Source

GL Profile Suite / boost_1_51_0 / boost / range / detail / collection_traits_detail.hpp

  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
//  Boost string_algo library collection_traits.hpp header file  -----------------------//

//  Copyright Pavol Droba 2002-2003. Use, modification and
//  distribution is subject to the Boost Software License, Version
//  1.0. (See accompanying file LICENSE_1_0.txt or copy at
//  http://www.boost.org/LICENSE_1_0.txt)

//  See http://www.boost.org for updates, documentation, and revision history.

#ifndef BOOST_RANGE_STRING_DETAIL_COLLECTION_TRAITS_HPP
#define BOOST_RANGE_STRING_DETAIL_COLLECTION_TRAITS_HPP

#include <boost/algorithm/string/config.hpp>
#include <cstddef>
#include <string>
#include <boost/type_traits/is_array.hpp>
#include <boost/type_traits/is_pointer.hpp>
#include <boost/type_traits/is_const.hpp>
#include <boost/type_traits/is_convertible.hpp>
#include <boost/type_traits/remove_pointer.hpp>
#include <boost/type_traits/remove_cv.hpp>
#include <boost/mpl/eval_if.hpp>
#include <boost/mpl/identity.hpp>
#include <boost/mpl/vector.hpp>
#include <boost/mpl/fold.hpp>
#include <boost/detail/iterator.hpp>
#include <boost/algorithm/string/yes_no_type.hpp>

// Container traits implementation ---------------------------------------------------------

namespace boost {
    namespace algorithm {
        namespace detail {

// Default collection traits -----------------------------------------------------------------

            // Default collection helper 
            /*
                Wraps std::container compliant containers
            */
            template< typename ContainerT >     
            struct default_container_traits
            {
                typedef BOOST_STRING_TYPENAME ContainerT::value_type value_type;
                typedef BOOST_STRING_TYPENAME ContainerT::iterator iterator;
                typedef BOOST_STRING_TYPENAME ContainerT::const_iterator const_iterator;
                typedef BOOST_STRING_TYPENAME 
                    ::boost::mpl::if_< ::boost::is_const<ContainerT>,
                        const_iterator,
                        iterator 
                    >::type result_iterator;
                typedef BOOST_STRING_TYPENAME ContainerT::difference_type difference_type;
                typedef BOOST_STRING_TYPENAME ContainerT::size_type size_type;
                
                // static operations
                template< typename C >
                static size_type size( const C& c )
                {
                    return c.size();
                }

                template< typename C >
                static bool empty( const C& c )
                {
                    return c.empty();
                }

#ifndef BOOST_NO_FUNCTION_TEMPLATE_ORDERING

                template< typename C >
                static iterator begin( C& c )
                {
                    return c.begin();
                }

                template< typename C >
                static const_iterator begin( const C& c )
                {
                    return c.begin();
                }

                template< typename C >
                static iterator end( C& c )
                {
                    return c.end();
                }

                template< typename C >
                static const_iterator end( const C& c )
                {
                    return c.end();
                }

#else // BOOST_NO_FUNCTION_TEMPLATE_ORDERING

                template< typename C >
                static result_iterator begin( C& c )
                {
                    return c.begin();
                }

                template< typename C >
                static result_iterator end( C& c )
                {
                    return c.end();
                }

#endif // BOOST_NO_FUNCTION_TEMPLATE_ORDERING    

            }; 

            template<typename T>
            struct default_container_traits_selector
            {
                typedef default_container_traits<T> type;
            };

// Pair container traits ---------------------------------------------------------------------
                    
            // pair selector
            template< typename T, typename U >
            yes_type is_pair_impl( const std::pair<T,U>* );
            no_type is_pair_impl( ... );

            template<typename T> struct is_pair
            {
            private:
                static T* t;
            public:
                BOOST_STATIC_CONSTANT( bool, value=
                    sizeof(is_pair_impl(t))==sizeof(yes_type) );
            };

