ceph/src/boost/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         // silence MSVC warning C4512: assignment operator could not be generated
 122         BOOST_DELETED_FUNCTION(literal_string& operator= (literal_string const&))
 123     };
 124
 125     template <typename String, bool no_attribute>
 126     struct no_case_literal_string
 127       : primitive_parser<no_case_literal_string<String, no_attribute> >
 128     {
 129         typedef typename
 130             remove_const<typename traits::char_type_of<String>::type>::type
 131         char_type;
 132         typedef std::basic_string<char_type> string_type;
 133
 134         template <typename CharEncoding>
 135         no_case_literal_string(char_type const* in, CharEncoding encoding)
 136           : str_lo(in)
 137           , str_hi(in)
 138         {
 139 #if BOOST_WORKAROUND(BOOST_MSVC, BOOST_TESTED_AT(1600))
 140             (void)encoding; // suppresses warning: C4100: 'encoding' : unreferenced formal parameter
 141 #endif
 142             typename string_type::iterator loi = str_lo.begin();
 143             typename string_type::iterator hii = str_hi.begin();
 144
 145             for (; loi != str_lo.end(); ++loi, ++hii, ++in)
 146             {
 147                 typedef typename CharEncoding::char_type encoded_char_type;
 148
 149                 *loi = static_cast<char_type>(encoding.tolower(encoded_char_type(*loi)));
 150                 *hii = static_cast<char_type>(encoding.toupper(encoded_char_type(*hii)));
 151             }
 152         }
 153
 154         template <typename Context, typename Iterator>
 155         struct attribute
 156         {
 157             typedef typename mpl::if_c<
 158                 no_attribute, unused_type, string_type>::type
 159             type;
 160         };
 161
 162         template <typename Iterator, typename Context
 163           , typename Skipper, typename Attribute>
 164         bool parse(Iterator& first, Iterator const& last
 165           , Context& /*context*/, Skipper const& skipper, Attribute& attr_) const
 166         {
 167             qi::skip_over(first, last, skipper);
 168             return detail::string_parse(str_lo, str_hi, first, last, attr_);
 169         }
 170
 171         template <typename Context>
 172         info what(Context& /*context*/) const
 173         {
 174             return info("no-case-literal-string", str_lo);
 175         }
 176
 177         string_type str_lo, str_hi;
 178     };
 179
 180     ///////////////////////////////////////////////////////////////////////////
 181     // Parser generators: make_xxx function (objects)
 182     ///////////////////////////////////////////////////////////////////////////
 183     template <typename T, typename Modifiers>
 184     struct make_primitive<T, Modifiers
 185       , typename enable_if<traits::is_string<T> >::type>
 186     {
 187         typedef has_modifier<Modifiers, tag::char_code_base<tag::no_case> > no_case;
 188
 189         typedef typename add_const<T>::type const_string;
 190         typedef typename mpl::if_<
 191             no_case
 192           , no_case_literal_string<const_string, true>
 193           , literal_string<const_string, true> >::type
 194         result_type;
 195
 196         result_type operator()(
 197             typename add_reference<const_string>::type str, unused_type) const
 198         {
 199             return op(str, no_case());
 200         }
 201
 202         template <typename String>
 203         result_type op(String const& str, mpl::false_) const
 204         {
 205             return result_type(str);
 206         }
 207
 208         template <typename String>
 209         result_type op(String const& str, mpl::true_) const
 210         {
 211             typename spirit::detail::get_encoding<Modifiers,
 212                 spirit::char_encoding::standard>::type encoding;
 213             return result_type(traits::get_c_string(str), encoding);
 214         }
 215     };
 216
 217     // lit("...")
 218     template <typename Modifiers, typename A0>
 219     struct make_primitive<
 220         terminal_ex<tag::lit, fusion::vector1<A0> >
 221       , Modifiers
 222       , typename enable_if<traits::is_string<A0> >::type>
 223     {
 224         typedef has_modifier<Modifiers, tag::char_code_base<tag::no_case> > no_case;
 225
 226         typedef typename add_const<A0>::type const_string;
 227         typedef typename mpl::if_<
 228             no_case
 229           , no_case_literal_string<const_string, true>
 230           , literal_string<const_string, true> >::type
 231         result_type;
 232
 233         template <typename Terminal>
 234         result_type operator()(Terminal const& term, unused_type) const
 235         {
 236             return op(fusion::at_c<0>(term.args), no_case());
 237         }
 238
 239         template <typename String>
 240         result_type op(String const& str, mpl::false_) const
 241         {
 242             return result_type(str);
 243         }
 244
 245         template <typename String>
 246         result_type op(String const& str, mpl::true_) const
 247         {
 248             typedef typename traits::char_encoding_from_char<
 249                 typename traits::char_type_of<A0>::type>::type encoding_type;
 250             typename spirit::detail::get_encoding<Modifiers,
 251                 encoding_type>::type encoding;
 252             return result_type(traits::get_c_string(str), encoding);
 253         }
 254     };
 255
 256     ///////////////////////////////////////////////////////////////////////////
 257     // string("...")
 258     template <typename CharEncoding, typename Modifiers, typename A0>
 259     struct make_primitive<
 260         terminal_ex<
 261             tag::char_code<tag::string, CharEncoding>
 262           , fusion::vector1<A0> >
 263       , Modifiers>
 264     {
 265         typedef CharEncoding encoding;
 266         typedef has_modifier<Modifiers, tag::char_code_base<tag::no_case> > no_case;
 267
 268         typedef typename add_const<A0>::type const_string;
 269         typedef typename mpl::if_<
 270             no_case
 271           , no_case_literal_string<const_string, false>
 272           , literal_string<const_string, false> >::type
 273         result_type;
 274
 275         template <typename Terminal>
 276         result_type operator()(Terminal const& term, unused_type) const
 277         {
 278             return op(fusion::at_c<0>(term.args), no_case());
 279         }
 280
 281         template <typename String>
 282         result_type op(String const& str, mpl::false_) const
 283         {
 284             return result_type(str);
 285         }
 286
 287         template <typename String>
 288         result_type op(String const& str, mpl::true_) const
 289         {
 290             return result_type(traits::get_c_string(str), encoding());
 291         }
 292     };
 293 }}}
 294
 295 namespace boost { namespace spirit { namespace traits
 296 {
 297     ///////////////////////////////////////////////////////////////////////////
 298     template <typename String, bool no_attribute, typename Attribute
 299       ,typename Context, typename Iterator>
 300     struct handles_container<qi::literal_string<String, no_attribute>
 301       , Attribute, Context, Iterator>
 302       : mpl::true_ {};
 303
 304     template <typename String, bool no_attribute, typename Attribute
 305       , typename Context, typename Iterator>
 306     struct handles_container<qi::no_case_literal_string<String, no_attribute>
 307       , Attribute, Context, Iterator>
 308       : mpl::true_ {};
 309 }}}
 310
 311 #endif