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1 // Copyright David Abrahams 2005. Distributed under the Boost |
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2 // Software License, Version 1.0. (See accompanying |
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3 // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) |
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4 #ifndef BOOST_PARAMETER_AUX_RESULT_OF0_DWA2005511_HPP |
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5 # define BOOST_PARAMETER_AUX_RESULT_OF0_DWA2005511_HPP |
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6 |
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7 # include <boost/utility/result_of.hpp> |
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8 |
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9 // A metafunction returning the result of invoking a nullary function |
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10 // object of the given type. |
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11 |
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12 #ifndef BOOST_NO_RESULT_OF |
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13 |
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14 # include <boost/utility/result_of.hpp> |
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15 namespace boost { namespace parameter { namespace aux { |
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16 template <class F> |
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17 struct result_of0 : result_of<F()> |
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18 {}; |
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19 |
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20 }}} // namespace boost::parameter::aux_ |
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21 |
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22 #else |
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23 |
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24 namespace boost { namespace parameter { namespace aux { |
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25 template <class F> |
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26 struct result_of0 |
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27 { |
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28 typedef typename F::result_type type; |
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29 }; |
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30 |
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31 }}} // namespace boost::parameter::aux_ |
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32 |
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33 #endif |
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34 |
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35 |
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36 #endif // BOOST_PARAMETER_AUX_RESULT_OF0_DWA2005511_HPP |