boost/mpl/aux_/has_rebind.hpp

   1
   2 #ifndef BOOST_MPL_AUX_HAS_REBIND_HPP_INCLUDED
   3 #define BOOST_MPL_AUX_HAS_REBIND_HPP_INCLUDED
   4
   5 // Copyright Aleksey Gurtovoy 2002-2004
   6 //
   7 // Distributed under the Boost Software License, Version 1.0.
   8 // (See accompanying file LICENSE_1_0.txt or copy at
   9 // http://www.boost.org/LICENSE_1_0.txt)
  10 //
  11 // See http://www.boost.org/libs/mpl for documentation.
  12
  13 // $Id: has_rebind.hpp 49267 2008-10-11 06:19:02Z agurtovoy $
  14 // $Date: 2008-10-10 23:19:02 -0700 (Fri, 10 Oct 2008) $
  15 // $Revision: 49267 $
  16
  17 #include <boost/mpl/aux_/config/msvc.hpp>
  18 #include <boost/mpl/aux_/config/intel.hpp>
  19 #include <boost/mpl/aux_/config/workaround.hpp>
  20
  21 #if BOOST_WORKAROUND(__EDG_VERSION__, <= 244) && !defined(BOOST_INTEL_CXX_VERSION)
  22 #   include <boost/mpl/has_xxx.hpp>
  23 #elif BOOST_WORKAROUND(BOOST_MSVC, < 1300)
  24 #   include <boost/mpl/has_xxx.hpp>
  25 #   include <boost/mpl/if.hpp>
  26 #   include <boost/mpl/bool.hpp>
  27 #   include <boost/mpl/aux_/msvc_is_class.hpp>
  28 #elif BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x610))
  29 #   include <boost/mpl/if.hpp>
  30 #   include <boost/mpl/bool.hpp>
  31 #   include <boost/mpl/aux_/yes_no.hpp>
  32 #   include <boost/mpl/aux_/config/static_constant.hpp>
  33 #   include <boost/type_traits/is_class.hpp>
  34 #else
  35 #   include <boost/mpl/aux_/type_wrapper.hpp>
  36 #   include <boost/mpl/aux_/yes_no.hpp>
  37 #   include <boost/mpl/aux_/config/static_constant.hpp>
  38 #endif
  39
  40 namespace boost { namespace mpl { namespace aux {
  41
  42 #if BOOST_WORKAROUND(__EDG_VERSION__, <= 244) && !defined(BOOST_INTEL_CXX_VERSION)
  43
  44 BOOST_MPL_HAS_XXX_TRAIT_NAMED_DEF(has_rebind, rebind, false)
  45
  46 #elif BOOST_WORKAROUND(BOOST_MSVC, < 1300)
  47
  48 BOOST_MPL_HAS_XXX_TRAIT_NAMED_DEF(has_rebind_impl, rebind, false)
  49
  50 template< typename T >
  51 struct has_rebind
  52     : if_<
  53           msvc_is_class<T>
  54         , has_rebind_impl<T>
  55         , bool_<false>
  56         >::type
  57 {
  58 };
  59
  60 #else // the rest
  61
  62 template< typename T > struct has_rebind_tag {};
  63 no_tag operator|(has_rebind_tag<int>, void const volatile*);
  64
  65 #   if !BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x610))
  66 template< typename T >
  67 struct has_rebind
  68 {
  69     static has_rebind_tag<T>* get();
  70     BOOST_STATIC_CONSTANT(bool, value =
  71           sizeof(has_rebind_tag<int>() | get()) == sizeof(yes_tag)
  72         );
  73 };
  74 #   else // __BORLANDC__
  75 template< typename T >
  76 struct has_rebind_impl
  77 {
  78     static T* get();
  79     BOOST_STATIC_CONSTANT(bool, value =
  80           sizeof(has_rebind_tag<int>() | get()) == sizeof(yes_tag)
  81         );
  82 };
  83
  84 template< typename T >
  85 struct has_rebind
  86     : if_<
  87           is_class<T>
  88         , has_rebind_impl<T>
  89         , bool_<false>
  90         >::type
  91 {
  92 };
  93 #   endif // __BORLANDC__
  94
  95 #endif
  96
  97 }}}
  98
  99 #endif // BOOST_MPL_AUX_HAS_REBIND_HPP_INCLUDED