| /*============================================================================= |
| Boost.Wave: A Standard compliant C++ preprocessor library |
| |
| Definition of the abstract lexer interface for the lexertl based C++ 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(BOOST_WAVE_LEXERTL_INTERFACE_HPP_INCLUDED) |
| #define BOOST_WAVE_LEXERTL_INTERFACE_HPP_INCLUDED |
| |
| #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 lexertl |
| { |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| // |
| // new_lexer_gen: generates a new instance of the required C++ lexer |
| // |
| /////////////////////////////////////////////////////////////////////////////// |
| template < |
| typename IteratorT, |
| typename PositionT = wave::util::file_position_type |
| > |
| struct 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); |
| }; |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| // |
| // The lexertl_input_interface helps to instantiate a concrete lexer |
| // to be used by the Wave preprocessor module. |
| // This is done to allow compile time reduction by separation of the lexer |
| // iterator exposed to the Wave library and the lexer implementation. |
| // |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| template <typename TokenT> |
| struct lexertl_input_interface |
| : wave::cpplexer::lex_input_interface<TokenT> |
| { |
| typedef typename wave::cpplexer::lex_input_interface<TokenT>::position_type |
| position_type; |
| |
| // 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 boost::wave::cpplexer::lexertl |
| |
| #endif // !defined(BOOST_WAVE_LEXERTL_INTERFACE_HPP_INCLUDED) |