1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/os/ossrv/ossrv_pub/boost_apis/boost/mpl/if.hpp	Fri Jun 15 03:10:57 2012 +0200
     1.3 @@ -0,0 +1,135 @@
     1.4 +
     1.5 +#ifndef BOOST_MPL_IF_HPP_INCLUDED
     1.6 +#define BOOST_MPL_IF_HPP_INCLUDED
     1.7 +
     1.8 +// Copyright Aleksey Gurtovoy 2000-2004
     1.9 +//
    1.10 +// Distributed under the Boost Software License, Version 1.0. 
    1.11 +// (See accompanying file LICENSE_1_0.txt or copy at 
    1.12 +// http://www.boost.org/LICENSE_1_0.txt)
    1.13 +//
    1.14 +// See http://www.boost.org/libs/mpl for documentation.
    1.15 +
    1.16 +// $Source: /cvsroot/boost/boost/boost/mpl/if.hpp,v $
    1.17 +// $Date: 2004/09/07 08:51:31 $
    1.18 +// $Revision: 1.25 $
    1.19 +
    1.20 +#include <boost/mpl/aux_/value_wknd.hpp>
    1.21 +#include <boost/mpl/aux_/static_cast.hpp>
    1.22 +#include <boost/mpl/aux_/na_spec.hpp>
    1.23 +#include <boost/mpl/aux_/lambda_support.hpp>
    1.24 +#include <boost/mpl/aux_/config/integral.hpp>
    1.25 +#include <boost/mpl/aux_/config/ctps.hpp>
    1.26 +#include <boost/mpl/aux_/config/workaround.hpp>
    1.27 +
    1.28 +namespace boost { namespace mpl {
    1.29 +
    1.30 +#if !defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION)
    1.31 +
    1.32 +template<
    1.33 +      bool C
    1.34 +    , typename T1
    1.35 +    , typename T2
    1.36 +    >
    1.37 +struct if_c
    1.38 +{
    1.39 +    typedef T1 type;
    1.40 +};
    1.41 +
    1.42 +template<
    1.43 +      typename T1
    1.44 +    , typename T2
    1.45 +    >
    1.46 +struct if_c<false,T1,T2>
    1.47 +{
    1.48 +    typedef T2 type;
    1.49 +};
    1.50 +
    1.51 +// agurt, 05/sep/04: nondescriptive parameter names for the sake of DigitalMars
    1.52 +// (and possibly MWCW < 8.0); see http://article.gmane.org/gmane.comp.lib.boost.devel/108959
    1.53 +template<
    1.54 +      typename BOOST_MPL_AUX_NA_PARAM(T1)
    1.55 +    , typename BOOST_MPL_AUX_NA_PARAM(T2)
    1.56 +    , typename BOOST_MPL_AUX_NA_PARAM(T3)
    1.57 +    >
    1.58 +struct if_
    1.59 +{
    1.60 + private:
    1.61 +    // agurt, 02/jan/03: two-step 'type' definition for the sake of aCC 
    1.62 +    typedef if_c<
    1.63 +#if defined(BOOST_MPL_CFG_BCC_INTEGRAL_CONSTANTS)
    1.64 +          BOOST_MPL_AUX_VALUE_WKND(T1)::value
    1.65 +#else
    1.66 +          BOOST_MPL_AUX_STATIC_CAST(bool, BOOST_MPL_AUX_VALUE_WKND(T1)::value)
    1.67 +#endif
    1.68 +        , T2
    1.69 +        , T3
    1.70 +        > almost_type_;
    1.71 + 
    1.72 + public:
    1.73 +    typedef typename almost_type_::type type;
    1.74 +    
    1.75 +    BOOST_MPL_AUX_LAMBDA_SUPPORT(3,if_,(T1,T2,T3))
    1.76 +};
    1.77 +
    1.78 +#else
    1.79 +
    1.80 +// no partial class template specialization
    1.81 +
    1.82 +namespace aux {
    1.83 +
    1.84 +template< bool C >
    1.85 +struct if_impl
    1.86 +{
    1.87 +    template< typename T1, typename T2 > struct result_
    1.88 +    {
    1.89 +        typedef T1 type;
    1.90 +    };
    1.91 +};
    1.92 +
    1.93 +template<>
    1.94 +struct if_impl<false>
    1.95 +{
    1.96 +    template< typename T1, typename T2 > struct result_
    1.97 +    { 
    1.98 +        typedef T2 type;
    1.99 +    };
   1.100 +};
   1.101 +
   1.102 +} // namespace aux
   1.103 +
   1.104 +template<
   1.105 +      bool C_
   1.106 +    , typename T1
   1.107 +    , typename T2
   1.108 +    >
   1.109 +struct if_c
   1.110 +{
   1.111 +    typedef typename aux::if_impl< C_ >
   1.112 +        ::template result_<T1,T2>::type type;
   1.113 +};
   1.114 +
   1.115 +// (almost) copy & paste in order to save one more 
   1.116 +// recursively nested template instantiation to user
   1.117 +template<
   1.118 +      typename BOOST_MPL_AUX_NA_PARAM(C_)
   1.119 +    , typename BOOST_MPL_AUX_NA_PARAM(T1)
   1.120 +    , typename BOOST_MPL_AUX_NA_PARAM(T2)
   1.121 +    >
   1.122 +struct if_
   1.123 +{
   1.124 +    enum { msvc_wknd_ = BOOST_MPL_AUX_MSVC_VALUE_WKND(C_)::value };
   1.125 +
   1.126 +    typedef typename aux::if_impl< BOOST_MPL_AUX_STATIC_CAST(bool, msvc_wknd_) >
   1.127 +        ::template result_<T1,T2>::type type;
   1.128 +
   1.129 +    BOOST_MPL_AUX_LAMBDA_SUPPORT(3,if_,(C_,T1,T2))
   1.130 +};
   1.131 +
   1.132 +#endif // BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
   1.133 +
   1.134 +BOOST_MPL_AUX_NA_SPEC(3, if_)
   1.135 +
   1.136 +}}
   1.137 +
   1.138 +#endif // BOOST_MPL_IF_HPP_INCLUDED