/*=============================================================================
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Copyright (c) 2002-2003 Hartmut Kaiser
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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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#ifndef BOOST_SPIRIT_LISTS_IPP
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#define BOOST_SPIRIT_LISTS_IPP
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///////////////////////////////////////////////////////////////////////////////
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#include <boost/spirit/home/classic/meta/refactoring.hpp>
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///////////////////////////////////////////////////////////////////////////////
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namespace boost { namespace spirit {
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BOOST_SPIRIT_CLASSIC_NAMESPACE_BEGIN
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///////////////////////////////////////////////////////////////////////////////
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//
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// list_parser_type class implementation
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//
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///////////////////////////////////////////////////////////////////////////////
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struct no_list_endtoken { typedef no_list_endtoken embed_t; };
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namespace impl {
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///////////////////////////////////////////////////////////////////////////////
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//
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// Refactor the original list item parser
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//
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///////////////////////////////////////////////////////////////////////////////
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// match list with 'extended' syntax
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template <typename EndT>
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struct select_list_parse_refactor {
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template <
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typename ParserT, typename ScannerT,
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typename ItemT, typename DelimT
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>
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static typename parser_result<ParserT, ScannerT>::type
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parse(ScannerT const& scan, ParserT const& /*p*/,
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ItemT const &item, DelimT const &delim, EndT const &end)
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{
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typedef refactor_action_gen<refactor_unary_gen<> > refactor_t;
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const refactor_t refactor_item_d = refactor_t(refactor_unary_d);
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return (
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refactor_item_d[item - (end | delim)]
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>> *(delim >> refactor_item_d[item - (end | delim)])
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>> !(delim >> end)
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).parse(scan);
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}
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};
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// match list with 'normal' syntax (without an 'end' parser)
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template <>
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struct select_list_parse_refactor<no_list_endtoken> {
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template <
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typename ParserT, typename ScannerT,
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typename ItemT, typename DelimT
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>
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static typename parser_result<ParserT, ScannerT>::type
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parse(ScannerT const& scan, ParserT const& /*p*/,
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ItemT const &item, DelimT const &delim, no_list_endtoken const&)
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{
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typedef refactor_action_gen<refactor_unary_gen<> > refactor_t;
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const refactor_t refactor_item_d = refactor_t(refactor_unary_d);
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return (
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refactor_item_d[item - delim]
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>> *(delim >> refactor_item_d[item - delim])
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).parse(scan);
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}
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};
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///////////////////////////////////////////////////////////////////////////////
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//
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// Do not refactor the original list item parser.
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//
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///////////////////////////////////////////////////////////////////////////////
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// match list with 'extended' syntax
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template <typename EndT>
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struct select_list_parse_no_refactor {
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template <
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typename ParserT, typename ScannerT,
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typename ItemT, typename DelimT
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>
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static typename parser_result<ParserT, ScannerT>::type
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parse(ScannerT const& scan, ParserT const& /*p*/,
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ItemT const &item, DelimT const &delim, EndT const &end)
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{
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return (
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(item - (end | delim))
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>> *(delim >> (item - (end | delim)))
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>> !(delim >> end)
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).parse(scan);
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}
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};
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// match list with 'normal' syntax (without an 'end' parser)
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template <>
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struct select_list_parse_no_refactor<no_list_endtoken> {
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template <
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typename ParserT, typename ScannerT,
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typename ItemT, typename DelimT
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>
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static typename parser_result<ParserT, ScannerT>::type
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parse(ScannerT const& scan, ParserT const& /*p*/,
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ItemT const &item, DelimT const &delim, no_list_endtoken const&)
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{
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return (
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(item - delim)
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>> *(delim >> (item - delim))
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).parse(scan);
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}
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};
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// the refactoring is handled by the refactoring parsers, so here there
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// is no need to pay attention to these issues.
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template <typename CategoryT>
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struct list_parser_type {
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template <
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typename ParserT, typename ScannerT,
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typename ItemT, typename DelimT, typename EndT
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>
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static typename parser_result<ParserT, ScannerT>::type
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parse(ScannerT const& scan, ParserT const& p,
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ItemT const &item, DelimT const &delim, EndT const &end)
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{
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return select_list_parse_refactor<EndT>::
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parse(scan, p, item, delim, end);
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}
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};
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template <>
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struct list_parser_type<plain_parser_category> {
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template <
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typename ParserT, typename ScannerT,
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typename ItemT, typename DelimT, typename EndT
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>
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static typename parser_result<ParserT, ScannerT>::type
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parse(ScannerT const& scan, ParserT const& p,
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ItemT const &item, DelimT const &delim, EndT const &end)
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{
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return select_list_parse_no_refactor<EndT>::
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parse(scan, p, item, delim, end);
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}
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};
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} // namespace impl
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///////////////////////////////////////////////////////////////////////////////
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BOOST_SPIRIT_CLASSIC_NAMESPACE_END
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}} // namespace boost::spirit
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#endif
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