1 // Copyright David Abrahams 2006. Distributed under the Boost 2 // Software License, Version 1.0. (See accompanying 3 // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) 4 #ifndef BOOST_CONCEPT_USAGE_DWA2006919_HPP 5 # define BOOST_CONCEPT_USAGE_DWA2006919_HPP 6 7 # include <boost/concept/assert.hpp> 8 # include <boost/detail/workaround.hpp> 9 # include <boost/concept/detail/backward_compatibility.hpp> 10 11 namespace boost { namespace concepts { 12 13 # if BOOST_WORKAROUND(__GNUC__, == 2) 14 15 # define BOOST_CONCEPT_USAGE(model) ~model() 16 17 # else 18 19 template <class Model> 20 struct usage_requirements 21 { 22 ~usage_requirements() { ((Model*)0)->~Model(); } 23 }; 24 25 # if BOOST_WORKAROUND(__GNUC__, <= 3) 26 27 # define BOOST_CONCEPT_USAGE(model) \ 28 model(); /* at least 2.96 and 3.4.3 both need this :( */ \ 29 BOOST_CONCEPT_ASSERT((boost::concepts::usage_requirements<model>)); \ 30 ~model() 31 32 # else 33 34 # define BOOST_CONCEPT_USAGE(model) \ 35 BOOST_CONCEPT_ASSERT((boost::concepts::usage_requirements<model>)); \ 36 ~model() 37 38 # endif 39 40 # endif 41 42 }} // namespace boost::concepts 43 44 #endif // BOOST_CONCEPT_USAGE_DWA2006919_HPP 45
