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

   1 /*=============================================================================
   2     Copyright (c) 2001-2011 Joel de Guzman
   3
   4     Distributed under the Boost Software License, Version 1.0. (See accompanying
   5     file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
   6 ==============================================================================*/
   7 #if !defined(BOOST_SPIRIT_SYMBOLS_MARCH_11_2007_1055AM)
   8 #define BOOST_SPIRIT_SYMBOLS_MARCH_11_2007_1055AM
   9
  10 #if defined(_MSC_VER)
  11 #pragma once
  12 #endif
  13
  14 #include <boost/spirit/home/qi/domain.hpp>
  15 #include <boost/spirit/home/qi/skip_over.hpp>
  16 #include <boost/spirit/home/qi/string/tst.hpp>
  17 #include <boost/spirit/home/qi/reference.hpp>
  18 #include <boost/spirit/home/qi/meta_compiler.hpp>
  19 #include <boost/spirit/home/qi/detail/assign_to.hpp>
  20 #include <boost/spirit/home/qi/parser.hpp>
  21 #include <boost/spirit/home/support/detail/get_encoding.hpp>
  22 #include <boost/spirit/home/support/modify.hpp>
  23 #include <boost/spirit/home/support/info.hpp>
  24 #include <boost/spirit/home/support/unused.hpp>
  25 #include <boost/spirit/home/support/string_traits.hpp>
  26
  27 #include <boost/fusion/include/at.hpp>
  28 #include <boost/range.hpp>
  29 #include <boost/type_traits/add_reference.hpp>
  30 #include <boost/shared_ptr.hpp>
  31
  32 #if defined(BOOST_MSVC)
  33 # pragma warning(push)
  34 # pragma warning(disable: 4355) // 'this' : used in base member initializer list warning
  35 #endif
  36
  37 namespace boost { namespace spirit { namespace qi
  38 {
  39     template <
  40         typename Char = char
  41       , typename T = unused_type
  42       , typename Lookup = tst<Char, T>
  43       , typename Filter = tst_pass_through>
  44     struct symbols
  45       : proto::extends<
  46             typename proto::terminal<
  47                 reference<symbols<Char, T, Lookup, Filter> >
  48             >::type
  49           , symbols<Char, T, Lookup, Filter>
  50         >
  51       , primitive_parser<symbols<Char, T, Lookup, Filter> >
  52     {
  53         typedef Char char_type; // the character type
  54         typedef T value_type; // the value associated with each entry
  55         typedef symbols<Char, T, Lookup, Filter> this_type;
  56         typedef reference<this_type> reference_;
  57         typedef typename proto::terminal<reference_>::type terminal;
  58         typedef proto::extends<terminal, this_type> base_type;
  59
  60         template <typename Context, typename Iterator>
  61         struct attribute
  62         {
  63             typedef value_type type;
  64         };
  65
  66         symbols(std::string const& name = "symbols")
  67           : base_type(terminal::make(reference_(*this)))
  68           , add(*this)
  69           , remove(*this)
  70           , lookup(new Lookup())
  71           , name_(name)
  72         {
  73         }
  74
  75         symbols(symbols const& syms)
  76           : base_type(terminal::make(reference_(*this)))
  77           , add(*this)
  78           , remove(*this)
  79           , lookup(syms.lookup)
  80           , name_(syms.name_)
  81         {
  82         }
  83
  84         template <typename Filter_>
  85         symbols(symbols<Char, T, Lookup, Filter_> const& syms)
  86           : base_type(terminal::make(reference_(*this)))
  87           , add(*this)
  88           , remove(*this)
  89           , lookup(syms.lookup)
  90           , name_(syms.name_)
  91         {
  92         }
  93
  94         template <typename Symbols>
  95         symbols(Symbols const& syms, std::string const& name = "symbols")
  96           : base_type(terminal::make(reference_(*this)))
  97           , add(*this)
  98           , remove(*this)
  99           , lookup(new Lookup())
 100           , name_(name)
 101         {
 102             typename range_const_iterator<Symbols>::type si = boost::begin(syms);
 103             while (si != boost::end(syms))
 104                 add(*si++);
 105         }
 106
 107         template <typename Symbols, typename Data>
 108         symbols(Symbols const& syms, Data const& data
 109               , std::string const& name = "symbols")
 110           : base_type(terminal::make(reference_(*this)))
 111           , add(*this)
 112           , remove(*this)
 113           , lookup(new Lookup())
 114           , name_(name)
 115         {
 116             typename range_const_iterator<Symbols>::type si = boost::begin(syms);
 117             typename range_const_iterator<Data>::type di = boost::begin(data);
 118             while (si != boost::end(syms))
 119                 add(*si++, *di++);
 120         }
 121
 122         symbols&
 123         operator=(symbols const& rhs)
 124         {
 125             name_ = rhs.name_;
 126             *lookup = *rhs.lookup;
 127             return *this;
 128         }
 129
 130         template <typename Filter_>
