95 lines
2.2 KiB
C++
95 lines
2.2 KiB
C++
/*=============================================================================
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Copyright (c) 2003 Sam Nabialek
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Copyright (c) 2003-2004 Joel de Guzman
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http://spirit.sourceforge.net/
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Use, modification and distribution is subject to the Boost Software
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License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
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http://www.boost.org/LICENSE_1_0.txt)
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=============================================================================*/
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#include <iostream>
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#define BOOST_SPIRIT_DEBUG
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#include <boost/spirit/include/classic_core.hpp>
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#include <boost/spirit/include/classic_error_handling.hpp>
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#include <boost/spirit/include/classic_iterator.hpp>
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#include <boost/spirit/include/classic_symbols.hpp>
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#include <boost/spirit/include/classic_utility.hpp>
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using namespace BOOST_SPIRIT_CLASSIC_NS;
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template <typename Rule>
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struct SetRest
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{
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SetRest(Rule& the_rule)
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: m_the_rule(the_rule)
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{
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}
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void operator()(Rule* new_rule) const
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{
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m_the_rule = *new_rule;
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}
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private:
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Rule& m_the_rule;
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};
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struct nabialek_trick : public grammar<nabialek_trick>
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{
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template <typename ScannerT>
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struct definition
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{
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typedef rule<ScannerT> rule_t;
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rule_t name;
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rule_t line;
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rule_t rest;
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rule_t main;
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rule_t one;
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rule_t two;
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symbols<rule_t*> continuations;
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definition(nabialek_trick const& self)
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{
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name = lexeme_d[repeat_p(1,20)[alnum_p | '_']];
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one = name;
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two = name >> ',' >> name;
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continuations.add
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("one", &one)
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("two", &two)
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;
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line = continuations[SetRest<rule_t>(rest)] >> rest;
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main = *line;
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BOOST_SPIRIT_DEBUG_RULE(name);
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BOOST_SPIRIT_DEBUG_RULE(line);
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BOOST_SPIRIT_DEBUG_RULE(rest);
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BOOST_SPIRIT_DEBUG_RULE(main);
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BOOST_SPIRIT_DEBUG_RULE(one);
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BOOST_SPIRIT_DEBUG_RULE(two);
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}
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rule_t const&
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start() const
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{
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return main;
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}
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};
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};
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int
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main()
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{
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nabialek_trick g;
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parse("one only\none again\ntwo first,second", g, space_p);
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return 0;
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}
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