| /*============================================================================= |
| 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) |