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1 /*=============================================================================
2 Copyright (c) 2002-2010 Hartmut Kaiser
3 Copyright (c) 2002-2010 Joel de Guzman
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 ///////////////////////////////////////////////////////////////////////////////
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.
14 ///////////////////////////////////////////////////////////////////////////////
16 #include <boost/spirit/include/qi.hpp>
17 #include <boost/spirit/include/karma.hpp>
25 namespace qi
= boost::spirit::qi
;
26 namespace karma
= boost::spirit::karma
;
27 namespace ascii
= boost::spirit::ascii
;
29 ///////////////////////////////////////////////////////////////////////////
30 // Our number list parser, please see the example qi/numlist1.cpp for
32 ///////////////////////////////////////////////////////////////////////////
33 template <typename Iterator
>
34 bool parse_numbers(Iterator first
, Iterator last
, std::list
<double>& v
)
37 using qi::phrase_parse
;
40 bool r
= phrase_parse(first
, last
, double_
>> *(',' >> double_
), space
, v
);
46 ///////////////////////////////////////////////////////////////////////////
47 // Our number list generator
48 ///////////////////////////////////////////////////////////////////////////
49 //[tutorial_karma_numlist1
50 template <typename OutputIterator
>
51 bool generate_numbers(OutputIterator
& sink
, std::list
<double> const& v
)
54 using karma::generate_delimited
;
57 bool r
= generate_delimited(
58 sink
, // destination: output iterator
59 double_
<< *(',' << double_
), // the generator
60 space
, // the delimiter-generator
61 v
// the data to output
68 ////////////////////////////////////////////////////////////////////////////
70 ////////////////////////////////////////////////////////////////////////////
74 std::cout
<< "/////////////////////////////////////////////////////////\n\n";
75 std::cout
<< "\t\tA comma separated list generator for Spirit...\n\n";
76 std::cout
<< "/////////////////////////////////////////////////////////\n\n";
78 std::cout
<< "Give me a comma separated list of numbers.\n";
79 std::cout
<< "Type [q or Q] to quit\n\n";
82 while (getline(std::cin
, str
))
84 if (str
.empty() || str
[0] == 'q' || str
[0] == 'Q')
87 std::list
<double> v
; // here we put the data to generate
88 if (client::parse_numbers(str
.begin(), str
.end(), v
))
90 // ok, we got some numbers, now print them back out
91 std::cout
<< "-------------------------\n";
93 std::string generated
;
94 std::back_insert_iterator
<std::string
> sink(generated
);
95 if (!client::generate_numbers(sink
, v
))
97 std::cout
<< "-------------------------\n";
98 std::cout
<< "Generating failed\n";
99 std::cout
<< "-------------------------\n";
103 std::cout
<< "-------------------------\n";
104 std::cout
<< "Generated: " << generated
<< "\n";
105 std::cout
<< "-------------------------\n";
110 std::cout
<< "-------------------------\n";
111 std::cout
<< "Parsing failed\n";
112 std::cout
<< "-------------------------\n";
116 std::cout
<< "Bye... :-) \n\n";