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Diffstat (limited to '3rdParty/Boost/src/boost/spirit/home/classic/core/scanner/impl/skipper.ipp')
| -rw-r--r-- | 3rdParty/Boost/src/boost/spirit/home/classic/core/scanner/impl/skipper.ipp | 181 |
1 files changed, 181 insertions, 0 deletions
diff --git a/3rdParty/Boost/src/boost/spirit/home/classic/core/scanner/impl/skipper.ipp b/3rdParty/Boost/src/boost/spirit/home/classic/core/scanner/impl/skipper.ipp new file mode 100644 index 0000000..fab74bd --- /dev/null +++ b/3rdParty/Boost/src/boost/spirit/home/classic/core/scanner/impl/skipper.ipp @@ -0,0 +1,181 @@ +/*============================================================================= + Copyright (c) 1998-2003 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) +============================================================================*/ +#if !defined(BOOST_SPIRIT_SKIPPER_IPP) +#define BOOST_SPIRIT_SKIPPER_IPP + +/////////////////////////////////////////////////////////////////////////////// +namespace boost { namespace spirit { + +BOOST_SPIRIT_CLASSIC_NAMESPACE_BEGIN + + struct space_parser; + template <typename BaseT> + struct no_skipper_iteration_policy; + + namespace impl + { + template <typename ST, typename ScannerT, typename BaseT> + inline void + skipper_skip( + ST const& s, + ScannerT const& scan, + skipper_iteration_policy<BaseT> const&) + { + typedef scanner_policies< + no_skipper_iteration_policy< + BOOST_DEDUCED_TYPENAME ScannerT::iteration_policy_t>, + BOOST_DEDUCED_TYPENAME ScannerT::match_policy_t, + BOOST_DEDUCED_TYPENAME ScannerT::action_policy_t + > policies_t; + + scanner<BOOST_DEDUCED_TYPENAME ScannerT::iterator_t, policies_t> + scan2(scan.first, scan.last, policies_t(scan)); + typedef typename ScannerT::iterator_t iterator_t; + + for (;;) + { + iterator_t save = scan.first; + if (!s.parse(scan2)) + { + scan.first = save; + break; + } + } + } + + template <typename ST, typename ScannerT, typename BaseT> + inline void + skipper_skip( + ST const& s, + ScannerT const& scan, + no_skipper_iteration_policy<BaseT> const&) + { + for (;;) + { + typedef typename ScannerT::iterator_t iterator_t; + iterator_t save = scan.first; + if (!s.parse(scan)) + { + scan.first = save; + break; + } + } + } + + template <typename ST, typename ScannerT> + inline void + skipper_skip( + ST const& s, + ScannerT const& scan, + iteration_policy const&) + { + for (;;) + { + typedef typename ScannerT::iterator_t iterator_t; + iterator_t save = scan.first; + if (!s.parse(scan)) + { + scan.first = save; + break; + } + } + } + + template <typename SkipT> + struct phrase_parser + { + template <typename IteratorT, typename ParserT> + static parse_info<IteratorT> + parse( + IteratorT const& first_, + IteratorT const& last, + ParserT const& p, + SkipT const& skip) + { + typedef skip_parser_iteration_policy<SkipT> iter_policy_t; + typedef scanner_policies<iter_policy_t> scanner_policies_t; + typedef scanner<IteratorT, scanner_policies_t> scanner_t; + + iter_policy_t iter_policy(skip); + scanner_policies_t policies(iter_policy); + IteratorT first = first_; + scanner_t scan(first, last, policies); + match<nil_t> hit = p.parse(scan); + return parse_info<IteratorT>( + first, hit, hit && (first == last), + hit.length()); + } + }; + + template <> + struct phrase_parser<space_parser> + { + template <typename IteratorT, typename ParserT> + static parse_info<IteratorT> + parse( + IteratorT const& first_, + IteratorT const& last, + ParserT const& p, + space_parser const&) + { + typedef skipper_iteration_policy<> iter_policy_t; + typedef scanner_policies<iter_policy_t> scanner_policies_t; + typedef scanner<IteratorT, scanner_policies_t> scanner_t; + + IteratorT first = first_; + scanner_t scan(first, last); + match<nil_t> hit = p.parse(scan); + return parse_info<IteratorT>( + first, hit, hit && (first == last), + hit.length()); + } + }; + } + + /////////////////////////////////////////////////////////////////////////// + // + // Free parse functions using the skippers + // + /////////////////////////////////////////////////////////////////////////// + template <typename IteratorT, typename ParserT, typename SkipT> + inline parse_info<IteratorT> + parse( + IteratorT const& first, + IteratorT const& last, + parser<ParserT> const& p, + parser<SkipT> const& skip) + { + return impl::phrase_parser<SkipT>:: + parse(first, last, p.derived(), skip.derived()); + } + + /////////////////////////////////////////////////////////////////////////// + // + // Parse function for null terminated strings using the skippers + // + /////////////////////////////////////////////////////////////////////////// + template <typename CharT, typename ParserT, typename SkipT> + inline parse_info<CharT const*> + parse( + CharT const* str, + parser<ParserT> const& p, + parser<SkipT> const& skip) + { + CharT const* last = str; + while (*last) + last++; + return parse(str, last, p, skip); + } + +BOOST_SPIRIT_CLASSIC_NAMESPACE_END + +}} // namespace boost::spirit + +#endif + |