| 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/config/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 | template <class Model> |
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| 14 | struct usage_requirements |
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| 15 | { |
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| 16 | ~usage_requirements() { ((Model*)0)->~Model(); } |
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| 17 | }; |
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| 18 | |
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| 19 | # if BOOST_WORKAROUND(__GNUC__, <= 3) |
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| 20 | |
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| 21 | # define BOOST_CONCEPT_USAGE(model) \ |
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| 22 | model(); /* at least 2.96 and 3.4.3 both need this :( */ \ |
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| 23 | BOOST_CONCEPT_ASSERT((boost::concepts::usage_requirements<model>)); \ |
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| 24 | ~model() |
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| 25 | |
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| 26 | # else |
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| 27 | |
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| 28 | # define BOOST_CONCEPT_USAGE(model) \ |
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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 | # endif |
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| 33 | |
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| 34 | }} // namespace boost::concepts |
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| 35 | |
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| 36 | #endif // BOOST_CONCEPT_USAGE_DWA2006919_HPP |
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| 37 | |
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