File: concept_check.hpp

package info (click to toggle)
boost1.62 1.62.0+dfsg-10
  • links: PTS, VCS
  • area: main
  • in suites: sid
  • size: 687,152 kB
  • sloc: cpp: 2,613,639; xml: 972,558; ansic: 53,674; python: 32,448; sh: 9,305; asm: 3,071; cs: 2,121; makefile: 967; perl: 859; yacc: 472; php: 132; ruby: 94; f90: 55; sql: 13; csh: 6
file content (1082 lines) | stat: -rw-r--r-- 31,927 bytes parent folder | download | duplicates (17)
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
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
//
// (C) Copyright Jeremy Siek 2000.
// Copyright 2002 The Trustees of Indiana University.
//
// Distributed under 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)
//
// Revision History:
//   05 May   2001: Workarounds for HP aCC from Thomas Matelich. (Jeremy Siek)
//   02 April 2001: Removed limits header altogether. (Jeremy Siek)
//   01 April 2001: Modified to use new <boost/limits.hpp> header. (JMaddock)
//

// See http://www.boost.org/libs/concept_check for documentation.

#ifndef BOOST_CONCEPT_CHECKS_HPP
# define BOOST_CONCEPT_CHECKS_HPP

# include <boost/concept/assert.hpp>

# include <iterator>
# include <boost/type_traits/conversion_traits.hpp>
# include <utility>
# include <boost/type_traits/is_same.hpp>
# include <boost/type_traits/is_void.hpp>
# include <boost/mpl/assert.hpp>
# include <boost/mpl/bool.hpp>
# include <boost/detail/workaround.hpp>

# include <boost/concept/usage.hpp>
# include <boost/concept/detail/concept_def.hpp>

#if (defined _MSC_VER)
# pragma warning( push )
# pragma warning( disable : 4510 ) // default constructor could not be generated
# pragma warning( disable : 4610 ) // object 'class' can never be instantiated - user-defined constructor required
#endif

namespace boost
{

  //
  // Backward compatibility
  //

  template <class Model>
  inline void function_requires(Model* = 0)
  {
      BOOST_CONCEPT_ASSERT((Model));
  }
  template <class T> inline void ignore_unused_variable_warning(T const&) {}

#  define BOOST_CLASS_REQUIRE(type_var, ns, concept)    \
    BOOST_CONCEPT_ASSERT((ns::concept<type_var>))

#  define BOOST_CLASS_REQUIRE2(type_var1, type_var2, ns, concept)   \
    BOOST_CONCEPT_ASSERT((ns::concept<type_var1,type_var2>))

#  define BOOST_CLASS_REQUIRE3(tv1, tv2, tv3, ns, concept)  \
    BOOST_CONCEPT_ASSERT((ns::concept<tv1,tv2,tv3>))

#  define BOOST_CLASS_REQUIRE4(tv1, tv2, tv3, tv4, ns, concept) \
    BOOST_CONCEPT_ASSERT((ns::concept<tv1,tv2,tv3,tv4>))


  //
  // Begin concept definitions
  //
  BOOST_concept(Integer, (T))
  {
      BOOST_CONCEPT_USAGE(Integer)
        {
            x.error_type_must_be_an_integer_type();
        }
   private:
      T x;
  };

  template <> struct Integer<char> {};
  template <> struct Integer<signed char> {};
  template <> struct Integer<unsigned char> {};
  template <> struct Integer<short> {};
  template <> struct Integer<unsigned short> {};
  template <> struct Integer<int> {};
  template <> struct Integer<unsigned int> {};
  template <> struct Integer<long> {};
  template <> struct Integer<unsigned long> {};
# if defined(BOOST_HAS_LONG_LONG)
  template <> struct Integer< ::boost::long_long_type> {};
  template <> struct Integer< ::boost::ulong_long_type> {};
# elif defined(BOOST_HAS_MS_INT64)
  template <> struct Integer<__int64> {};
  template <> struct Integer<unsigned __int64> {};
# endif

  BOOST_concept(SignedInteger,(T)) {
    BOOST_CONCEPT_USAGE(SignedInteger) {
      x.error_type_must_be_a_signed_integer_type();
    }
   private:
    T x;
  };
  template <> struct SignedInteger<signed char> { };
  template <> struct SignedInteger<short> {};
  template <> struct SignedInteger<int> {};
  template <> struct SignedInteger<long> {};
# if defined(BOOST_HAS_LONG_LONG)
  template <> struct SignedInteger< ::boost::long_long_type> {};
# elif defined(BOOST_HAS_MS_INT64)
  template <> struct SignedInteger<__int64> {};
# endif

