1 
2 #ifndef BOOST_MPL_FIND_IF_HPP_INCLUDED
3 #define BOOST_MPL_FIND_IF_HPP_INCLUDED
4 
5 // Copyright Aleksey Gurtovoy 2000-2004
6 //
7 // Distributed under the Boost Software License, Version 1.0.
8 // (See accompanying file LICENSE_1_0.txt or copy at
9 // http://www.boost.org/LICENSE_1_0.txt)
10 //
11 // See http://www.boost.org/libs/mpl for documentation.
12 
13 // $Id$
14 // $Date$
15 // $Revision$
16 
17 #include <boost/mpl/aux_/find_if_pred.hpp>
18 #include <boost/mpl/arg.hpp>
19 #include <boost/mpl/iter_fold_if.hpp>
20 #include <boost/mpl/aux_/common_name_wknd.hpp>
21 #include <boost/mpl/aux_/na_spec.hpp>
22 #include <boost/mpl/aux_/lambda_support.hpp>
23 
24 namespace boost { namespace mpl {
25 
26 BOOST_MPL_AUX_COMMON_NAME_WKND(find_if)
27 
28 template<
29       typename BOOST_MPL_AUX_NA_PARAM(Sequence)
30     , typename BOOST_MPL_AUX_NA_PARAM(Predicate)
31     >
32 struct find_if
33 {
34     typedef typename iter_fold_if<
35           Sequence
36         , void
37         , mpl::arg<1> // ignore
38         , protect< aux::find_if_pred<Predicate> >
39         >::type result_;
40 
41     typedef typename second<result_>::type type;
42 
43     BOOST_MPL_AUX_LAMBDA_SUPPORT(2,find_if,(Sequence,Predicate))
44 };
45 
46 BOOST_MPL_AUX_NA_SPEC(2,find_if)
47 
48 }}
49 
50 #endif // BOOST_MPL_FIND_IF_HPP_INCLUDED
51