 131         symbols&
 132         operator=(symbols<Char, T, Lookup, Filter_> const& rhs)
 133         {
 134             name_ = rhs.name_;
 135             *lookup = *rhs.lookup;
 136             return *this;
 137         }
 138
 139         void clear()
 140         {
 141             lookup->clear();
 142         }
 143
 144         struct adder;
 145         struct remover;
 146
 147         template <typename Str>
 148         adder const&
 149         operator=(Str const& str)
 150         {
 151             lookup->clear();
 152             return add(str);
 153         }
 154
 155         template <typename Str>
 156         friend adder const&
 157         operator+=(symbols& sym, Str const& str)
 158         {
 159             return sym.add(str);
 160         }
 161
 162         template <typename Str>
 163         friend remover const&
 164         operator-=(symbols& sym, Str const& str)
 165         {
 166             return sym.remove(str);
 167         }
 168
 169 #if defined(BOOST_NO_CXX11_RVALUE_REFERENCES)
 170         // non-const version needed to suppress proto's += kicking in
 171         template <typename Str>
 172         friend adder const&
 173         operator+=(symbols& sym, Str& str)
 174         {
 175             return sym.add(str);
 176         }
 177
 178         // non-const version needed to suppress proto's -= kicking in
 179         template <typename Str>
 180         friend remover const&
 181         operator-=(symbols& sym, Str& str)
 182         {
 183             return sym.remove(str);
 184         }
 185 #else
 186         // for rvalue references
 187         template <typename Str>
 188         friend adder const&
 189         operator+=(symbols& sym, Str&& str)
 190         {
 191             return sym.add(str);
 192         }
 193
 194         // for rvalue references
 195         template <typename Str>
 196         friend remover const&
 197         operator-=(symbols& sym, Str&& str)
 198         {
 199             return sym.remove(str);
 200         }
 201 #endif
 202         template <typename F>
 203         void for_each(F f) const
 204         {
 205             lookup->for_each(f);
 206         }
 207
 208         template <typename Str>
 209         value_type& at(Str const& str)
 210         {
 211             return *lookup->add(traits::get_begin<Char>(str)
 212                 , traits::get_end<Char>(str), T());
 213         }
 214
 215         template <typename Iterator>
 216         value_type* prefix_find(Iterator& first, Iterator const& last)
 217         {
 218             return lookup->find(first, last, Filter());
 219         }
 220
 221         template <typename Iterator>
 222         value_type const* prefix_find(Iterator& first, Iterator const& last) const
 223         {
 224             return lookup->find(first, last, Filter());
 225         }
 226
 227         template <typename Str>
 228         value_type* find(Str const& str)
 229         {
 230             return find_impl(traits::get_begin<Char>(str)
 231                 , traits::get_end<Char>(str));
 232         }
 233
 234         template <typename Str>
 235         value_type const* find(Str const& str) const
 236         {
 237             return find_impl(traits::get_begin<Char>(str)
 238                 , traits::get_end<Char>(str));
 239         }
 240
 241 private:
 242         template <typename Iterator>
 243         value_type* find_impl(Iterator begin, Iterator end)
 244         {
 245             value_type* r = lookup->find(begin, end, Filter());
 246             return begin == end ? r : 0;
 247         }
 248
 249         template <typename Iterator>
 250         value_type const* find_impl(Iterator begin, Iterator end) const
 251         {
 252             value_type const* r = lookup->find(begin, end, Filter());
 253             return begin == end ? r : 0;
 254         }
 255
 256 public:
 257         template <typename Iterator, typename Context
 258           , typename Skipper, typename Attribute>
 259         bool parse(Iterator& first, Iterator const& last
 260           , Context& /*context*/, Skipper const& skipper, Attribute& attr_) const
 261         {
 262             qi::skip_over(first, last, skipper);
 263
 264             if (value_type* val_ptr
 265                 = lookup->find(first, last, Filter()))
 266             {
 267                 spirit::traits::assign_to(*val_ptr, attr_);
 268                 return true;
 269             }
 270             return false;
 271         }
 272
 273         template <typename Context>
 274         info what(Context& /*context*/) const
 275         {
 276             return info(name_);
 277         }
 278
 279         void name(std::string const &str)
 280         {
 281             name_ = str;
 282         }
 283         std::string const &name() const
 284         {
 285             return name_;
 286         }
 287
 288         struct adder
 289         {
 290             template <typename, typename = unused_type, typename = unused_type>
