Updated boost to v1.55.0

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

diff --git a/boost/numeric/conversion/detail/int_float_mixture.hpp b/boost/numeric/conversion/detail/int_float_mixture.hpp
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+++ b/boost/numeric/conversion/detail/int_float_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_INT_FLOAT_MIXTURE_FLC_12NOV2002_HPP
+#define BOOST_NUMERIC_CONVERSION_DETAIL_INT_FLOAT_MIXTURE_FLC_12NOV2002_HPP
+
+#include "boost/config.hpp"
+#include "boost/limits.hpp"
+
+#include "boost/numeric/conversion/int_float_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 'IntFloatMixture'
+  typedef mpl::integral_c<int_float_mixture_enum, integral_to_integral> int2int_c ;
+  typedef mpl::integral_c<int_float_mixture_enum, integral_to_float>    int2float_c ;
+  typedef mpl::integral_c<int_float_mixture_enum, float_to_integral>    float2int_c ;
+  typedef mpl::integral_c<int_float_mixture_enum, float_to_float>       float2float_c ;
+
+  // Metafunction:
+  //
+  //   get_int_float_mixture<T,S>::type
+  //
+  // Selects the appropriate Int-Float Mixture Integral Constant for the combination T,S.
+  //
+  template<class T,class S>
+  struct get_int_float_mixture
+  {
+    typedef mpl::bool_< ::std::numeric_limits<S>::is_integer > S_int ;
+    typedef mpl::bool_< ::std::numeric_limits<T>::is_integer > T_int ;
+
+    typedef typename
+      for_both<S_int, T_int, int2int_c, int2float_c, float2int_c, float2float_c>::type
+        type ;
+  } ;
+
+  // Metafunction:
+  //
+  //   for_int_float_mixture<Mixture,int_int,int_float,float_int,float_float>::type
+  //
+  // {Mixture} is one of the Integral Constants for Mixture, declared above.
+  // {int_int,int_float,float_int,float_float} are aribtrary types. (not metafunctions)
+  //
+  // According to the value of 'IntFloatMixture', selects the corresponding type.
+  //
+  template<class IntFloatMixture, class Int2Int, class Int2Float, class Float2Int, class Float2Float>
+  struct for_int_float_mixture
+  {
+    typedef typename
+      ct_switch4<IntFloatMixture
+                 ,int2int_c, int2float_c, float2int_c  // default
+                 ,Int2Int  , Int2Float  , Float2Int  , Float2Float
+                >::type
+        type ;
+  } ;
+
+} } } // namespace boost::numeric::convdetail
+
+#endif
+//
+///////////////////////////////////////////////////////////////////////////////////////////////
+
+