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/Src/Dependencies/Boost/boost/spirit/home/qi/string/lit.hpp

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C++ Header | 312 lines | 249 code | 40 blank | 23 comment | 2 complexity | 64eda9e676147aa295c457034acaa111 MD5 | raw file
  1/*=============================================================================
  2    Copyright (c) 2001-2011 Joel de Guzman
  3    Copyright (c) 2001-2011 Hartmut Kaiser
  4    Copyright (c)      2010 Bryce Lelbach
  5
  6    Distributed under the Boost Software License, Version 1.0. (See accompanying
  7    file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
  8==============================================================================*/
  9#if !defined(BOOST_SPIRIT_LIT_APR_18_2006_1125PM)
 10#define BOOST_SPIRIT_LIT_APR_18_2006_1125PM
 11
 12#if defined(_MSC_VER)
 13#pragma once
 14#endif
 15
 16#include <boost/spirit/home/qi/domain.hpp>
 17#include <boost/spirit/home/qi/skip_over.hpp>
 18#include <boost/spirit/home/qi/detail/string_parse.hpp>
 19#include <boost/spirit/home/qi/parser.hpp>
 20#include <boost/spirit/home/qi/meta_compiler.hpp>
 21#include <boost/spirit/home/qi/auxiliary/lazy.hpp>
 22#include <boost/spirit/home/qi/detail/enable_lit.hpp>
 23#include <boost/spirit/home/support/info.hpp>
 24#include <boost/spirit/home/support/char_class.hpp>
 25#include <boost/spirit/home/support/modify.hpp>
 26#include <boost/spirit/home/support/unused.hpp>
 27#include <boost/spirit/home/support/common_terminals.hpp>
 28#include <boost/spirit/home/support/string_traits.hpp>
 29#include <boost/spirit/home/support/detail/get_encoding.hpp>
 30#include <boost/spirit/home/support/handles_container.hpp>
 31#include <boost/fusion/include/at.hpp>
 32#include <boost/fusion/include/value_at.hpp>
 33#include <boost/type_traits/add_reference.hpp>
 34#include <boost/type_traits/add_const.hpp>
 35#include <boost/mpl/assert.hpp>
 36#include <boost/mpl/if.hpp>
 37#include <boost/detail/workaround.hpp>
 38#include <boost/utility/enable_if.hpp>
 39#include <string>
 40
 41namespace boost { namespace spirit
 42{
 43    ///////////////////////////////////////////////////////////////////////////
 44    // Enablers
 45    ///////////////////////////////////////////////////////////////////////////
 46    template <typename T>
 47    struct use_terminal<qi::domain, T
 48      , typename enable_if<traits::is_string<T> >::type> // enables strings
 49      : mpl::true_ {};
 50
 51    template <typename CharEncoding, typename A0>
 52    struct use_terminal<qi::domain
 53      , terminal_ex<
 54            tag::char_code<tag::string, CharEncoding>   // enables string(str)
 55          , fusion::vector1<A0> >
 56    > : traits::is_string<A0> {};
 57
 58    template <typename CharEncoding>                    // enables string(f)
 59    struct use_lazy_terminal<
 60        qi::domain
 61      , tag::char_code<tag::string, CharEncoding>
 62      , 1 /*arity*/
 63    > : mpl::true_ {};
 64
 65    // enables lit(...)
 66    template <typename A0>
 67    struct use_terminal<qi::domain
 68          , terminal_ex<tag::lit, fusion::vector1<A0> >
 69          , typename enable_if<traits::is_string<A0> >::type>
 70      : mpl::true_ {};
 71}}
 72
 73namespace boost { namespace spirit { namespace qi
 74{
 75#ifndef BOOST_SPIRIT_NO_PREDEFINED_TERMINALS
 76    using spirit::lit;
 77#endif
 78    using spirit::lit_type;
 79
 80    ///////////////////////////////////////////////////////////////////////////
 81    // Parse for literal strings
 82    ///////////////////////////////////////////////////////////////////////////
 83    template <typename String, bool no_attribute>
 84    struct literal_string
 85      : primitive_parser<literal_string<String, no_attribute> >
 86    {
 87        typedef typename
 88            remove_const<typename traits::char_type_of<String>::type>::type
 89        char_type;
 90        typedef std::basic_string<char_type> string_type;
 91
 92        literal_string(typename add_reference<String>::type str)
 93          : str(str)
 94        {}
 95
 96        template <typename Context, typename Iterator>
 97        struct attribute
 98        {
 99            typedef typename mpl::if_c<
100                no_attribute, unused_type, string_type>::type
101            type;
102        };
103
104        template <typename Iterator, typename Context
105          , typename Skipper, typename Attribute>
106        bool parse(Iterator& first, Iterator const& last
107          , Context& /*context*/, Skipper const& skipper, Attribute& attr) const
108        {
109            qi::skip_over(first, last, skipper);
110            return detail::string_parse(str, first, last, attr);
111        }
112
113        template <typename Context>
114        info what(Context& /*context*/) const
115        {
116            return info("literal-string", str);
117        }
118
119        String str;
120
121    private:
122        // silence MSVC warning C4512: assignment operator could not be generated
123        literal_string& operator= (literal_string const&);
124    };
125
126    template <typename String, bool no_attribute>
127    struct no_case_literal_string
128      : primitive_parser<no_case_literal_string<String, no_attribute> >
129    {
130        typedef typename
131            remove_const<typename traits::char_type_of<String>::type>::type
132        char_type;
133        typedef std::basic_string<char_type> string_type;
134
135        template <typename CharEncoding>
136        no_case_literal_string(char_type const* in, CharEncoding encoding)
137          : str_lo(in)
138          , str_hi(in)
139        {
140#if BOOST_WORKAROUND(BOOST_MSVC, BOOST_TESTED_AT(1600))
141            encoding; // suppresses warning: C4100: 'encoding' : unreferenced formal parameter
142#endif
143            typename string_type::iterator loi = str_lo.begin();
144            typename string_type::iterator hii = str_hi.begin();
145
146            for (; loi != str_lo.end(); ++loi, ++hii, ++in)
147            {
148                typedef typename CharEncoding::char_type encoded_char_type;
