| /*============================================================================= |
| Copyright (c) 2002-2010 Joel de Guzman |
| |
| 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) |
| =============================================================================*/ |
| /////////////////////////////////////////////////////////////////////////////// |
| // |
| // A parser for arbitrary tuples. This example presents a parser |
| // for an employee structure. |
| // |
| // [ JDG May 9, 2007 ] |
| // |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| #include <boost/config/warning_disable.hpp> |
| #include <boost/spirit/include/qi.hpp> |
| #include <boost/spirit/include/phoenix_core.hpp> |
| #include <boost/spirit/include/phoenix_operator.hpp> |
| #include <boost/spirit/include/phoenix_object.hpp> |
| #include <boost/fusion/include/adapt_struct.hpp> |
| #include <boost/fusion/include/io.hpp> |
| |
| #include <iostream> |
| #include <string> |
| #include <complex> |
| |
| namespace client |
| { |
| namespace qi = boost::spirit::qi; |
| namespace ascii = boost::spirit::ascii; |
| |
| /////////////////////////////////////////////////////////////////////////// |
| // Our employee struct |
| /////////////////////////////////////////////////////////////////////////// |
| //[tutorial_employee_struct |
| struct employee |
| { |
| int age; |
| std::string surname; |
| std::string forename; |
| double salary; |
| }; |
| //] |
| } |
| |
| // We need to tell fusion about our employee struct |
| // to make it a first-class fusion citizen. This has to |
| // be in global scope. |
| |
| //[tutorial_employee_adapt_struct |
| BOOST_FUSION_ADAPT_STRUCT( |
| client::employee, |
| (int, age) |
| (std::string, surname) |
| (std::string, forename) |
| (double, salary) |
| ) |
| //] |
| |
| namespace client |
| { |
| /////////////////////////////////////////////////////////////////////////////// |
| // Our employee parser |
| /////////////////////////////////////////////////////////////////////////////// |
| //[tutorial_employee_parser |
| template <typename Iterator> |
| struct employee_parser : qi::grammar<Iterator, employee(), ascii::space_type> |
| { |
| employee_parser() : employee_parser::base_type(start) |
| { |
| using qi::int_; |
| using qi::lit; |
| using qi::double_; |
| using qi::lexeme; |
| using ascii::char_; |
| |
| quoted_string %= lexeme['"' >> +(char_ - '"') >> '"']; |
| |
| start %= |
| lit("employee") |
| >> '{' |
| >> int_ >> ',' |
| >> quoted_string >> ',' |
| >> quoted_string >> ',' |
| >> double_ |
| >> '}' |
| ; |
| } |
| |
| qi::rule<Iterator, std::string(), ascii::space_type> quoted_string; |
| qi::rule<Iterator, employee(), ascii::space_type> start; |
| }; |
| //] |
| } |
| |
| //////////////////////////////////////////////////////////////////////////// |
| // Main program |
| //////////////////////////////////////////////////////////////////////////// |
| int |
| main() |
| { |
| std::cout << "/////////////////////////////////////////////////////////\n\n"; |
| std::cout << "\t\tAn employee parser for Spirit...\n\n"; |
| std::cout << "/////////////////////////////////////////////////////////\n\n"; |
| |
| std::cout |
| << "Give me an employee of the form :" |
| << "employee{age, \"surname\", \"forename\", salary } \n"; |
| std::cout << "Type [q or Q] to quit\n\n"; |
| |
| using boost::spirit::ascii::space; |
| typedef std::string::const_iterator iterator_type; |
| typedef client::employee_parser<iterator_type> employee_parser; |
| |
| employee_parser g; // Our grammar |
| std::string str; |
| while (getline(std::cin, str)) |
| { |
| if (str.empty() || str[0] == 'q' || str[0] == 'Q') |
| break; |
| |
| client::employee emp; |
| std::string::const_iterator iter = str.begin(); |
| std::string::const_iterator end = str.end(); |
| bool r = phrase_parse(iter, end, g, space, emp); |
| |
| if (r && iter == end) |
| { |
| std::cout << boost::fusion::tuple_open('['); |
| std::cout << boost::fusion::tuple_close(']'); |
| std::cout << boost::fusion::tuple_delimiter(", "); |
| |
| std::cout << "-------------------------\n"; |
| std::cout << "Parsing succeeded\n"; |
| std::cout << "got: " << boost::fusion::as_vector(emp) << std::endl; |
| std::cout << "\n-------------------------\n"; |
| } |
| else |
| { |
| std::cout << "-------------------------\n"; |
| std::cout << "Parsing failed\n"; |
| std::cout << "-------------------------\n"; |
| } |
| } |
| |
| std::cout << "Bye... :-) \n\n"; |
| return 0; |
| } |
| |
| |