| /*============================================================================= |
| Copyright (c) 2002-2010 Hartmut Kaiser |
| 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) |
| =============================================================================*/ |
| /////////////////////////////////////////////////////////////////////////////// |
| // |
| // This sample demonstrates a generator for a comma separated list of numbers. |
| // No actions. It is based on the example qi/num_lists.cpp for reading in |
| // some numbers to generate. |
| // |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| #include <boost/config/warning_disable.hpp> |
| #include <boost/spirit/include/qi.hpp> |
| #include <boost/spirit/include/karma.hpp> |
| |
| #include <iostream> |
| #include <string> |
| #include <vector> |
| |
| namespace client |
| { |
| /////////////////////////////////////////////////////////////////////////// |
| // Our number list parser, please see the example qi/numlist1.cpp for |
| // more information |
| /////////////////////////////////////////////////////////////////////////// |
| template <typename Iterator> |
| bool parse_numbers(Iterator first, Iterator last, std::vector<double>& v) |
| { |
| using boost::spirit::qi::double_; |
| using boost::spirit::qi::phrase_parse; |
| using boost::spirit::ascii::space; |
| |
| bool r = phrase_parse(first, last, double_ % ',', space, v); |
| if (first != last) |
| return false; |
| return r; |
| } |
| |
| /////////////////////////////////////////////////////////////////////////// |
| // Our number list generator |
| /////////////////////////////////////////////////////////////////////////// |
| //[tutorial_karma_numlist2 |
| template <typename OutputIterator, typename Container> |
| bool generate_numbers(OutputIterator& sink, Container const& v) |
| { |
| using boost::spirit::karma::double_; |
| using boost::spirit::karma::generate_delimited; |
| using boost::spirit::ascii::space; |
| |
| bool r = generate_delimited( |
| sink, // destination: output iterator |
| double_ % ',', // the generator |
| space, // the delimiter-generator |
| v // the data to output |
| ); |
| return r; |
| } |
| //] |
| } |
| |
| //////////////////////////////////////////////////////////////////////////// |
| // Main program |
| //////////////////////////////////////////////////////////////////////////// |
| int |
| main() |
| { |
| std::cout << "/////////////////////////////////////////////////////////\n\n"; |
| std::cout << "\t\tA comma separated list generator for Spirit...\n\n"; |
| std::cout << "/////////////////////////////////////////////////////////\n\n"; |
| |
| std::cout << "Give me a comma separated list of numbers.\n"; |
| std::cout << "Type [q or Q] to quit\n\n"; |
| |
| std::string str; |
| while (getline(std::cin, str)) |
| { |
| if (str.empty() || str[0] == 'q' || str[0] == 'Q') |
| break; |
| |
| std::vector<double> v; // here we put the data to generate |
| if (client::parse_numbers(str.begin(), str.end(), v)) |
| { |
| // ok, we got some numbers, now print them back out |
| std::cout << "-------------------------\n"; |
| |
| std::string generated; |
| std::back_insert_iterator<std::string> sink(generated); |
| if (!client::generate_numbers(sink, v)) |
| { |
| std::cout << "-------------------------\n"; |
| std::cout << "Generating failed\n"; |
| std::cout << "-------------------------\n"; |
| } |
| else |
| { |
| std::cout << "-------------------------\n"; |
| std::cout << "Generated: " << generated << "\n"; |
| std::cout << "-------------------------\n"; |
| } |
| } |
| else |
| { |
| std::cout << "-------------------------\n"; |
| std::cout << "Parsing failed\n"; |
| std::cout << "-------------------------\n"; |
| } |
| } |
| |
| std::cout << "Bye... :-) \n\n"; |
| return 0; |
| } |
| |
| |