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- // Copyright (c) 2001-2011 Hartmut Kaiser
- // Copyright (c) 2009 Jean-Francois Ostiguy
- //
- // 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)
- #include <boost/detail/lightweight_test.hpp>
- #include <boost/config/warning_disable.hpp>
- #include <boost/spirit/include/lex_lexertl.hpp>
- #include <boost/spirit/include/qi_parse.hpp>
- #include <boost/spirit/include/qi_operator.hpp>
- #include <boost/spirit/include/qi_char.hpp>
- #include <boost/spirit/include/qi_grammar.hpp>
- #include <boost/spirit/include/qi_eoi.hpp>
- #include <string>
- #include <iostream>
- #include <sstream>
- namespace lex = boost::spirit::lex;
- namespace qi = boost::spirit::qi;
- namespace mpl = boost::mpl;
- template <typename Lexer>
- struct my_lexer : lex::lexer<Lexer>
- {
- my_lexer()
- {
- delimiter = "BEGIN|END";
- identifier = "[a-zA-Z][_\\.a-zA-Z0-9]*";
- ws = "[ \\t\\n]+";
- real = "([0-9]*\\.?[0-9]+([eE][-+]?[0-9]+)?)|([-+]?[1-9]+\\.?([eE][-+]?[0-9]+))";
- integer = "[0-9]+";
- this->self += ws[lex::_pass = lex::pass_flags::pass_ignore];
- this->self += delimiter;
- this->self += identifier;
- this->self += real;
- this->self += integer;
- this->self += '=';
- this->self += ';';
- }
- lex::token_def<> ws;
- lex::token_def<std::string> identifier;
- lex::token_def<int> integer;
- lex::token_def<double> real;
- lex::token_def<> delimiter;
- };
- template <typename Iterator>
- struct my_grammar : qi::grammar<Iterator>
- {
- template <typename TokenDef>
- my_grammar( TokenDef const& tok )
- : my_grammar::base_type(statement)
- {
- statement
- = qi::eoi
- | *(delimiter | declaration)
- ;
- delimiter = tok.delimiter >> tok.identifier;
- declaration = tok.identifier >> option >> ';';
- option = *(tok.identifier >> '=' >> (tok.real | tok.integer));
- }
- qi::rule<Iterator> statement, delimiter, declaration, option;
- };
- typedef lex::lexertl::token<char const*
- , mpl::vector<std::string, double, int> > token_type;
- typedef lex::lexertl::actor_lexer<token_type> lexer_type;
- typedef my_lexer<lexer_type>::iterator_type iterator_type;
- int main()
- {
- std::string test_string ("BEGIN section\n");
- // we introduce a syntax error: ";;" instead of ";" as a terminator.
- test_string += "Identity;;\n"; // this will make the parser fail
- test_string += "END section\n" ;
- char const* first = &test_string[0];
- char const* last = &first[test_string.size()];
- my_lexer<lexer_type> lexer;
- my_grammar<iterator_type> grammar(lexer);
- BOOST_TEST(lex::tokenize_and_parse(first, last, lexer, grammar));
- BOOST_TEST(first != last);
- return boost::report_errors();
- }
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