46 lines
1.7 KiB
C++
46 lines
1.7 KiB
C++
// Copyright (c) 2001-2010 Hartmut Kaiser
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//
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// Distributed under the Boost Software License, Version 1.0. (See accompanying
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// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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// The purpose of this example is to show, how it is possible to use a lexer
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// token definition for two purposes:
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//
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// . To generate C++ code implementing a static lexical analyzer allowing
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// to recognize all defined tokens (this file)
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// . To integrate the generated C++ lexer into the /Spirit/ framework.
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// (see the file: word_count_static.cpp)
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// #define BOOST_SPIRIT_LEXERTL_DEBUG
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#include <boost/config/warning_disable.hpp>
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#include <boost/spirit/include/lex_lexertl.hpp>
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#include <boost/spirit/include/lex_generate_static_lexertl.hpp>
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#include <fstream>
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#include "word_count_tokens.hpp"
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using namespace boost::spirit;
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///////////////////////////////////////////////////////////////////////////////
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//[wc_static_generate_main
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int main(int argc, char* argv[])
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{
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// create the lexer object instance needed to invoke the generator
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word_count_tokens<lex::lexertl::lexer<> > word_count; // the token definition
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// open the output file, where the generated tokenizer function will be
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// written to
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std::ofstream out(argc < 2 ? "word_count_static.hpp" : argv[1]);
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// invoke the generator, passing the token definition, the output stream
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// and the name suffix of the tables and functions to be generated
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//
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// The suffix "wc" used below results in a type lexertl::static_::lexer_wc
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// to be generated, which needs to be passed as a template parameter to the
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// lexertl::static_lexer template (see word_count_static.cpp).
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return lex::lexertl::generate_static_dfa(word_count, out, "wc") ? 0 : -1;
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}
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//]
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