comparison DEPENDENCIES/generic/include/boost/iostreams/detail/select.hpp @ 16:2665513ce2d3

Add boost headers

+// (C) Copyright 2008 CodeRage, LLC (turkanis at coderage dot com)
+// (C) Copyright 2003-2007 Jonathan Turkanis
+// Distributed under 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 http://www.boost.org/libs/iostreams for documentation.
+
+// Contains the metafunction select, which mimics the effect of a chain of
+// nested mpl if_'s.
+//
+// -----------------------------------------------------------------------------
+//
+// Usage:
+//      
+// typedef typename select<
+//                      case1,  type1,
+//                      case2,  type2,
+//                      ...
+//                      true_,  typen
+//                  >::type selection;
+//
+// Here case1, case2, ... are models of MPL::IntegralConstant with value type
+// bool, and n <= 12.
+
+#ifndef BOOST_IOSTREAMS_SELECT_HPP_INCLUDED
+#define BOOST_IOSTREAMS_SELECT_HPP_INCLUDED   
+
+#if defined(_MSC_VER) && (_MSC_VER >= 1020)
+# pragma once
+#endif                  
+ 
+#include <boost/type_traits/is_base_and_derived.hpp>
+#include <boost/mpl/eval_if.hpp>
+#include <boost/mpl/identity.hpp>
+#include <boost/mpl/if.hpp>
+#include <boost/mpl/void.hpp>
+
+namespace boost { namespace iostreams { 
+
+typedef mpl::true_ else_;
+
+template< typename Case1 = mpl::true_,
+          typename Type1 = mpl::void_,
+          typename Case2 = mpl::true_,
+          typename Type2 = mpl::void_,
+          typename Case3 = mpl::true_,
+          typename Type3 = mpl::void_,
+          typename Case4 = mpl::true_,
+          typename Type4 = mpl::void_,
+          typename Case5 = mpl::true_,
+          typename Type5 = mpl::void_,
+          typename Case6 = mpl::true_,
+          typename Type6 = mpl::void_,
+          typename Case7 = mpl::true_,
+          typename Type7 = mpl::void_,
+          typename Case8 = mpl::true_,
+          typename Type8 = mpl::void_,
+          typename Case9 = mpl::true_,
+          typename Type9 = mpl::void_,
+          typename Case10 = mpl::true_,
+          typename Type10 = mpl::void_,
+          typename Case11 = mpl::true_,
+          typename Type11 = mpl::void_,
+          typename Case12 = mpl::true_,
+          typename Type12 = mpl::void_ >
+struct select {
+    typedef typename
+            mpl::eval_if<
+                Case1, mpl::identity<Type1>, mpl::eval_if<
+                Case2, mpl::identity<Type2>, mpl::eval_if<
+                Case3, mpl::identity<Type3>, mpl::eval_if<
+                Case4, mpl::identity<Type4>, mpl::eval_if<
+                Case5, mpl::identity<Type5>, mpl::eval_if<
+                Case6, mpl::identity<Type6>, mpl::eval_if<
+                Case7, mpl::identity<Type7>, mpl::eval_if<
+                Case8, mpl::identity<Type8>, mpl::eval_if<
+                Case9, mpl::identity<Type9>, mpl::eval_if<
+                Case10, mpl::identity<Type10>, mpl::eval_if<
+                Case11, mpl::identity<Type11>, mpl::if_<
+                Case12, Type12, mpl::void_ > > > > > > > > > > >
+            >::type type;
+};
+
+} } // End namespaces iostreams, boost.
+
+#endif // #ifndef BOOST_IOSTREAMS_SELECT_HPP_INCLUDED