  BOOST_concept(UnsignedInteger,(T)) {
    BOOST_CONCEPT_USAGE(UnsignedInteger) {
      x.error_type_must_be_an_unsigned_integer_type();
    }
   private:
    T x;
  };

  template <> struct UnsignedInteger<unsigned char> {};
  template <> struct UnsignedInteger<unsigned short> {};
  template <> struct UnsignedInteger<unsigned int> {};
  template <> struct UnsignedInteger<unsigned long> {};
# if defined(BOOST_HAS_LONG_LONG)
  template <> struct UnsignedInteger< ::boost::ulong_long_type> {};
# elif defined(BOOST_HAS_MS_INT64)
  template <> struct UnsignedInteger<unsigned __int64> {};
# endif

  //===========================================================================
  // Basic Concepts

  BOOST_concept(DefaultConstructible,(TT))
  {
    BOOST_CONCEPT_USAGE(DefaultConstructible) {
      TT a;               // require default constructor
      ignore_unused_variable_warning(a);
    }
  };

  BOOST_concept(Assignable,(TT))
  {
    BOOST_CONCEPT_USAGE(Assignable) {
#if !defined(_ITERATOR_) // back_insert_iterator broken for VC++ STL
      a = b;             // require assignment operator
#endif
      const_constraints(b);
    }
   private:
    void const_constraints(const TT& x) {
#if !defined(_ITERATOR_) // back_insert_iterator broken for VC++ STL
      a = x;              // const required for argument to assignment
#else
      ignore_unused_variable_warning(x);
#endif
    }
   private:
    TT a;
    TT b;
  };


  BOOST_concept(CopyConstructible,(TT))
  {
    BOOST_CONCEPT_USAGE(CopyConstructible) {
      TT a(b);            // require copy constructor
      TT* ptr = &a;       // require address of operator
      const_constraints(a);
      ignore_unused_variable_warning(ptr);
    }
   private:
    void const_constraints(const TT& a) {
      TT c(a);            // require const copy constructor
      const TT* ptr = &a; // require const address of operator
      ignore_unused_variable_warning(c);
      ignore_unused_variable_warning(ptr);
    }
    TT b;
  };

  // The SGI STL version of Assignable requires copy constructor and operator=
  BOOST_concept(SGIAssignable,(TT))
  {
    BOOST_CONCEPT_USAGE(SGIAssignable) {
      TT c(a);
#if !defined(_ITERATOR_) // back_insert_iterator broken for VC++ STL
      a = b;              // require assignment operator
#endif
      const_constraints(b);
      ignore_unused_variable_warning(c);
    }
   private:
    void const_constraints(const TT& x) {
      TT c(x);
#if !defined(_ITERATOR_) // back_insert_iterator broken for VC++ STL
      a = x;              // const required for argument to assignment
#endif
      ignore_unused_variable_warning(c);
    }
    TT a;
    TT b;
  };

  BOOST_concept(Convertible,(X)(Y))
  {
    BOOST_CONCEPT_USAGE(Convertible) {
      Y y = x;
      ignore_unused_variable_warning(y);
    }
   private:
    X x;
  };

  // The C++ standard requirements for many concepts talk about return
  // types that must be "convertible to bool".  The problem with this
  // requirement is that it leaves the door open for evil proxies that
  // define things like operator|| with strange return types.  Two
  // possible solutions are:
  // 1) require the return type to be exactly bool
  // 2) stay with convertible to bool, and also
  //    specify stuff about all the logical operators.
  // For now we just test for convertible to bool.
  template <class TT>
  void require_boolean_expr(const TT& t) {
    bool x = t;
    ignore_unused_variable_warning(x);
  }

  BOOST_concept(EqualityComparable,(TT))
  {
    BOOST_CONCEPT_USAGE(EqualityComparable) {
      require_boolean_expr(a == b);
      require_boolean_expr(a != b);
    }
   private:
    TT a, b;
  };

  BOOST_concept(LessThanComparable,(TT))
  {
    BOOST_CONCEPT_USAGE(LessThanComparable) {
      require_boolean_expr(a < b);
    }
   private:
    TT a, b;
  };

