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1 | /*============================================================================= |
2 | Copyright (c) 2002-2010 Hartmut Kaiser | |
3 | Copyright (c) 2002-2010 Joel de Guzman | |
4 | ||
5 | Distributed under the Boost Software License, Version 1.0. (See accompanying | |
6 | file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) | |
7 | =============================================================================*/ | |
8 | /////////////////////////////////////////////////////////////////////////////// | |
9 | // | |
10 | // This sample demonstrates a generator for a comma separated list of numbers. | |
11 | // No actions. It is based on the example qi/num_lists.cpp for reading in | |
12 | // some numbers to generate. | |
13 | // | |
14 | /////////////////////////////////////////////////////////////////////////////// | |
15 | ||
7c673cae FG |
16 | #include <boost/spirit/include/qi.hpp> |
17 | #include <boost/spirit/include/karma.hpp> | |
18 | ||
19 | #include <iostream> | |
20 | #include <string> | |
21 | #include <vector> | |
22 | ||
23 | namespace client | |
24 | { | |
25 | /////////////////////////////////////////////////////////////////////////// | |
26 | // Our number list parser, please see the example qi/numlist1.cpp for | |
27 | // more information | |
28 | /////////////////////////////////////////////////////////////////////////// | |
29 | template <typename Iterator> | |
30 | bool parse_numbers(Iterator first, Iterator last, std::vector<double>& v) | |
31 | { | |
32 | using boost::spirit::qi::double_; | |
33 | using boost::spirit::qi::phrase_parse; | |
34 | using boost::spirit::ascii::space; | |
35 | ||
36 | bool r = phrase_parse(first, last, double_ % ',', space, v); | |
37 | if (first != last) | |
38 | return false; | |
39 | return r; | |
40 | } | |
41 | ||
42 | /////////////////////////////////////////////////////////////////////////// | |
43 | // Our number list generator | |
44 | /////////////////////////////////////////////////////////////////////////// | |
45 | //[tutorial_karma_numlist2 | |
46 | template <typename OutputIterator, typename Container> | |
47 | bool generate_numbers(OutputIterator& sink, Container const& v) | |
48 | { | |
49 | using boost::spirit::karma::double_; | |
50 | using boost::spirit::karma::generate_delimited; | |
51 | using boost::spirit::ascii::space; | |
52 | ||
53 | bool r = generate_delimited( | |
54 | sink, // destination: output iterator | |
55 | double_ % ',', // the generator | |
56 | space, // the delimiter-generator | |
57 | v // the data to output | |
58 | ); | |
59 | return r; | |
60 | } | |
61 | //] | |
62 | } | |
63 | ||
64 | //////////////////////////////////////////////////////////////////////////// | |
65 | // Main program | |
66 | //////////////////////////////////////////////////////////////////////////// | |
67 | int | |
68 | main() | |
69 | { | |
70 | std::cout << "/////////////////////////////////////////////////////////\n\n"; | |
71 | std::cout << "\t\tA comma separated list generator for Spirit...\n\n"; | |
72 | std::cout << "/////////////////////////////////////////////////////////\n\n"; | |
73 | ||
74 | std::cout << "Give me a comma separated list of numbers.\n"; | |
75 | std::cout << "Type [q or Q] to quit\n\n"; | |
76 | ||
77 | std::string str; | |
78 | while (getline(std::cin, str)) | |
79 | { | |
80 | if (str.empty() || str[0] == 'q' || str[0] == 'Q') | |
81 | break; | |
82 | ||
83 | std::vector<double> v; // here we put the data to generate | |
84 | if (client::parse_numbers(str.begin(), str.end(), v)) | |
85 | { | |
86 | // ok, we got some numbers, now print them back out | |
87 | std::cout << "-------------------------\n"; | |
88 | ||
89 | std::string generated; | |
90 | std::back_insert_iterator<std::string> sink(generated); | |
91 | if (!client::generate_numbers(sink, v)) | |
92 | { | |
93 | std::cout << "-------------------------\n"; | |
94 | std::cout << "Generating failed\n"; | |
95 | std::cout << "-------------------------\n"; | |
96 | } | |
97 | else | |
98 | { | |
99 | std::cout << "-------------------------\n"; | |
100 | std::cout << "Generated: " << generated << "\n"; | |
101 | std::cout << "-------------------------\n"; | |
102 | } | |
103 | } | |
104 | else | |
105 | { | |
106 | std::cout << "-------------------------\n"; | |
107 | std::cout << "Parsing failed\n"; | |
108 | std::cout << "-------------------------\n"; | |
109 | } | |
110 | } | |
111 | ||
112 | std::cout << "Bye... :-) \n\n"; | |
113 | return 0; | |
114 | } | |
115 | ||
116 |