/*============================================================================= Boost.Wave: A Standard compliant C++ preprocessor library Definition of the abstract lexer interface for the xpressive lexer http://www.boost.org/ Copyright (c) 2001-2010 Hartmut Kaiser. 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) =============================================================================*/ #if !defined(XLEX_INTERFACE_HPP) #define XLEX_INTERFACE_HPP #include <boost/wave/language_support.hpp> #include <boost/wave/util/file_position.hpp> #include <boost/wave/cpplexer/cpp_lex_interface.hpp> /////////////////////////////////////////////////////////////////////////////// namespace boost { namespace wave { namespace cpplexer { namespace xlex { #if BOOST_WAVE_SEPARATE_LEXER_INSTANTIATION != 0 #define BOOST_WAVE_NEW_LEXER_DECL BOOST_WAVE_DECL #else #define BOOST_WAVE_NEW_LEXER_DECL #endif /////////////////////////////////////////////////////////////////////////////// // // new_lexer_gen: generates a new instance of the required C++ lexer // /////////////////////////////////////////////////////////////////////////////// template < typename IteratorT, typename PositionT = wave::util::file_position_type > struct BOOST_WAVE_NEW_LEXER_DECL new_lexer_gen { // The NewLexer function allows the opaque generation of a new lexer object. // It is coupled to the token type to allow to decouple the lexer/token // configurations at compile time. static wave::cpplexer::lex_input_interface<wave::cpplexer::lex_token<PositionT> > * new_lexer(IteratorT const &first, IteratorT const &last, PositionT const &pos, wave::language_support language); }; #undef BOOST_WAVE_NEW_LEXER_DECL /////////////////////////////////////////////////////////////////////////////// // // The xlex_input_interface helps to instantiate a concrete lexer to be used // by the Wave preprocessor module. // This is done to allow compile time reduction. // /////////////////////////////////////////////////////////////////////////////// template <typename TokenT> struct xlex_input_interface : lex_input_interface<TokenT> { typedef typename wave::cpplexer::lex_input_interface<TokenT>::position_type position_type; ~xlex_input_interface() {} // The new_lexer function allows the opaque generation of a new lexer object. // It is coupled to the token type to allow to distinguish different // lexer/token configurations at compile time. template <typename IteratorT> static wave::cpplexer::lex_input_interface<TokenT> * new_lexer(IteratorT const &first, IteratorT const &last, position_type const &pos, wave::language_support language) { return new_lexer_gen<IteratorT, position_type>::new_lexer (first, last, pos, language); } }; /////////////////////////////////////////////////////////////////////////////// } // namespace xlex } // namespace cpplexer } // namespace wave } // namespace boost #endif // !defined(XLEX_INTERFACE_HPP)