  // This is equivalent to SGI STL's LessThanComparable.
  BOOST_concept(Comparable,(TT))
  {
    BOOST_CONCEPT_USAGE(Comparable) {
      require_boolean_expr(a < b);
      require_boolean_expr(a > b);
      require_boolean_expr(a <= b);
      require_boolean_expr(a >= b);
    }
   private:
    TT a, b;
  };

#define BOOST_DEFINE_BINARY_PREDICATE_OP_CONSTRAINT(OP,NAME)    \
  BOOST_concept(NAME, (First)(Second))                          \
  {                                                             \
      BOOST_CONCEPT_USAGE(NAME) { (void)constraints_(); }                         \
     private:                                                   \
        bool constraints_() { return a OP b; }                  \
        First a;                                                \
        Second b;                                               \
  }

#define BOOST_DEFINE_BINARY_OPERATOR_CONSTRAINT(OP,NAME)    \
  BOOST_concept(NAME, (Ret)(First)(Second))                 \
  {                                                         \
      BOOST_CONCEPT_USAGE(NAME) { (void)constraints_(); }                     \
  private:                                                  \
      Ret constraints_() { return a OP b; }                 \
      First a;                                              \
      Second b;                                             \
  }

  BOOST_DEFINE_BINARY_PREDICATE_OP_CONSTRAINT(==, EqualOp);
  BOOST_DEFINE_BINARY_PREDICATE_OP_CONSTRAINT(!=, NotEqualOp);
  BOOST_DEFINE_BINARY_PREDICATE_OP_CONSTRAINT(<, LessThanOp);
  BOOST_DEFINE_BINARY_PREDICATE_OP_CONSTRAINT(<=, LessEqualOp);
  BOOST_DEFINE_BINARY_PREDICATE_OP_CONSTRAINT(>, GreaterThanOp);
  BOOST_DEFINE_BINARY_PREDICATE_OP_CONSTRAINT(>=, GreaterEqualOp);

  BOOST_DEFINE_BINARY_OPERATOR_CONSTRAINT(+, PlusOp);
  BOOST_DEFINE_BINARY_OPERATOR_CONSTRAINT(*, TimesOp);
  BOOST_DEFINE_BINARY_OPERATOR_CONSTRAINT(/, DivideOp);
  BOOST_DEFINE_BINARY_OPERATOR_CONSTRAINT(-, SubtractOp);
  BOOST_DEFINE_BINARY_OPERATOR_CONSTRAINT(%, ModOp);

  //===========================================================================
  // Function Object Concepts

  BOOST_concept(Generator,(Func)(Return))
  {
      BOOST_CONCEPT_USAGE(Generator) { test(is_void<Return>()); }

   private:
      void test(boost::mpl::false_)
      {
          // Do we really want a reference here?
          const Return& r = f();
          ignore_unused_variable_warning(r);
      }

      void test(boost::mpl::true_)
      {
          f();
      }

      Func f;
  };

  BOOST_concept(UnaryFunction,(Func)(Return)(Arg))
  {
      BOOST_CONCEPT_USAGE(UnaryFunction) { test(is_void<Return>()); }

   private:
      void test(boost::mpl::false_)
      {
          f(arg);               // "priming the pump" this way keeps msvc6 happy (ICE)
          Return r = f(arg);
          ignore_unused_variable_warning(r);
      }

      void test(boost::mpl::true_)
      {
          f(arg);
      }

#if (BOOST_WORKAROUND(__GNUC__, BOOST_TESTED_AT(4) \
                      && BOOST_WORKAROUND(__GNUC__, > 3)))
      // Declare a dummy construktor to make gcc happy.
      // It seems the compiler can not generate a sensible constructor when this is instantiated with a refence type.
      // (warning: non-static reference "const double& boost::UnaryFunction<YourClassHere>::arg"
      // in class without a constructor [-Wuninitialized])
      UnaryFunction();
#endif

      Func f;
      Arg arg;
  };

  BOOST_concept(BinaryFunction,(Func)(Return)(First)(Second))
  {
      BOOST_CONCEPT_USAGE(BinaryFunction) { test(is_void<Return>()); }
   private:
      void test(boost::mpl::false_)
      {
          f(first,second);
          Return r = f(first, second); // require operator()
          (void)r;
      }

      void test(boost::mpl::true_)
      {
          f(first,second);
      }

#if (BOOST_WORKAROUND(__GNUC__, BOOST_TESTED_AT(4) \
                      && BOOST_WORKAROUND(__GNUC__, > 3)))
      // Declare a dummy constructor to make gcc happy.
      // It seems the compiler can not generate a sensible constructor when this is instantiated with a refence type.
      // (warning: non-static reference "const double& boost::BinaryFunction<YourClassHere>::arg"
      // in class without a constructor [-Wuninitialized])
      BinaryFunction();
#endif

