123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117 |
- /*=============================================================================
- 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;
- }
|