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- /*=============================================================================
- Copyright (c) 2002-2003 Joel de Guzman
- http://spirit.sourceforge.net/
- Use, modification and distribution is subject to 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)
- =============================================================================*/
- ///////////////////////////////////////////////////////////////////////////////
- //
- // Demonstrates use of boost::bind and spirit
- // This is discussed in the "Functional" chapter in the Spirit User's Guide.
- //
- // [ JDG 9/29/2002 ]
- //
- ///////////////////////////////////////////////////////////////////////////////
- #include <boost/spirit/include/classic_core.hpp>
- #include <boost/bind.hpp>
- #include <iostream>
- #include <vector>
- #include <string>
- ///////////////////////////////////////////////////////////////////////////////
- using namespace std;
- using namespace BOOST_SPIRIT_CLASSIC_NS;
- using namespace boost;
- ///////////////////////////////////////////////////////////////////////////////
- //
- // Our comma separated list parser
- //
- ///////////////////////////////////////////////////////////////////////////////
- class list_parser
- {
- public:
- typedef list_parser self_t;
- bool
- parse(char const* str)
- {
- return BOOST_SPIRIT_CLASSIC_NS::parse(str,
- // Begin grammar
- (
- real_p
- [
- bind(&self_t::add, this, _1)
- ]
- >> *( ','
- >> real_p
- [
- bind(&self_t::add, this, _1)
- ]
- )
- )
- ,
- // End grammar
- space_p).full;
- }
- void
- add(double n)
- {
- v.push_back(n);
- }
- void
- print() const
- {
- for (vector<double>::size_type i = 0; i < v.size(); ++i)
- cout << i << ": " << v[i] << endl;
- }
- vector<double> v;
- };
- ////////////////////////////////////////////////////////////////////////////
- //
- // Main program
- //
- ////////////////////////////////////////////////////////////////////////////
- int
- main()
- {
- cout << "/////////////////////////////////////////////////////////\n\n";
- cout << "\tA comma separated list parser for Spirit...\n";
- cout << "\tDemonstrates use of boost::bind and spirit\n";
- cout << "/////////////////////////////////////////////////////////\n\n";
- cout << "Give me a comma separated list of numbers.\n";
- cout << "The numbers will be inserted in a vector of numbers\n";
- cout << "Type [q or Q] to quit\n\n";
- string str;
- while (getline(cin, str))
- {
- if (str.empty() || str[0] == 'q' || str[0] == 'Q')
- break;
- list_parser lp;
- if (lp.parse(str.c_str()))
- {
- cout << "-------------------------\n";
- cout << "Parsing succeeded\n";
- cout << str << " Parses OK: " << endl;
- lp.print();
- cout << "-------------------------\n";
- }
- else
- {
- cout << "-------------------------\n";
- cout << "Parsing failed\n";
- cout << "-------------------------\n";
- }
- }
- cout << "Bye... :-) \n\n";
- return 0;
- }
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