      Func f;
      First first;
      Second second;
  };

  BOOST_concept(UnaryPredicate,(Func)(Arg))
  {
    BOOST_CONCEPT_USAGE(UnaryPredicate) {
      require_boolean_expr(f(arg)); // require operator() returning bool
    }
   private:
#if (BOOST_WORKAROUND(__GNUC__, BOOST_TESTED_AT(4) \
                      && BOOST_WORKAROUND(__GNUC__, > 3)))
      // Declare a dummy constructor to make gcc happy.
      // It seems the compiler can not generate a sensible constructor when this is instantiated with a refence type.
      // (warning: non-static reference "const double& boost::UnaryPredicate<YourClassHere>::arg"
      // in class without a constructor [-Wuninitialized])
      UnaryPredicate();
#endif

    Func f;
    Arg arg;
  };

  BOOST_concept(BinaryPredicate,(Func)(First)(Second))
  {
    BOOST_CONCEPT_USAGE(BinaryPredicate) {
      require_boolean_expr(f(a, b)); // require operator() returning bool
    }
   private:
#if (BOOST_WORKAROUND(__GNUC__, BOOST_TESTED_AT(4) \
                      && BOOST_WORKAROUND(__GNUC__, > 3)))
      // Declare a dummy constructor to make gcc happy.
      // It seems the compiler can not generate a sensible constructor when this is instantiated with a refence type.
      // (warning: non-static reference "const double& boost::BinaryPredicate<YourClassHere>::arg"
      // in class without a constructor [-Wuninitialized])
      BinaryPredicate();
#endif
    Func f;
    First a;
    Second b;
  };

  // use this when functor is used inside a container class like std::set
  BOOST_concept(Const_BinaryPredicate,(Func)(First)(Second))
    : BinaryPredicate<Func, First, Second>
  {
    BOOST_CONCEPT_USAGE(Const_BinaryPredicate) {
      const_constraints(f);
    }
   private:
    void const_constraints(const Func& fun) {
      // operator() must be a const member function
      require_boolean_expr(fun(a, b));
    }
#if (BOOST_WORKAROUND(__GNUC__, BOOST_TESTED_AT(4) \
                      && BOOST_WORKAROUND(__GNUC__, > 3)))
      // Declare a dummy constructor to make gcc happy.
      // It seems the compiler can not generate a sensible constructor when this is instantiated with a refence type.
      // (warning: non-static reference "const double& boost::Const_BinaryPredicate<YourClassHere>::arg"
      // in class without a constructor [-Wuninitialized])
      Const_BinaryPredicate();
#endif

    Func f;
    First a;
    Second b;
  };

  BOOST_concept(AdaptableGenerator,(Func)(Return))
    : Generator<Func, typename Func::result_type>
  {
      typedef typename Func::result_type result_type;

      BOOST_CONCEPT_USAGE(AdaptableGenerator)
      {
          BOOST_CONCEPT_ASSERT((Convertible<result_type, Return>));
      }
  };

  BOOST_concept(AdaptableUnaryFunction,(Func)(Return)(Arg))
    : UnaryFunction<Func, typename Func::result_type, typename Func::argument_type>
  {
      typedef typename Func::argument_type argument_type;
      typedef typename Func::result_type result_type;

      ~AdaptableUnaryFunction()
      {
          BOOST_CONCEPT_ASSERT((Convertible<result_type, Return>));
          BOOST_CONCEPT_ASSERT((Convertible<Arg, argument_type>));
      }
  };

  BOOST_concept(AdaptableBinaryFunction,(Func)(Return)(First)(Second))
    : BinaryFunction<
          Func
        , typename Func::result_type
        , typename Func::first_argument_type
        , typename Func::second_argument_type
      >
  {
      typedef typename Func::first_argument_type first_argument_type;
      typedef typename Func::second_argument_type second_argument_type;
      typedef typename Func::result_type result_type;

