| // 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) |
| |
| // The purpose of this example is to show, how it is possible to use a lexer |
| // token definition for two purposes: |
| // |
| // . To generate C++ code implementing a static lexical analyzer allowing |
| // to recognize all defined tokens (this file) |
| // . To integrate the generated C++ lexer into the /Spirit/ framework. |
| // (see the file: word_count_lexer_static.cpp) |
| |
| // #define BOOST_SPIRIT_LEXERTL_DEBUG |
| |
| #include <boost/config/warning_disable.hpp> |
| #include <boost/spirit/include/lex_lexertl.hpp> |
| #include <boost/spirit/include/lex_generate_static_lexertl.hpp> |
| |
| #include <fstream> |
| |
| #include "word_count_lexer_tokens.hpp" |
| |
| using namespace boost::spirit; |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| //[wcl_static_generate_main |
| int main(int argc, char* argv[]) |
| { |
| // create the lexer object instance needed to invoke the generator |
| word_count_lexer_tokens<lex::lexertl::actor_lexer<> > word_count; // the token definition |
| |
| // open the output file, where the generated tokenizer function will be |
| // written to |
| std::ofstream out(argc < 2 ? "word_count_lexer_static.hpp" : argv[1]); |
| |
| // invoke the generator, passing the token definition, the output stream |
| // and the name prefix of the tokenizing function to be generated |
| // |
| // The suffix "wcl" used below results in a type lexertl::static_::lexer_wcl |
| // to be generated, which needs to be passed as a template parameter to the |
| // lexertl::static_lexer template (see word_count_lexer_static.cpp). |
| return lex::lexertl::generate_static_dfa(word_count, out, "wcl") ? 0 : -1; |
| } |
| //] |