1 //  Boost string_algo library predicate_facade.hpp header file  ---------------------------//
2 
3 //  Copyright Pavol Droba 2002-2003.
4 //
5 // Distributed under the Boost Software License, Version 1.0.
6 //    (See accompanying file LICENSE_1_0.txt or copy at
7 //          http://www.boost.org/LICENSE_1_0.txt)
8 
9 //  See http://www.boost.org/ for updates, documentation, and revision history.
10 
11 #ifndef BOOST_STRING_PREDICATE_FACADE_HPP
12 #define BOOST_STRING_PREDICATE_FACADE_HPP
13 
14 #include <boost/algorithm/string/config.hpp>
15 
16 /*
17  \file boost/algorith/string/predicate_facade.hpp
18  This file contains predicate_facade definition. This template class is used
19  to identify classification predicates, so they can be combined using
20  composition operators.
21 */
22 
23 namespace boost {
24     namespace algorithm {
25 
26 //  predicate facade ------------------------------------------------------//
27 
28         //! Predicate facade
29         /*!
30             This class allows to recognize classification
31             predicates, so that they can be combined using
32             composition operators.
33             Every classification predicate must be derived from this class.
34         */
35         template<typename Derived>
36         struct predicate_facade {};
37 
38     } // namespace algorithm
39 } // namespace boost
40 
41 
42 #endif  // BOOST_STRING_CLASSIFICATION_DETAIL_HPP
43