ceph/src/boost/libs/spirit/include/boost/spirit/home/qi/string/lit.hpp

   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
  41 namespace 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
  73 namespace 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
 296 namespace 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