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annotate DEPENDENCIES/generic/include/boost/spirit/home/classic/dynamic/impl/select.ipp @ 118:770eb830ec19 emscripten

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Typo fix
author Chris Cannam
date Wed, 18 May 2016 16:14:08 +0100
parents 2665513ce2d3
children
rev   line source
Chris@16 1 /*=============================================================================
Chris@16 2 Copyright (c) 2003 Hartmut Kaiser
Chris@16 3 http://spirit.sourceforge.net/
Chris@16 4
Chris@16 5 Use, modification and distribution is subject to the Boost Software
Chris@16 6 License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
Chris@16 7 http://www.boost.org/LICENSE_1_0.txt)
Chris@16 8 =============================================================================*/
Chris@16 9 #ifndef BOOST_SPIRIT_SELECT_IPP
Chris@16 10 #define BOOST_SPIRIT_SELECT_IPP
Chris@16 11
Chris@16 12 #include <boost/spirit/home/classic/core/parser.hpp>
Chris@16 13 #include <boost/spirit/home/classic/core/composite/composite.hpp>
Chris@16 14 #include <boost/spirit/home/classic/meta/as_parser.hpp>
Chris@16 15
Chris@16 16 ///////////////////////////////////////////////////////////////////////////////
Chris@16 17 namespace boost { namespace spirit {
Chris@16 18
Chris@16 19 BOOST_SPIRIT_CLASSIC_NAMESPACE_BEGIN
Chris@16 20
Chris@16 21 ///////////////////////////////////////////////////////////////////////////////
Chris@16 22 namespace impl {
Chris@16 23
Chris@16 24 ///////////////////////////////////////////////////////////////////////////////
Chris@16 25 template <typename ParserT>
Chris@16 26 struct as_embedded_parser : public as_parser<ParserT>
Chris@16 27 {
Chris@16 28 typedef typename as_parser<ParserT>::type::derived_t::embed_t type;
Chris@16 29 };
Chris@16 30
Chris@16 31 ///////////////////////////////////////////////////////////////////////////////
Chris@16 32
Chris@16 33 // no implementation here to catch unknown BehaviourT template arguments
Chris@16 34 template <typename ResultT, typename BehaviourT>
Chris@16 35 struct select_match_gen;
Chris@16 36
Chris@16 37 // implementation for the select_default_no_fail behaviour
Chris@16 38 template <typename ResultT>
Chris@16 39 struct select_match_gen<ResultT, select_default_no_fail> {
Chris@16 40
Chris@16 41 template <typename ScannerT>
Chris@16 42 static ResultT
Chris@16 43 do_ (ScannerT const &scan)
Chris@16 44 {
Chris@16 45 return scan.create_match(0, -1, scan.first, scan.first);
Chris@16 46 }
Chris@16 47 };
Chris@16 48
Chris@16 49 // implementation for the select_default_fail behaviour
Chris@16 50 template <typename ResultT>
Chris@16 51 struct select_match_gen<ResultT, select_default_fail> {
Chris@16 52
Chris@16 53 template <typename ScannerT>
Chris@16 54 static ResultT
Chris@16 55 do_ (ScannerT const &scan)
Chris@16 56 {
Chris@16 57 return scan.no_match();
Chris@16 58 }
Chris@16 59 };
Chris@16 60
Chris@16 61 ///////////////////////////////////////////////////////////////////////////////
Chris@16 62 template <int N, typename ResultT, typename TupleT, typename BehaviourT>
Chris@16 63 struct parse_tuple_element {
Chris@16 64
Chris@16 65 BOOST_STATIC_CONSTANT(int, index = (TupleT::length - N));
Chris@16 66
Chris@16 67 template <typename ScannerT>
Chris@16 68 static ResultT
Chris@16 69 do_(TupleT const &t, ScannerT const &scan)
Chris@16 70 {
Chris@16 71 typedef typename ::phoenix::tuple_element<index, TupleT>::type parser_t;
Chris@16 72 typedef typename ScannerT::iterator_t iterator_t;
Chris@16 73 typedef typename parser_result<parser_t, ScannerT>::type result_t;
Chris@16 74
Chris@16 75 iterator_t save(scan.first);
Chris@16 76 result_t result(t[::phoenix::tuple_index<index>()].parse(scan));
Chris@16 77
Chris@16 78 if (result) {
Chris@16 79 return scan.create_match(result.length(), TupleT::length - N,
Chris@16 80 save, scan.first);
Chris@16 81 }
Chris@16 82 scan.first = save; // reset the input stream
Chris@16 83 return parse_tuple_element<N-1, ResultT, TupleT, BehaviourT>::
Chris@16 84 do_(t, scan);
Chris@16 85 }
Chris@16 86 };
Chris@16 87
Chris@16 88 template <typename ResultT, typename TupleT, typename BehaviourT>
Chris@16 89 struct parse_tuple_element<1, ResultT, TupleT, BehaviourT> {
Chris@16 90
Chris@16 91 BOOST_STATIC_CONSTANT(int, index = (TupleT::length - 1));
Chris@16 92
Chris@16 93 template <typename ScannerT>
Chris@16 94 static ResultT
Chris@16 95 do_(TupleT const &t, ScannerT const &scan)
Chris@16 96 {
Chris@16 97 typedef typename ::phoenix::tuple_element<index, TupleT>::type parser_t;
Chris@16 98 typedef typename ScannerT::iterator_t iterator_t;
Chris@16 99 typedef typename parser_result<parser_t, ScannerT>::type result_t;
Chris@16 100
Chris@16 101 iterator_t save(scan.first);
Chris@16 102 result_t result(t[::phoenix::tuple_index<index>()].parse(scan));
Chris@16 103
Chris@16 104 if (result) {
Chris@16 105 return scan.create_match(result.length(), TupleT::length - 1,
Chris@16 106 save, scan.first);
Chris@16 107 }
Chris@16 108 scan.first = save; // reset the input stream
Chris@16 109 return select_match_gen<ResultT, BehaviourT>::do_(scan);
Chris@16 110 }
Chris@16 111 };
Chris@16 112
Chris@16 113 ///////////////////////////////////////////////////////////////////////////////
Chris@16 114 } // namespace impl
Chris@16 115
Chris@16 116 BOOST_SPIRIT_CLASSIC_NAMESPACE_END
Chris@16 117
Chris@16 118 }} // namespace boost::spirit
Chris@16 119
Chris@16 120 #endif // BOOST_SPIRIT_SELECT_IPP