diff -r 000000000000 -r bde4ae8d615e os/ossrv/ossrv_pub/boost_apis/boost/spirit/dynamic/while.hpp --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/os/ossrv/ossrv_pub/boost_apis/boost/spirit/dynamic/while.hpp Fri Jun 15 03:10:57 2012 +0200 @@ -0,0 +1,185 @@ +/*============================================================================= + Copyright (c) 2002-2003 Joel de Guzman + Copyright (c) 2002-2003 Martin Wille + 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) +=============================================================================*/ +#ifndef BOOST_SPIRIT_WHILE_HPP +#define BOOST_SPIRIT_WHILE_HPP + +#include +#include +#include + +//////////////////////////////////////////////////////////////////////////////// +namespace boost { namespace spirit { + + namespace impl { + + ////////////////////////////////// + // while parser + // object are created by while_parser_gen and do_parser_gen + template + struct while_parser + : public condition_evaluator< typename as_parser::type > + , public unary // the parent stores a copy of the body parser + < + typename as_parser::type, + parser > + > + { + typedef while_parser self_t; + + typedef as_parser as_parser_t; + typedef typename as_parser_t::type parser_t; + typedef as_parser cond_as_parser_t; + typedef typename cond_as_parser_t::type condition_t; + + typedef unary > base_t; + typedef condition_evaluator eval_t; + + + ////////////////////////////// + // constructor, saves condition and body parser + while_parser(ParsableT const &body, CondT const &cond) + : eval_t(cond_as_parser_t::convert(cond)) + , base_t(as_parser_t::convert(body)) + {} + + ////////////////////////////// + // result type computer. + template + struct result + { + typedef typename match_result + ::type type; + }; + + ////////////////////////////// + // parse member function + template + typename parser_result::type + parse(ScannerT const& scan) const + { + typedef typename parser_result::type sresult_t; + typedef typename ScannerT::iterator_t iterator_t; + + iterator_t save(scan.first); + std::size_t length = 0; + int eval_length = 0; + + bool dont_check_condition = is_do_parser; + + while (dont_check_condition || (eval_length=this->evaluate(scan))>=0) + { + dont_check_condition = false; + length += eval_length; + sresult_t tmp(this->subject().parse(scan)); + if (tmp) + { + length+=tmp.length(); + } + else + { + return scan.no_match(); + } + } + return scan.create_match(length, nil_t(), save, scan.first); + } + }; + + ////////////////////////////////// + // while-parser generator, takes the body-parser in brackets + // and returns the actual while-parser. + template + struct while_parser_gen + { + ////////////////////////////// + // constructor, saves the condition for use by operator[] + while_parser_gen(CondT const& cond_) : cond(cond_) {} + + ////////////////////////////// + // operator[] returns the actual while-parser object + template + while_parser + operator[](ParsableT const &subject) const + { + return while_parser(subject, cond); + } + private: + + ////////////////////////////// + // the condition is stored by reference here. + // this should not cause any harm since object of type + // while_parser_gen<> are only used as temporaries + // the while-parser object constructed by the operator[] + // stores a copy of the condition. + CondT const &cond; + }; + + ////////////////////////////////// + // do-while-parser generator, takes the condition as + // parameter to while_p member function and returns the + // actual do-while-parser. + template + struct do_while_parser_gen + { + ////////////////////////////// + // constructor. saves the body parser for use by while_p. + explicit do_while_parser_gen(ParsableT const &body_parser) + : body(body_parser) + {} + + ////////////////////////////// + // while_p returns the actual while-parser object + template + while_parser + while_p(CondT cond) const + { + return while_parser(body, cond); + } + private: + + ////////////////////////////// + // the body is stored by reference here + // this should not cause any harm since object of type + // do_while_parser_gen<> are only used as temporaries + // the while-parser object constructed by the while_p + // member function stores a copy of the body parser. + ParsableT const &body; + }; + + struct do_parser_gen + { + inline do_parser_gen() {} + + template + impl::do_while_parser_gen + operator[](ParsableT const& body) const + { + return impl::do_while_parser_gen(body); + } + }; +} // namespace impl + +////////////////////////////////// +// while_p function, while-parser generator +// Usage: spirit::while_p(Condition)[Body] +template +impl::while_parser_gen +while_p(CondT const& cond) +{ + return impl::while_parser_gen(cond); +} + +////////////////////////////////// +// do_p functor, do-while-parser generator +// Usage: spirit::do_p[Body].while_p(Condition) +impl::do_parser_gen const do_p = impl::do_parser_gen(); + +}} // namespace boost::spirit + +#endif // BOOST_SPIRIT_WHILE_HPP