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1 /*=============================================================================
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2 Copyright (c) 2001-2011 Joel de Guzman
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3 Copyright (c) 2001-2011 Hartmut Kaiser
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4
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5 Distributed under the Boost Software License, Version 1.0. (See accompanying
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6 file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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7 =============================================================================*/
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8 #if !defined(SPIRIT_NO_SKIP_JAN_16_2010_0802PM)
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9 #define SPIRIT_NO_SKIP_JAN_16_2010_0802PM
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10
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11 #if defined(_MSC_VER)
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12 #pragma once
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13 #endif
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14
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15 #include <boost/spirit/home/qi/meta_compiler.hpp>
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16 #include <boost/spirit/home/qi/skip_over.hpp>
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17 #include <boost/spirit/home/qi/parser.hpp>
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18 #include <boost/spirit/home/qi/detail/unused_skipper.hpp>
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19 #include <boost/spirit/home/support/unused.hpp>
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20 #include <boost/spirit/home/support/common_terminals.hpp>
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21 #include <boost/spirit/home/support/attributes.hpp>
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22 #include <boost/spirit/home/support/info.hpp>
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23 #include <boost/spirit/home/support/has_semantic_action.hpp>
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24 #include <boost/spirit/home/support/handles_container.hpp>
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25
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26 namespace boost { namespace spirit
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27 {
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28 ///////////////////////////////////////////////////////////////////////////
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29 // Enablers
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30 ///////////////////////////////////////////////////////////////////////////
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31 template <>
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32 struct use_directive<qi::domain, tag::no_skip> // enables no_skip
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33 : mpl::true_ {};
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34 }}
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35
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36 namespace boost { namespace spirit { namespace qi
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37 {
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38 #ifndef BOOST_SPIRIT_NO_PREDEFINED_TERMINALS
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39 using spirit::no_skip;
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40 #endif
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41 using spirit::no_skip_type;
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42
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43 // same as lexeme[], but does not pre-skip
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44 template <typename Subject>
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45 struct no_skip_directive : unary_parser<no_skip_directive<Subject> >
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46 {
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47 typedef Subject subject_type;
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48 no_skip_directive(Subject const& subject_)
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49 : subject(subject_) {}
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50
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51 template <typename Context, typename Iterator>
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52 struct attribute
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53 {
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54 typedef typename
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55 traits::attribute_of<subject_type, Context, Iterator>::type
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56 type;
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57 };
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58
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59 template <typename Iterator, typename Context
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60 , typename Skipper, typename Attribute>
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61 bool parse(Iterator& first, Iterator const& last
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62 , Context& context, Skipper const& skipper
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63 , Attribute& attr_) const
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64 {
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65 return subject.parse(first, last, context
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66 , detail::unused_skipper<Skipper>(skipper), attr_);
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67 }
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68
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69 template <typename Context>
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70 info what(Context& context) const
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71 {
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72 return info("no_skip", subject.what(context));
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73
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74 }
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75
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76 Subject subject;
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77 };
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78
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79 ///////////////////////////////////////////////////////////////////////////
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80 // Parser generators: make_xxx function (objects)
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81 ///////////////////////////////////////////////////////////////////////////
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82 template <typename Subject, typename Modifiers>
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83 struct make_directive<tag::no_skip, Subject, Modifiers>
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84 {
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85 typedef no_skip_directive<Subject> result_type;
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86 result_type operator()(unused_type, Subject const& subject, unused_type) const
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87 {
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88 return result_type(subject);
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89 }
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90 };
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91 }}}
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92
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93 namespace boost { namespace spirit { namespace traits
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94 {
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95 ///////////////////////////////////////////////////////////////////////////
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96 template <typename Subject>
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97 struct has_semantic_action<qi::no_skip_directive<Subject> >
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98 : unary_has_semantic_action<Subject> {};
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99
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100 ///////////////////////////////////////////////////////////////////////////
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101 template <typename Subject, typename Attribute, typename Context
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102 , typename Iterator>
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103 struct handles_container<qi::no_skip_directive<Subject>, Attribute
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104 , Context, Iterator>
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105 : unary_handles_container<Subject, Attribute, Context, Iterator> {};
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106 }}}
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107
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108 #endif
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