ceph/src/boost/boost/concept/usage.hpp

   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 template <class Model>
  14 struct usage_requirements
  15 {
  16     ~usage_requirements() { ((Model*)0)->~Model(); }
  17 };
  18
  19 #  if BOOST_WORKAROUND(__GNUC__, <= 3)
  20
  21 #   define BOOST_CONCEPT_USAGE(model)                                    \
  22       model(); /* at least 2.96 and 3.4.3 both need this :( */           \
  23       BOOST_CONCEPT_ASSERT((boost::concepts::usage_requirements<model>)); \
  24       ~model()
  25
  26 #  else
  27
  28 #   define BOOST_CONCEPT_USAGE(model)                                    \
  29       BOOST_CONCEPT_ASSERT((boost::concepts::usage_requirements<model>)); \
  30       ~model()
  31
  32 #  endif
  33
  34 }} // namespace boost::concepts
  35
  36 #endif // BOOST_CONCEPT_USAGE_DWA2006919_HPP