            // pair helper
            template< typename PairT >
            struct pair_container_traits
            {
                typedef BOOST_STRING_TYPENAME PairT::first_type element_type;

                typedef BOOST_STRING_TYPENAME ::boost::detail::
                    iterator_traits<element_type>::value_type value_type;
                typedef std::size_t size_type;
                typedef BOOST_STRING_TYPENAME ::boost::detail::
                    iterator_traits<element_type>::difference_type difference_type;

                typedef element_type iterator;
                typedef element_type const_iterator;
                typedef element_type result_iterator;

                // static operations
                template< typename P >
                static size_type size( const P& p )
                {
                    difference_type diff = std::distance( p.first, p.second );
                    if ( diff < 0 ) 
                        return 0;
                    else
                        return diff;
                }

                template< typename P >
                static bool empty( const P& p )
                {
                    return p.first==p.second;
                }

                template< typename P > 
                static const_iterator begin( const P& p )
                {
                    return p.first;
                }

                template< typename P >
                static const_iterator end( const P& p )
                {
                    return p.second;
                }
            }; // 'pair_container_helper'

            template<typename T>
            struct pair_container_traits_selector
            {
                typedef pair_container_traits<T> type;
            };

// Array container traits ---------------------------------------------------------------

#ifndef BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
            // array traits ( partial specialization )
            template< typename T >
            struct array_traits;

            template< typename T, std::size_t sz >
            struct array_traits<T[sz]>
            {
                // typedef
                typedef T* iterator;
                typedef const T* const_iterator;
                typedef T value_type;
                typedef std::size_t size_type;
                typedef std::ptrdiff_t difference_type;

                // size of the array ( static );
                BOOST_STATIC_CONSTANT( size_type, array_size = sz );
            };

#else // BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION

            // array traits ( no partial specialization )
            /*
                without parial specialization we are able to
                provide support only for a limited number of
                types. Currently the primitive numeric types 
                are supported
            */
            template< typename T, typename BaseT >
            struct array_traits_impl
            {
                typedef BaseT value_type;
                typedef BaseT* iterator;
                typedef const BaseT* const_iterator;
                typedef std::size_t size_type;
                typedef std::ptrdiff_t difference_type;

                // size of the array
                BOOST_STATIC_CONSTANT( size_type, array_size = sizeof(T)/sizeof(BaseT) );
            };
            
            template< typename T, typename BaseT >
            struct array_traits_impl_selector
            {
                typedef array_traits_impl<T,BaseT> type;
            };

            struct array_traits_void
            {
                typedef void type;
            };

            template< typename T, typename BaseT >
            struct array_traits_cv_selector
            {
                typedef BOOST_STRING_TYPENAME 
                    ::boost::mpl::eval_if< 
                        ::boost::is_convertible<T,BaseT*>,
                        array_traits_impl_selector<T,BaseT>,
                        ::boost::mpl::eval_if< 
                            ::boost::is_convertible<T,const BaseT*>,
                                array_traits_impl_selector<T, const BaseT>,
                                ::boost::mpl::eval_if< 
                                    ::boost::is_convertible<T, volatile BaseT*>,
                                    array_traits_impl_selector<T, volatile BaseT>,
                                    array_traits_impl_selector<T, const volatile BaseT>
                                >
                            >
                    >::type type;
            };

            template< typename T >
            struct array_traits_select
            {
                template< typename T1, typename T2 >
                struct apply
                {
                    typedef BOOST_STRING_TYPENAME
                        ::boost::mpl::eval_if< 
                            ::boost::is_convertible<T,const volatile T2*>,
                            array_traits_cv_selector<T,T2>,
                            ::boost::mpl::identity<T1> >::type type;
                };
            };

