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      1 
      2 #ifndef BOOST_MPL_AUX_VALUE_WKND_HPP_INCLUDED
      3 #define BOOST_MPL_AUX_VALUE_WKND_HPP_INCLUDED
      4 
      5 // Copyright Aleksey Gurtovoy 2000-2004
      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: value_wknd.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_/static_cast.hpp>
     18 #include <boost/mpl/aux_/config/integral.hpp>
     19 #include <boost/mpl/aux_/config/eti.hpp>
     20 #include <boost/mpl/aux_/config/workaround.hpp>
     21 
     22 #if defined(BOOST_MPL_CFG_BCC_INTEGRAL_CONSTANTS) \
     23     || defined(BOOST_MPL_CFG_MSVC_60_ETI_BUG)
     24 
     25 #   include <boost/mpl/int.hpp>
     26 
     27 namespace boost { namespace mpl { namespace aux {
     28 template< typename C_ > struct value_wknd
     29     : C_
     30 {
     31 };
     32 
     33 #if defined(BOOST_MPL_CFG_MSVC_60_ETI_BUG)
     34 template<> struct value_wknd<int>
     35     : int_<1>
     36 {
     37     using int_<1>::value;
     38 };
     39 #endif
     40 }}}
     41 
     42 
     43 #if !defined(BOOST_MPL_CFG_MSVC_60_ETI_BUG)
     44 #   define BOOST_MPL_AUX_VALUE_WKND(C) \
     45     ::BOOST_MPL_AUX_ADL_BARRIER_NAMESPACE::aux::value_wknd< C > \
     46 /**/
     47 #    define BOOST_MPL_AUX_MSVC_VALUE_WKND(C) BOOST_MPL_AUX_VALUE_WKND(C)
     48 #else
     49 #   define BOOST_MPL_AUX_VALUE_WKND(C) C
     50 #   define BOOST_MPL_AUX_MSVC_VALUE_WKND(C) \
     51     ::boost::mpl::aux::value_wknd< C > \
     52 /**/
     53 #endif
     54 
     55 #else // BOOST_MPL_CFG_BCC_INTEGRAL_CONSTANTS
     56 
     57 #   define BOOST_MPL_AUX_VALUE_WKND(C) C
     58 #   define BOOST_MPL_AUX_MSVC_VALUE_WKND(C) C
     59 
     60 #endif
     61 
     62 #if BOOST_WORKAROUND(__EDG_VERSION__, <= 238)
     63 #   define BOOST_MPL_AUX_NESTED_VALUE_WKND(T, C) \
     64     BOOST_MPL_AUX_STATIC_CAST(T, C::value) \
     65 /**/
     66 #else
     67 #   define BOOST_MPL_AUX_NESTED_VALUE_WKND(T, C) \
     68     BOOST_MPL_AUX_VALUE_WKND(C)::value \
     69 /**/
     70 #endif
     71 
     72 
     73 namespace boost { namespace mpl { namespace aux {
     74 
     75 template< typename T > struct value_type_wknd
     76 {
     77     typedef typename T::value_type type;
     78 };
     79 
     80 #if defined(BOOST_MPL_CFG_MSVC_ETI_BUG)
     81 template<> struct value_type_wknd<int>
     82 {
     83     typedef int type;
     84 };
     85 #endif
     86 
     87 }}}
     88 
     89 #endif // BOOST_MPL_AUX_VALUE_WKND_HPP_INCLUDED
     90