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f44479bcd3
It is better to manage warnings on our side to know what warnings we need to fix or suppress, and the only thing that header does is disabling deprecation warnings on MSVC and ICC which we would prefer to not show to users.
121 lines
4.2 KiB
C++
121 lines
4.2 KiB
C++
/*=============================================================================
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Copyright (c) 2002-2010 Hartmut Kaiser
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Copyright (c) 2002-2010 Joel de Guzman
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Distributed under the Boost Software License, Version 1.0. (See accompanying
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file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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=============================================================================*/
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///////////////////////////////////////////////////////////////////////////////
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//
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// This sample demonstrates a generator for a comma separated list of numbers.
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// No actions. It is based on the example qi/num_lists.cpp for reading in
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// some numbers to generate.
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//
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///////////////////////////////////////////////////////////////////////////////
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#include <boost/spirit/include/qi.hpp>
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#include <boost/spirit/include/karma.hpp>
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#include <iostream>
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#include <string>
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#include <list>
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namespace client
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{
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namespace qi = boost::spirit::qi;
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namespace karma = boost::spirit::karma;
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namespace ascii = boost::spirit::ascii;
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///////////////////////////////////////////////////////////////////////////
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// Our number list parser, please see the example qi/numlist1.cpp for
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// more information
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///////////////////////////////////////////////////////////////////////////
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template <typename Iterator>
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bool parse_numbers(Iterator first, Iterator last, std::list<double>& v)
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{
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using qi::double_;
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using qi::phrase_parse;
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using ascii::space;
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bool r = phrase_parse(first, last, double_ >> *(',' >> double_), space, v);
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if (first != last)
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return false;
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return r;
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}
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///////////////////////////////////////////////////////////////////////////
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// Our number list generator
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///////////////////////////////////////////////////////////////////////////
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//[tutorial_karma_numlist1
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template <typename OutputIterator>
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bool generate_numbers(OutputIterator& sink, std::list<double> const& v)
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{
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using karma::double_;
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using karma::generate_delimited;
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using ascii::space;
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bool r = generate_delimited(
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sink, // destination: output iterator
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double_ << *(',' << double_), // the generator
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space, // the delimiter-generator
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v // the data to output
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);
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return r;
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}
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//]
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}
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////////////////////////////////////////////////////////////////////////////
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// Main program
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////////////////////////////////////////////////////////////////////////////
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int
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main()
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{
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std::cout << "/////////////////////////////////////////////////////////\n\n";
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std::cout << "\t\tA comma separated list generator for Spirit...\n\n";
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std::cout << "/////////////////////////////////////////////////////////\n\n";
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std::cout << "Give me a comma separated list of numbers.\n";
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std::cout << "Type [q or Q] to quit\n\n";
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std::string str;
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while (getline(std::cin, str))
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{
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if (str.empty() || str[0] == 'q' || str[0] == 'Q')
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break;
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std::list<double> v; // here we put the data to generate
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if (client::parse_numbers(str.begin(), str.end(), v))
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{
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// ok, we got some numbers, now print them back out
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std::cout << "-------------------------\n";
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std::string generated;
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std::back_insert_iterator<std::string> sink(generated);
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if (!client::generate_numbers(sink, v))
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{
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std::cout << "-------------------------\n";
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std::cout << "Generating failed\n";
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std::cout << "-------------------------\n";
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}
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else
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{
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std::cout << "-------------------------\n";
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std::cout << "Generated: " << generated << "\n";
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std::cout << "-------------------------\n";
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}
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}
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else
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{
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std::cout << "-------------------------\n";
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std::cout << "Parsing failed\n";
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std::cout << "-------------------------\n";
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}
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}
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std::cout << "Bye... :-) \n\n";
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return 0;
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}
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