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