      ~AdaptableBinaryFunction()
      {
          BOOST_CONCEPT_ASSERT((Convertible<result_type, Return>));
          BOOST_CONCEPT_ASSERT((Convertible<First, first_argument_type>));
          BOOST_CONCEPT_ASSERT((Convertible<Second, second_argument_type>));
      }
  };

  BOOST_concept(AdaptablePredicate,(Func)(Arg))
    : UnaryPredicate<Func, Arg>
    , AdaptableUnaryFunction<Func, bool, Arg>
  {
  };

  BOOST_concept(AdaptableBinaryPredicate,(Func)(First)(Second))
    : BinaryPredicate<Func, First, Second>
    , AdaptableBinaryFunction<Func, bool, First, Second>
  {
  };

  //===========================================================================
  // Iterator Concepts

  BOOST_concept(InputIterator,(TT))
    : Assignable<TT>
    , EqualityComparable<TT>
  {
      typedef typename std::iterator_traits<TT>::value_type value_type;
      typedef typename std::iterator_traits<TT>::difference_type difference_type;
      typedef typename std::iterator_traits<TT>::reference reference;
      typedef typename std::iterator_traits<TT>::pointer pointer;
      typedef typename std::iterator_traits<TT>::iterator_category iterator_category;

      BOOST_CONCEPT_USAGE(InputIterator)
      {
        BOOST_CONCEPT_ASSERT((SignedInteger<difference_type>));
        BOOST_CONCEPT_ASSERT((Convertible<iterator_category, std::input_iterator_tag>));

        TT j(i);
        (void)*i;           // require dereference operator
        ++j;                // require preincrement operator
        i++;                // require postincrement operator
      }
   private:
    TT i;
  };

  BOOST_concept(OutputIterator,(TT)(ValueT))
    : Assignable<TT>
  {
    BOOST_CONCEPT_USAGE(OutputIterator) {

      ++i;                // require preincrement operator
      i++;                // require postincrement operator
      *i++ = t;           // require postincrement and assignment
    }
   private:
    TT i, j;
    ValueT t;
  };

  BOOST_concept(ForwardIterator,(TT))
    : InputIterator<TT>
  {
      BOOST_CONCEPT_USAGE(ForwardIterator)
      {
          BOOST_CONCEPT_ASSERT((Convertible<
              BOOST_DEDUCED_TYPENAME ForwardIterator::iterator_category
            , std::forward_iterator_tag
          >));

          typename InputIterator<TT>::reference r = *i;
          ignore_unused_variable_warning(r);
      }

   private:
      TT i;
  };

  BOOST_concept(Mutable_ForwardIterator,(TT))
    : ForwardIterator<TT>
  {
      BOOST_CONCEPT_USAGE(Mutable_ForwardIterator) {
        *i++ = *j;         // require postincrement and assignment
      }
   private:
      TT i, j;
  };

  BOOST_concept(BidirectionalIterator,(TT))
    : ForwardIterator<TT>
  {
      BOOST_CONCEPT_USAGE(BidirectionalIterator)
      {
          BOOST_CONCEPT_ASSERT((Convertible<
              BOOST_DEDUCED_TYPENAME BidirectionalIterator::iterator_category
            , std::bidirectional_iterator_tag
          >));

          --i;                // require predecrement operator
          i--;                // require postdecrement operator
      }
   private:
      TT i;
  };

  BOOST_concept(Mutable_BidirectionalIterator,(TT))
    : BidirectionalIterator<TT>
    , Mutable_ForwardIterator<TT>
  {
      BOOST_CONCEPT_USAGE(Mutable_BidirectionalIterator)
      {
          *i-- = *j;                  // require postdecrement and assignment
      }
   private:
      TT i, j;
  };

  BOOST_concept(RandomAccessIterator,(TT))
    : BidirectionalIterator<TT>
    , Comparable<TT>
  {
      BOOST_CONCEPT_USAGE(RandomAccessIterator)
      {
          BOOST_CONCEPT_ASSERT((Convertible<
              BOOST_DEDUCED_TYPENAME BidirectionalIterator<TT>::iterator_category
            , std::random_access_iterator_tag
          >));

          i += n;             // require assignment addition operator
          i = i + n; i = n + i; // require addition with difference type
          i -= n;             // require assignment subtraction operator
          i = i - n;                  // require subtraction with difference type
          n = i - j;                  // require difference operator
          (void)i[n];                 // require element access operator
      }

   private:
    TT a, b;
    TT i, j;
      typename std::iterator_traits<TT>::difference_type n;
  };

