | sig_max.connect(std::divides<int>()); |
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34 | |
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35 | std::cout << sig_max(5, 3) << std::endl; // prints 15 |
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36 | |
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37 | return 0; |
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38 | } |
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