            template< typename T >
            struct array_traits_selector 
            {
            private:
                // supported array base types
#ifndef BOOST_NO_INTRINSIC_WCHAR_T
                typedef BOOST_STRING_TYPENAME
                    ::boost::mpl::vector10<
                        wchar_t,
#else // BOOST_NO_INTRINSIC_WCHAR_T
                typedef BOOST_STRING_TYPENAME
                    ::boost::mpl::vector9<
#endif // BOOST_NO_INTRINSIC_WCHAR_T
                        char,
                        signed char,
                        unsigned char,
                        signed short,
                        unsigned short,
                        signed int,
                        unsigned int,
                        signed long,
                        unsigned long
                >::type array_base_types;

            public:
                typedef BOOST_STRING_TYPENAME
                    ::boost::mpl::fold<
                        array_base_types,
                        ::boost::algorithm::detail::array_traits_void,
                        ::boost::algorithm::detail::array_traits_select<T> >::type type;
            };

            template< typename T >
            struct array_traits
            {
                typedef BOOST_STRING_TYPENAME
                    array_traits_selector<T>::type traits_type;

                typedef BOOST_STRING_TYPENAME
                    traits_type::value_type value_type;
                typedef BOOST_STRING_TYPENAME
                    traits_type::iterator iterator;
                typedef BOOST_STRING_TYPENAME
                    traits_type::const_iterator const_iterator;
                typedef BOOST_STRING_TYPENAME
                    traits_type::size_type size_type;
                typedef BOOST_STRING_TYPENAME
                    traits_type::difference_type difference_type;

                BOOST_STATIC_CONSTANT( size_type, array_size = traits_type::array_size );
            };

#endif // BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
            
            // array lenght resolving
            /*
                Lenght of string contained in a static array could
                be different from the size of the array.
                For string processing we need the lenght without
                terminating 0.

                Therefore, the lenght is calulated for char and wchar_t
                using char_traits, rather then simply returning
                the array size.
            */
            template< typename T >
            struct array_length_selector
            {
                template< typename TraitsT >
                struct array_length
                {
                    typedef BOOST_STRING_TYPENAME 
                        TraitsT::size_type size_type;

                    BOOST_STATIC_CONSTANT(
                        size_type,
                        array_size=TraitsT::array_size );

                    template< typename A >
                    static size_type length( const A& )
                    {
                        return array_size;
                    }

                    template< typename A >
                    static bool empty( const A& )
                    {
                        return array_size==0;
                    }
                };
            };

            // specialization for char
            template<>
            struct array_length_selector<char>
            {
                template< typename TraitsT >
                struct array_length
                {
                    typedef BOOST_STRING_TYPENAME 
                        TraitsT::size_type size_type;

                    template< typename A >
                    static size_type length( const A& a )
                    {
                        if ( a==0 ) 
                            return 0;
                        else
                            return std::char_traits<char>::length(a);
                    }
                    
                    template< typename A >
                    static bool empty( const A& a )
                    {
                        return a==0 || a[0]==0;
                    }
                };
            };

            // specialization for wchar_t
            template<>
            struct array_length_selector<wchar_t>
            {
                template< typename TraitsT >
                struct array_length
                {
                    typedef BOOST_STRING_TYPENAME 
                        TraitsT::size_type size_type;

                    template< typename A >
                    static size_type length( const A& a )
                    {
                        if ( a==0 ) 
                            return 0;
                        else
                            return std::char_traits<wchar_t>::length(a);
                    }

                    template< typename A >
                    static bool empty( const A& a )
                    {
                        return a==0 || a[0]==0;
                    }
                };
            };

            template< typename T >
            struct array_container_traits
            {
            private:
                // resolve array traits
                typedef array_traits<T> traits_type;

            public:
                typedef BOOST_STRING_TYPENAME
                    traits_type::value_type value_type;
                typedef BOOST_STRING_TYPENAME
                    traits_type::iterator iterator;
                typedef BOOST_STRING_TYPENAME
                    traits_type::const_iterator const_iterator;
                typedef BOOST_STRING_TYPENAME
                    traits_type::size_type size_type;
                typedef BOOST_STRING_TYPENAME
                    traits_type::difference_type difference_type;

                typedef BOOST_STRING_TYPENAME
                    ::boost::mpl::if_< ::boost::is_const<T>,
                        const_iterator,
                        iterator 
                    >::type result_iterator;
                
            private:
                // resolve array size
                typedef BOOST_STRING_TYPENAME
                    ::boost::remove_cv<value_type>::type char_type;
                typedef BOOST_STRING_TYPENAME
                    array_length_selector<char_type>::
                        BOOST_NESTED_TEMPLATE array_length<traits_type> array_length_type;

            public:
                BOOST_STATIC_CONSTANT( size_type, array_size = traits_type::array_size );