  BOOST_concept(Mutable_RandomAccessIterator,(TT))
    : RandomAccessIterator<TT>
    , Mutable_BidirectionalIterator<TT>
  {
      BOOST_CONCEPT_USAGE(Mutable_RandomAccessIterator)
      {
          i[n] = *i;                  // require element access and assignment
      }
   private:
    TT i;
    typename std::iterator_traits<TT>::difference_type n;
  };

  //===========================================================================
  // Container s

  BOOST_concept(Container,(C))
    : Assignable<C>
  {
    typedef typename C::value_type value_type;
    typedef typename C::difference_type difference_type;
    typedef typename C::size_type size_type;
    typedef typename C::const_reference const_reference;
    typedef typename C::const_pointer const_pointer;
    typedef typename C::const_iterator const_iterator;

      BOOST_CONCEPT_USAGE(Container)
      {
          BOOST_CONCEPT_ASSERT((InputIterator<const_iterator>));
          const_constraints(c);
      }

   private:
      void const_constraints(const C& cc) {
          i = cc.begin();
          i = cc.end();
          n = cc.size();
          n = cc.max_size();
          b = cc.empty();
      }
      C c;
      bool b;
      const_iterator i;
      size_type n;
  };

  BOOST_concept(Mutable_Container,(C))
    : Container<C>
  {
      typedef typename C::reference reference;
      typedef typename C::iterator iterator;
      typedef typename C::pointer pointer;

      BOOST_CONCEPT_USAGE(Mutable_Container)
      {
          BOOST_CONCEPT_ASSERT((
               Assignable<typename Mutable_Container::value_type>));

          BOOST_CONCEPT_ASSERT((InputIterator<iterator>));

          i = c.begin();
          i = c.end();
          c.swap(c2);
      }

   private:
      iterator i;
      C c, c2;
  };

  BOOST_concept(ForwardContainer,(C))
    : Container<C>
  {
      BOOST_CONCEPT_USAGE(ForwardContainer)
      {
          BOOST_CONCEPT_ASSERT((
               ForwardIterator<
                    typename ForwardContainer::const_iterator
               >));
      }
  };

  BOOST_concept(Mutable_ForwardContainer,(C))
    : ForwardContainer<C>
    , Mutable_Container<C>
  {
      BOOST_CONCEPT_USAGE(Mutable_ForwardContainer)
      {
          BOOST_CONCEPT_ASSERT((
               Mutable_ForwardIterator<
                   typename Mutable_ForwardContainer::iterator
               >));
      }
  };

  BOOST_concept(ReversibleContainer,(C))
    : ForwardContainer<C>
  {
      typedef typename
        C::const_reverse_iterator
      const_reverse_iterator;

      BOOST_CONCEPT_USAGE(ReversibleContainer)
      {
          BOOST_CONCEPT_ASSERT((
              BidirectionalIterator<
                  typename ReversibleContainer::const_iterator>));

          BOOST_CONCEPT_ASSERT((BidirectionalIterator<const_reverse_iterator>));

          const_constraints(c);
      }
   private:
      void const_constraints(const C& cc)
      {
          const_reverse_iterator i = cc.rbegin();
          i = cc.rend();
      }
      C c;
  };

  BOOST_concept(Mutable_ReversibleContainer,(C))
    : Mutable_ForwardContainer<C>
    , ReversibleContainer<C>
  {
      typedef typename C::reverse_iterator reverse_iterator;

      BOOST_CONCEPT_USAGE(Mutable_ReversibleContainer)
      {
          typedef typename Mutable_ForwardContainer<C>::iterator iterator;
          BOOST_CONCEPT_ASSERT((Mutable_BidirectionalIterator<iterator>));
          BOOST_CONCEPT_ASSERT((Mutable_BidirectionalIterator<reverse_iterator>));

          reverse_iterator i = c.rbegin();
          i = c.rend();
      }
   private:
      C c;
  };

  BOOST_concept(RandomAccessContainer,(C))
    : ReversibleContainer<C>
  {
      typedef typename C::size_type size_type;
      typedef typename C::const_reference const_reference;

      BOOST_CONCEPT_USAGE(RandomAccessContainer)
      {
          BOOST_CONCEPT_ASSERT((
              RandomAccessIterator<
                  typename RandomAccessContainer::const_iterator
              >));

          const_constraints(c);
      }
   private:
      void const_constraints(const C& cc)
      {
          const_reference r = cc[n];
          ignore_unused_variable_warning(r);
      }

