91 lines
2.9 KiB
C++
91 lines
2.9 KiB
C++
/*=============================================================================
|
|
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 demontrates a parser for a comma separated list of numbers.
|
|
// No actions.
|
|
//
|
|
// [ JDG May 10, 2002 ] spirit1
|
|
// [ JDG March 24, 2007 ] spirit2
|
|
//
|
|
///////////////////////////////////////////////////////////////////////////////
|
|
|
|
#include <boost/config/warning_disable.hpp>
|
|
#include <boost/spirit/include/qi.hpp>
|
|
|
|
#include <iostream>
|
|
#include <string>
|
|
#include <vector>
|
|
|
|
namespace client
|
|
{
|
|
namespace qi = boost::spirit::qi;
|
|
namespace ascii = boost::spirit::ascii;
|
|
|
|
///////////////////////////////////////////////////////////////////////////
|
|
// Our number list parser
|
|
///////////////////////////////////////////////////////////////////////////
|
|
//[tutorial_numlist1
|
|
template <typename Iterator>
|
|
bool parse_numbers(Iterator first, Iterator last)
|
|
{
|
|
using qi::double_;
|
|
using qi::phrase_parse;
|
|
using ascii::space;
|
|
|
|
bool r = phrase_parse(
|
|
first, /*< start iterator >*/
|
|
last, /*< end iterator >*/
|
|
double_ >> *(',' >> double_), /*< the parser >*/
|
|
space /*< the skip-parser >*/
|
|
);
|
|
if (first != last) // fail if we did not get a full match
|
|
return false;
|
|
return r;
|
|
}
|
|
//]
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////////////
|
|
// Main program
|
|
////////////////////////////////////////////////////////////////////////////
|
|
int
|
|
main()
|
|
{
|
|
std::cout << "/////////////////////////////////////////////////////////\n\n";
|
|
std::cout << "\t\tA comma separated list parser 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;
|
|
|
|
if (client::parse_numbers(str.begin(), str.end()))
|
|
{
|
|
std::cout << "-------------------------\n";
|
|
std::cout << "Parsing succeeded\n";
|
|
std::cout << str << " Parses OK: " << std::endl;
|
|
}
|
|
else
|
|
{
|
|
std::cout << "-------------------------\n";
|
|
std::cout << "Parsing failed\n";
|
|
std::cout << "-------------------------\n";
|
|
}
|
|
}
|
|
|
|
std::cout << "Bye... :-) \n\n";
|
|
return 0;
|
|
}
|
|
|
|
|