                // static operations
                template< typename A >
                static size_type size( const A& a )
                {
                    return array_length_type::length(a);
                }

                template< typename A >
                static bool empty( const A& a )
                {
                    return array_length_type::empty(a);
                }
                

#ifndef BOOST_NO_FUNCTION_TEMPLATE_ORDERING

                template< typename A >
                static iterator begin( A& a )
                {
                    return a;
                }

                template< typename A >
                static const_iterator begin( const A& a )
                {
                    return a;
                }

                template< typename A >
                static iterator end( A& a )
                {
                    return a+array_length_type::length(a);
                }

                template< typename A >
                static const_iterator end( const A& a )
                {
                    return a+array_length_type::length(a);
                }

#else // BOOST_NO_FUNCTION_TEMPLATE_ORDERING

                template< typename A >
                static result_iterator begin( A& a )
                {
                    return a;
                }

                template< typename A >
                static result_iterator end( A& a )
                {
                    return a+array_length_type::length(a);
                }

#endif // BOOST_NO_FUNCTION_TEMPLATE_ORDERING    

            }; 

            template<typename T>
            struct array_container_traits_selector
            {
                typedef array_container_traits<T> type;
            };

// Pointer container traits ---------------------------------------------------------------

            template<typename T>
            struct pointer_container_traits
            {
                typedef BOOST_STRING_TYPENAME
                    ::boost::remove_pointer<T>::type value_type;

                typedef BOOST_STRING_TYPENAME
                    ::boost::remove_cv<value_type>::type char_type;
                typedef ::std::char_traits<char_type> char_traits;

                typedef value_type* iterator;
                typedef const value_type* const_iterator;
                typedef std::ptrdiff_t difference_type;
                typedef std::size_t size_type;

                typedef BOOST_STRING_TYPENAME
                    ::boost::mpl::if_< ::boost::is_const<T>,
                        const_iterator,
                        iterator 
                    >::type result_iterator;

                // static operations
                template< typename P >
                static size_type size( const P& p )
                {
                    if ( p==0 ) 
                        return 0;
                    else
                        return char_traits::length(p);
                }

                template< typename P >
                static bool empty( const P& p )
                {
                    return p==0 || p[0]==0;
                }

#ifndef BOOST_NO_FUNCTION_TEMPLATE_ORDERING

                template< typename P >
                static iterator begin( P& p )
                {
                    return p;
                }

                template< typename P >
                static const_iterator begin( const P& p )
                {
                    return p;
                }

                template< typename P >
                static iterator end( P& p )
                {
                    if ( p==0 )
                        return p;
                    else
                        return p+char_traits::length(p);
                }

                template< typename P >
                static const_iterator end( const P& p )
                {
                    if ( p==0 )
                        return p;
                    else
                        return p+char_traits::length(p);
                }

#else // BOOST_NO_FUNCTION_TEMPLATE_ORDERING

                template< typename P >
                static result_iterator begin( P& p )
                {
                    return p;
                }

                template< typename P >
                static result_iterator end( P& p )
                {
                    if ( p==0 )
                        return p;
                    else
                        return p+char_traits::length(p);
                }

#endif // BOOST_NO_FUNCTION_TEMPLATE_ORDERING    
            }; 

            template<typename T>
            struct pointer_container_traits_selector
            {
                typedef pointer_container_traits<T> type;
            };

        } // namespace detail
    } // namespace algorithm
} // namespace boost


#endif  // BOOST_STRING_DETAIL_COLLECTION_HPP