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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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