mirror of
https://github.com/boostorg/spirit.git
synced 2026-01-24 18:32:20 +00:00
f44479bcd3
It is better to manage warnings on our side to know what warnings we need to fix or suppress, and the only thing that header does is disabling deprecation warnings on MSVC and ICC which we would prefer to not show to users.
45 lines
1.7 KiB
C++
45 lines
1.7 KiB
C++
// 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_static.cpp)
|
|
|
|
// #define BOOST_SPIRIT_LEXERTL_DEBUG
|
|
|
|
#include <boost/spirit/include/lex_lexertl.hpp>
|
|
#include <boost/spirit/include/lex_generate_static_lexertl.hpp>
|
|
|
|
#include <fstream>
|
|
|
|
#include "word_count_tokens.hpp"
|
|
|
|
using namespace boost::spirit;
|
|
|
|
///////////////////////////////////////////////////////////////////////////////
|
|
//[wc_static_generate_main
|
|
int main(int argc, char* argv[])
|
|
{
|
|
// create the lexer object instance needed to invoke the generator
|
|
word_count_tokens<lex::lexertl::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_static.hpp" : argv[1]);
|
|
|
|
// invoke the generator, passing the token definition, the output stream
|
|
// and the name suffix of the tables and functions to be generated
|
|
//
|
|
// The suffix "wc" used below results in a type lexertl::static_::lexer_wc
|
|
// to be generated, which needs to be passed as a template parameter to the
|
|
// lexertl::static_lexer template (see word_count_static.cpp).
|
|
return lex::lexertl::generate_static_dfa(word_count, out, "wc") ? 0 : -1;
|
|
}
|
|
//]
|