1 /*=============================================================================
2 Copyright (c) 2002-2010 Joel de Guzman
3
4 Distributed under the Boost Software License, Version 1.0. (See accompanying
5 file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
6 =============================================================================*/
7 ///////////////////////////////////////////////////////////////////////////////
8 //
9 // A parser for arbitrary tuples. This example presents a parser
10 // for an employee structure.
11 //
12 // [ JDG May 9, 2007 ]
13 //
14 ///////////////////////////////////////////////////////////////////////////////
15
16 #include <boost/config/warning_disable.hpp>
17 #include <boost/spirit/include/qi.hpp>
18 #include <boost/spirit/include/phoenix_core.hpp>
19 #include <boost/spirit/include/phoenix_operator.hpp>
20 #include <boost/spirit/include/phoenix_object.hpp>
21 #include <boost/fusion/include/adapt_struct.hpp>
22 #include <boost/fusion/include/io.hpp>
23
24 #include <iostream>
25 #include <string>
26 #include <complex>
27
28 namespace client
29 {
30 namespace qi = boost::spirit::qi;
31 namespace ascii = boost::spirit::ascii;
32
33 ///////////////////////////////////////////////////////////////////////////
34 // Our employee struct
35 ///////////////////////////////////////////////////////////////////////////
36 //[tutorial_employee_struct
37 struct employee
38 {
39 int age;
40 std::string surname;
41 std::string forename;
42 double salary;
43 };
44 //]
45 }
46
47 // We need to tell fusion about our employee struct
48 // to make it a first-class fusion citizen. This has to
49 // be in global scope.
50
51 //[tutorial_employee_adapt_struct
52 BOOST_FUSION_ADAPT_STRUCT(
53 client::employee,
54 (int, age)
55 (std::string, surname)
56 (std::string, forename)
57 (double, salary)
58 )
59 //]
60
61 namespace client
62 {
63 ///////////////////////////////////////////////////////////////////////////////
64 // Our employee parser
65 ///////////////////////////////////////////////////////////////////////////////
66 //[tutorial_employee_parser
67 template <typename Iterator>
68 struct employee_parser : qi::grammar<Iterator, employee(), ascii::space_type>
69 {
employee_parserclient::employee_parser70 employee_parser() : employee_parser::base_type(start)
71 {
72 using qi::int_;
73 using qi::lit;
74 using qi::double_;
75 using qi::lexeme;
76 using ascii::char_;
77
78 quoted_string %= lexeme['"' >> +(char_ - '"') >> '"'];
79
80 start %=
81 lit("employee")
82 >> '{'
83 >> int_ >> ','
84 >> quoted_string >> ','
85 >> quoted_string >> ','
86 >> double_
87 >> '}'
88 ;
89 }
90
91 qi::rule<Iterator, std::string(), ascii::space_type> quoted_string;
92 qi::rule<Iterator, employee(), ascii::space_type> start;
93 };
94 //]
95 }
96
97 ////////////////////////////////////////////////////////////////////////////
98 // Main program
99 ////////////////////////////////////////////////////////////////////////////
100 int
main()101 main()
102 {
103 std::cout << "/////////////////////////////////////////////////////////\n\n";
104 std::cout << "\t\tAn employee parser for Spirit...\n\n";
105 std::cout << "/////////////////////////////////////////////////////////\n\n";
106
107 std::cout
108 << "Give me an employee of the form :"
109 << "employee{age, \"surname\", \"forename\", salary } \n";
110 std::cout << "Type [q or Q] to quit\n\n";
111
112 using boost::spirit::ascii::space;
113 typedef std::string::const_iterator iterator_type;
114 typedef client::employee_parser<iterator_type> employee_parser;
115
116 employee_parser g; // Our grammar
117 std::string str;
118 while (getline(std::cin, str))
119 {
120 if (str.empty() || str[0] == 'q' || str[0] == 'Q')
121 break;
122
123 client::employee emp;
124 std::string::const_iterator iter = str.begin();
125 std::string::const_iterator end = str.end();
126 bool r = phrase_parse(iter, end, g, space, emp);
127
128 if (r && iter == end)
129 {
130 std::cout << boost::fusion::tuple_open('[');
131 std::cout << boost::fusion::tuple_close(']');
132 std::cout << boost::fusion::tuple_delimiter(", ");
133
134 std::cout << "-------------------------\n";
135 std::cout << "Parsing succeeded\n";
136 std::cout << "got: " << boost::fusion::as_vector(emp) << std::endl;
137 std::cout << "\n-------------------------\n";
138 }
139 else
140 {
141 std::cout << "-------------------------\n";
142 std::cout << "Parsing failed\n";
143 std::cout << "-------------------------\n";
144 }
145 }
146
147 std::cout << "Bye... :-) \n\n";
148 return 0;
149 }
150
151
152