Added boost header

test/external/boost/mpl/index_if.hpp

@@ -0,0 +1,60 @@
+
+#ifndef BOOST_MPL_INDEX_IF_HPP_INCLUDED
+#define BOOST_MPL_INDEX_IF_HPP_INCLUDED
+
+// Copyright Eric Friedman 2003
+//
+// 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/mpl for documentation.
+
+// $Id: index_if.hpp 49267 2008-10-11 06:19:02Z agurtovoy $
+// $Date: 2008-10-11 02:19:02 -0400 (Sat, 11 Oct 2008) $
+// $Revision: 49267 $
+
+#include <boost/mpl/aux_/find_if_pred.hpp>
+#include <boost/mpl/begin_end.hpp>
+#include <boost/mpl/if.hpp>
+#include <boost/mpl/int.hpp>
+#include <boost/mpl/iter_fold_if.hpp>
+#include <boost/mpl/next.hpp>
+#include <boost/mpl/void.hpp>
+#include <boost/mpl/aux_/na_spec.hpp>
+#include <boost/mpl/aux_/lambda_support.hpp>
+#include <boost/type_traits/is_same.hpp>
+
+namespace boost { namespace mpl {
+
+template<
+      typename BOOST_MPL_AUX_NA_PARAM(Sequence)
+    , typename BOOST_MPL_AUX_NA_PARAM(Predicate)
+    >
+struct index_if
+{
+    typedef typename iter_fold_if<
+          Sequence
+        , int_<0>
+        , next<>
+        , aux::find_if_pred<Predicate>
+        >::type result_;
+
+    typedef typename end<Sequence>::type not_found_;
+    typedef typename first<result_>::type result_index_;
+    typedef typename second<result_>::type result_iterator_;
+
+    typedef typename if_<
+          is_same< result_iterator_,not_found_ >
+        , void_
+        , result_index_
+        >::type type;
+
+    BOOST_MPL_AUX_LAMBDA_SUPPORT(2,index_if,(Sequence,Predicate))
+};
+
+BOOST_MPL_AUX_NA_SPEC(2, index_if)
+
+}}
+
+#endif // BOOST_MPL_INDEX_IF_HPP_INCLUDED