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1 | // Copyright David Abrahams 2006. 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_CONCEPT_USAGE_DWA2006919_HPP |
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5 | # define BOOST_CONCEPT_USAGE_DWA2006919_HPP |
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6 | |
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7 | # include <boost/concept/assert.hpp> |
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8 | # include <boost/detail/workaround.hpp> |
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9 | # include <boost/concept/detail/backward_compatibility.hpp> |
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10 | |
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11 | namespace boost { namespace concepts { |
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12 | |
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13 | # if BOOST_WORKAROUND(__GNUC__, == 2) |
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14 | |
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15 | # define BOOST_CONCEPT_USAGE(model) ~model() |
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16 | |
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17 | # else |
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18 | |
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19 | template <class Model> |
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20 | struct usage_requirements |
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21 | { |
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22 | ~usage_requirements() { ((Model*)0)->~Model(); } |
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23 | }; |
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24 | |
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25 | # if BOOST_WORKAROUND(__GNUC__, <= 3) |
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26 | |
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27 | # define BOOST_CONCEPT_USAGE(model) \ |
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28 | model(); /* at least 2.96 and 3.4.3 both need this :( */ \ |
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29 | BOOST_CONCEPT_ASSERT((boost::concepts::usage_requirements<model>)); \ |
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30 | ~model() |
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31 | |
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32 | # else |
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33 | |
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34 | # define BOOST_CONCEPT_USAGE(model) \ |
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35 | BOOST_CONCEPT_ASSERT((boost::concepts::usage_requirements<model>)); \ |
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36 | ~model() |
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37 | |
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38 | # endif |
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39 | |
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40 | # endif |
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41 | |
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42 | }} // namespace boost::concepts |
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43 | |
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44 | #endif // BOOST_CONCEPT_USAGE_DWA2006919_HPP |
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