149
150                *loi = static_cast<char_type>(encoding.tolower(encoded_char_type(*loi)));
151                *hii = static_cast<char_type>(encoding.toupper(encoded_char_type(*hii)));
152            }
153        }
154
155        template <typename Context, typename Iterator>
156        struct attribute
157        {
158            typedef typename mpl::if_c<
159                no_attribute, unused_type, string_type>::type
160            type;
161        };
162
163        template <typename Iterator, typename Context
164          , typename Skipper, typename Attribute>
165        bool parse(Iterator& first, Iterator const& last
166          , Context& /*context*/, Skipper const& skipper, Attribute& attr) const
167        {
168            qi::skip_over(first, last, skipper);
169            return detail::string_parse(str_lo, str_hi, first, last, attr);
170        }
171
172        template <typename Context>
173        info what(Context& /*context*/) const
174        {
175            return info("no-case-literal-string", str_lo);
176        }
177
178        string_type str_lo, str_hi;
179    };
180
181    ///////////////////////////////////////////////////////////////////////////
182    // Parser generators: make_xxx function (objects)
183    ///////////////////////////////////////////////////////////////////////////
184    template <typename T, typename Modifiers>
185    struct make_primitive<T, Modifiers
186      , typename enable_if<traits::is_string<T> >::type>
187    {
188        typedef has_modifier<Modifiers, tag::char_code_base<tag::no_case> > no_case;
189
190        typedef typename add_const<T>::type const_string;
191        typedef typename mpl::if_<
192            no_case
193          , no_case_literal_string<const_string, true>
194          , literal_string<const_string, true> >::type
195        result_type;
196
197        result_type operator()(
198            typename add_reference<const_string>::type str, unused_type) const
199        {
200            return op(str, no_case());
201        }
202
203        template <typename String>
204        result_type op(String const& str, mpl::false_) const
205        {
206            return result_type(str);
207        }
208
209        template <typename String>
210        result_type op(String const& str, mpl::true_) const
211        {
212            typename spirit::detail::get_encoding<Modifiers,
213                spirit::char_encoding::standard>::type encoding;
214            return result_type(traits::get_c_string(str), encoding);
215        }
216    };
217
218    // lit("...")
219    template <typename Modifiers, typename A0>
220    struct make_primitive<
221        terminal_ex<tag::lit, fusion::vector1<A0> >
222      , Modifiers
223      , typename enable_if<traits::is_string<A0> >::type>
224    {
225        typedef has_modifier<Modifiers, tag::char_code_base<tag::no_case> > no_case;
226
227        typedef typename add_const<A0>::type const_string;
228        typedef typename mpl::if_<
229            no_case
230          , no_case_literal_string<const_string, true>
231          , literal_string<const_string, true> >::type
232        result_type;
233
234        template <typename Terminal>
235        result_type operator()(Terminal const& term, unused_type) const
236        {
237            return op(fusion::at_c<0>(term.args), no_case());
238        }
239
240        template <typename String>
241        result_type op(String const& str, mpl::false_) const
242        {
243            return result_type(str);
244        }
245
246        template <typename String>
247        result_type op(String const& str, mpl::true_) const
248        {
249            typedef typename traits::char_encoding_from_char<
250                typename traits::char_type_of<A0>::type>::type encoding_type;
251            typename spirit::detail::get_encoding<Modifiers,
252                encoding_type>::type encoding;
253            return result_type(traits::get_c_string(str), encoding);
254        }
255    };
256
257    ///////////////////////////////////////////////////////////////////////////
258    // string("...")
259    template <typename CharEncoding, typename Modifiers, typename A0>
260    struct make_primitive<
261        terminal_ex<
262            tag::char_code<tag::string, CharEncoding>
263          , fusion::vector1<A0> >
264      , Modifiers>
265    {
266        typedef CharEncoding encoding;
267        typedef has_modifier<Modifiers, tag::char_code_base<tag::no_case> > no_case;
268
269        typedef typename add_const<A0>::type const_string;
270        typedef typename mpl::if_<
271            no_case
272          , no_case_literal_string<const_string, false>
273          , literal_string<const_string, false> >::type
274        result_type;
275
276        template <typename Terminal>
277        result_type operator()(Terminal const& term, unused_type) const
278        {
279            return op(fusion::at_c<0>(term.args), no_case());
280        }
281
282        template <typename String>
283        result_type op(String const& str, mpl::false_) const
284        {
285            return result_type(str);
286        }
287
288        template <typename String>
289        result_type op(String const& str, mpl::true_) const
290        {
291            return result_type(traits::get_c_string(str), encoding());
292        }
293    };
294}}}
295
296namespace boost { namespace spirit { namespace traits
297{
298    ///////////////////////////////////////////////////////////////////////////
299    template <typename String, bool no_attribute, typename Attribute
300      ,typename Context, typename Iterator>
301    struct handles_container<qi::literal_string<String, no_attribute>
302      , Attribute, Context, Iterator>
303      : mpl::true_ {};
304
305    template <typename String, bool no_attribute, typename Attribute
306      , typename Context, typename Iterator>
307    struct handles_container<qi::no_case_literal_string<String, no_attribute>
308      , Attribute, Context, Iterator>
309      : mpl::true_ {};
310}}}
311
312#endif