Updated boost to v1.55.0

[rsem.git] / boost / numeric / conversion / detail / udt_builtin_mixture.hpp

diff --git a/boost/numeric/conversion/detail/udt_builtin_mixture.hpp b/boost/numeric/conversion/detail/udt_builtin_mixture.hpp
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+++ b/boost/numeric/conversion/detail/udt_builtin_mixture.hpp
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+//  (c) Copyright Fernando Luis Cacciola Carballal 2000-2004
+//  Use, modification, and distribution is subject to the Boost Software
+//  License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
+//  http://www.boost.org/LICENSE_1_0.txt)
+
+//  See library home page at http://www.boost.org/libs/numeric/conversion
+//
+// Contact the author at: fernando_cacciola@hotmail.com
+// 
+#ifndef BOOST_NUMERIC_CONVERSION_DETAIL_UDT_BUILTIN_MIXTURE_FLC_12NOV2002_HPP
+#define BOOST_NUMERIC_CONVERSION_DETAIL_UDT_BUILTIN_MIXTURE_FLC_12NOV2002_HPP
+
+#include "boost/type_traits/is_arithmetic.hpp"
+
+#include "boost/numeric/conversion/udt_builtin_mixture_enum.hpp"
+#include "boost/numeric/conversion/detail/meta.hpp"
+
+#include "boost/mpl/integral_c.hpp"
+
+namespace boost { namespace numeric { namespace convdetail
+{
+  // Integral Constants for 'UdtMixture'
+  typedef mpl::integral_c<udt_builtin_mixture_enum, builtin_to_builtin> builtin2builtin_c ;
+  typedef mpl::integral_c<udt_builtin_mixture_enum, builtin_to_udt>     builtin2udt_c ;
+  typedef mpl::integral_c<udt_builtin_mixture_enum, udt_to_builtin>     udt2builtin_c ;
+  typedef mpl::integral_c<udt_builtin_mixture_enum, udt_to_udt>         udt2udt_c ;
+
+  // Metafunction:
+  //
+  //   for_udt_mixture<UdtMixture,BuiltIn2BuiltIn,BuiltIn2Udt,Udt2BuiltIn,Udt2Udt>::type
+  //
+  // {UdtMixture} is one of the Integral Constants for UdMixture, declared above.
+  // {BuiltIn2BuiltIn,BuiltIn2Udt,Udt2BuiltIn,Udt2Udt} are aribtrary types. (not metafunctions)
+  //
+  // According to the value of 'UdtMixture', selects the corresponding type.
+  //
+  template<class UdtMixture, class BuiltIn2BuiltIn, class BuiltIn2Udt, class Udt2BuiltIn, class Udt2Udt>
+  struct for_udt_builtin_mixture
+  {
+    typedef typename
+      ct_switch4<UdtMixture
+                 , builtin2builtin_c, builtin2udt_c, udt2builtin_c // default
+                 , BuiltIn2BuiltIn  , BuiltIn2Udt  , Udt2BuiltIn  , Udt2Udt
+                >::type
+        type ;
+  } ;
+
+  // Metafunction:
+  //
+  //   get_udt_mixture<T,S>::type
+  //
+  // Selects the appropriate UdtMixture Integral Constant for the combination T,S.
+  //
+  template<class T,class S>
+  struct get_udt_builtin_mixture
+  {
+    typedef is_arithmetic<S> S_builtin ;
+    typedef is_arithmetic<T> T_builtin ;
+
+    typedef typename
+      for_both<S_builtin, T_builtin, builtin2builtin_c, builtin2udt_c, udt2builtin_c, udt2udt_c>::type
+        type ;
+  } ;
+
+} } } // namespace boost::numeric::convdetail
+
+#endif
+
+