1 
2 #ifndef BOOST_MPL_INDEX_OF_HPP_INCLUDED
3 #define BOOST_MPL_INDEX_OF_HPP_INCLUDED
4 
5 // Copyright Aleksey Gurtovoy 2003-2004
6 // Copyright Eric Friedman 2003
7 //
8 // Distributed under the Boost Software License, Version 1.0.
9 // (See accompanying file LICENSE_1_0.txt or copy at
10 // http://www.boost.org/LICENSE_1_0.txt)
11 //
12 // See http://www.boost.org/libs/mpl for documentation.
13 
14 // $Id$
15 // $Date$
16 // $Revision$
17 
18 #include <boost/mpl/index_if.hpp>
19 #include <boost/mpl/same_as.hpp>
20 #include <boost/mpl/aux_/na_spec.hpp>
21 #include <boost/mpl/aux_/lambda_support.hpp>
22 
23 namespace boost { namespace mpl {
24 
25 template<
26       typename BOOST_MPL_AUX_NA_PARAM(Sequence)
27     , typename BOOST_MPL_AUX_NA_PARAM(T)
28     >
29 struct index_of
30     : index_if< Sequence,same_as<T> >
31 {
32     BOOST_MPL_AUX_LAMBDA_SUPPORT(2,index_of,(Sequence,T))
33 };
34 
35 BOOST_MPL_AUX_NA_SPEC(2, index_of)
36 
37 }}
38 
39 #endif // BOOST_MPL_INDEX_OF_HPP_INCLUDED
40