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/*=============================================================================
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/spirit/include/qi.hpp>
#include <boost/phoenix/core.hpp>
#include <boost/phoenix/operator.hpp>
#include <boost/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;
}
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