 291             struct result { typedef adder const& type; };
 292
 293             adder(symbols& sym_)
 294               : sym(sym_)
 295             {
 296             }
 297
 298             template <typename Iterator>
 299             adder const&
 300             operator()(Iterator const& first, Iterator const& last, T const& val) const
 301             {
 302                 sym.lookup->add(first, last, val);
 303                 return *this;
 304             }
 305
 306             template <typename Str>
 307             adder const&
 308             operator()(Str const& s, T const& val = T()) const
 309             {
 310                 sym.lookup->add(traits::get_begin<Char>(s)
 311                   , traits::get_end<Char>(s), val);
 312                 return *this;
 313             }
 314
 315             template <typename Str>
 316             adder const&
 317             operator,(Str const& s) const
 318             {
 319                 sym.lookup->add(traits::get_begin<Char>(s)
 320                   , traits::get_end<Char>(s), T());
 321                 return *this;
 322             }
 323
 324             symbols& sym;
 325
 326         private:
 327             // silence MSVC warning C4512: assignment operator could not be generated
 328             adder& operator= (adder const&);
 329         };
 330
 331         struct remover
 332         {
 333             template <typename, typename = unused_type, typename = unused_type>
 334             struct result { typedef remover const& type; };
 335
 336             remover(symbols& sym_)
 337               : sym(sym_)
 338             {
 339             }
 340
 341             template <typename Iterator>
 342             remover const&
 343             operator()(Iterator const& first, Iterator const& last) const
 344             {
 345                 sym.lookup->remove(first, last);
 346                 return *this;
 347             }
 348
 349             template <typename Str>
 350             remover const&
 351             operator()(Str const& s) const
 352             {
 353                 sym.lookup->remove(traits::get_begin<Char>(s)
 354                   , traits::get_end<Char>(s));
 355                 return *this;
 356             }
 357
 358             template <typename Str>
 359             remover const&
 360             operator,(Str const& s) const
 361             {
 362                 sym.lookup->remove(traits::get_begin<Char>(s)
 363                   , traits::get_end<Char>(s));
 364                 return *this;
 365             }
 366
 367             symbols& sym;
 368
 369         private:
 370             // silence MSVC warning C4512: assignment operator could not be generated
 371             remover& operator= (remover const&);
 372         };
 373
 374         adder add;
 375         remover remove;
 376         shared_ptr<Lookup> lookup;
 377         std::string name_;
 378     };
 379
 380     ///////////////////////////////////////////////////////////////////////////
 381     // Parser generators: make_xxx function (objects)
 382     ///////////////////////////////////////////////////////////////////////////
 383     template <typename Char, typename T, typename Lookup
 384       , typename Filter, typename Modifiers>
 385     struct make_primitive<reference<symbols<Char, T, Lookup, Filter> >, Modifiers>
 386     {
 387         template <typename CharEncoding>
 388         struct no_case_filter
 389         {
 390             Char operator()(Char ch) const
 391             {
 392                 return static_cast<Char>(CharEncoding::tolower(ch));
 393             }
 394         };
 395
 396         typedef has_modifier<Modifiers, tag::char_code_base<tag::no_case> > no_case;
 397         typedef reference<symbols<Char, T, Lookup, Filter> > reference_;
 398         typedef no_case_filter<
 399             typename spirit::detail::get_encoding_with_case<
 400                 Modifiers
 401               , char_encoding::standard
 402               , no_case::value>::type>
 403         nc_filter;
 404
 405         typedef typename mpl::if_<
 406             no_case
 407           , symbols<Char, T, Lookup, nc_filter>
 408           , reference_>::type
 409         result_type;
 410
 411         result_type operator()(reference_ ref, unused_type) const
 412         {
 413             return result_type(ref.ref.get());
 414         }
 415     };
 416 }}}
 417
 418 namespace boost { namespace spirit { namespace traits
 419 {
 420     ///////////////////////////////////////////////////////////////////////////
 421     template <typename Char, typename T, typename Lookup, typename Filter
 422       , typename Attr, typename Context, typename Iterator>
 423     struct handles_container<qi::symbols<Char, T, Lookup, Filter>, Attr, Context, Iterator>
 424       : traits::is_container<Attr> {};
 425 }}}
 426
 427 #if defined(BOOST_MSVC)
 428 # pragma warning(pop)
 429 #endif
 430
 431 #endif