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- /*=============================================================================
- Copyright (c) 2002-2015 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 ]
- // [ JDG May 13, 2015 ] spirit X3
- //
- ///////////////////////////////////////////////////////////////////////////////
- #include <boost/config/warning_disable.hpp>
- #include <boost/spirit/home/x3.hpp>
- #include <boost/fusion/include/adapt_struct.hpp>
- #include <boost/fusion/include/io.hpp>
- #include <iostream>
- #include <string>
- namespace client { namespace ast
- {
- ///////////////////////////////////////////////////////////////////////////
- // Our employee struct
- ///////////////////////////////////////////////////////////////////////////
- struct employee
- {
- int age;
- std::string forename;
- std::string surname;
- double salary;
- };
- using boost::fusion::operator<<;
- }}
- // We need to tell fusion about our employee struct
- // to make it a first-class fusion citizen. This has to
- // be in global scope.
- BOOST_FUSION_ADAPT_STRUCT(client::ast::employee,
- age, forename, surname, salary
- )
- namespace client
- {
- ///////////////////////////////////////////////////////////////////////////////
- // Our employee parser
- ///////////////////////////////////////////////////////////////////////////////
- namespace parser
- {
- namespace x3 = boost::spirit::x3;
- namespace ascii = boost::spirit::x3::ascii;
- using x3::int_;
- using x3::lit;
- using x3::double_;
- using x3::lexeme;
- using ascii::char_;
- x3::rule<class employee, ast::employee> const employee = "employee";
- auto const quoted_string = lexeme['"' >> +(char_ - '"') >> '"'];
- auto const employee_def =
- lit("employee")
- >> '{'
- >> int_ >> ','
- >> quoted_string >> ','
- >> quoted_string >> ','
- >> double_
- >> '}'
- ;
- BOOST_SPIRIT_DEFINE(employee);
- }
- }
- ////////////////////////////////////////////////////////////////////////////
- // 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, \"forename\", \"surname\", salary } \n";
- std::cout << "Type [q or Q] to quit\n\n";
- using boost::spirit::x3::ascii::space;
- typedef std::string::const_iterator iterator_type;
- using client::parser::employee;
- std::string str;
- while (getline(std::cin, str))
- {
- if (str.empty() || str[0] == 'q' || str[0] == 'Q')
- break;
- client::ast::employee emp;
- iterator_type iter = str.begin();
- iterator_type const end = str.end();
- bool r = phrase_parse(iter, end, employee, 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: " << 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;
- }
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