      C c;
      size_type n;
  };

  BOOST_concept(Mutable_RandomAccessContainer,(C))
    : Mutable_ReversibleContainer<C>
    , RandomAccessContainer<C>
  {
   private:
      typedef Mutable_RandomAccessContainer self;
   public:
      BOOST_CONCEPT_USAGE(Mutable_RandomAccessContainer)
      {
          BOOST_CONCEPT_ASSERT((Mutable_RandomAccessIterator<typename self::iterator>));
          BOOST_CONCEPT_ASSERT((Mutable_RandomAccessIterator<typename self::reverse_iterator>));

          typename self::reference r = c[i];
          ignore_unused_variable_warning(r);
      }

   private:
      typename Mutable_ReversibleContainer<C>::size_type i;
      C c;
  };

  // A Sequence is inherently mutable
  BOOST_concept(Sequence,(S))
    : Mutable_ForwardContainer<S>
      // Matt Austern's book puts DefaultConstructible here, the C++
      // standard places it in Container --JGS
      // ... so why aren't we following the standard?  --DWA
    , DefaultConstructible<S>
  {
      BOOST_CONCEPT_USAGE(Sequence)
      {
          S
              c(n, t),
              c2(first, last);

          c.insert(p, t);
          c.insert(p, n, t);
          c.insert(p, first, last);

          c.erase(p);
          c.erase(p, q);

          typename Sequence::reference r = c.front();

          ignore_unused_variable_warning(c);
          ignore_unused_variable_warning(c2);
          ignore_unused_variable_warning(r);
          const_constraints(c);
      }
   private:
      void const_constraints(const S& c) {
          typename Sequence::const_reference r = c.front();
          ignore_unused_variable_warning(r);
      }

      typename S::value_type t;
      typename S::size_type n;
      typename S::value_type* first, *last;
      typename S::iterator p, q;
  };

  BOOST_concept(FrontInsertionSequence,(S))
    : Sequence<S>
  {
      BOOST_CONCEPT_USAGE(FrontInsertionSequence)
      {
          c.push_front(t);
          c.pop_front();
      }
   private:
      S c;
      typename S::value_type t;
  };

  BOOST_concept(BackInsertionSequence,(S))
    : Sequence<S>
  {
      BOOST_CONCEPT_USAGE(BackInsertionSequence)
      {
          c.push_back(t);
          c.pop_back();
          typename BackInsertionSequence::reference r = c.back();
          ignore_unused_variable_warning(r);
          const_constraints(c);
      }
   private:
      void const_constraints(const S& cc) {
          typename BackInsertionSequence::const_reference
              r = cc.back();
          ignore_unused_variable_warning(r);
      }
      S c;
      typename S::value_type t;
  };

  BOOST_concept(AssociativeContainer,(C))
    : ForwardContainer<C>
    , DefaultConstructible<C>
  {
      typedef typename C::key_type key_type;
      typedef typename C::key_compare key_compare;
      typedef typename C::value_compare value_compare;
      typedef typename C::iterator iterator;

      BOOST_CONCEPT_USAGE(AssociativeContainer)
      {
          i = c.find(k);
          r = c.equal_range(k);
          c.erase(k);
          c.erase(i);
          c.erase(r.first, r.second);
          const_constraints(c);
          BOOST_CONCEPT_ASSERT((BinaryPredicate<key_compare,key_type,key_type>));

          typedef typename AssociativeContainer::value_type value_type_;
          BOOST_CONCEPT_ASSERT((BinaryPredicate<value_compare,value_type_,value_type_>));
      }

      // Redundant with the base concept, but it helps below.
      typedef typename C::const_iterator const_iterator;
   private:
      void const_constraints(const C& cc)
      {
          ci = cc.find(k);
          n = cc.count(k);
          cr = cc.equal_range(k);
      }

      C c;
      iterator i;
      std::pair<iterator,iterator> r;
      const_iterator ci;
      std::pair<const_iterator,const_iterator> cr;
      typename C::key_type k;
      typename C::size_type n;
  };

  BOOST_concept(UniqueAssociativeContainer,(C))
    : AssociativeContainer<C>
  {
      BOOST_CONCEPT_USAGE(UniqueAssociativeContainer)
      {
          C c(first, last);

          pos_flag = c.insert(t);
          c.insert(first, last);

          ignore_unused_variable_warning(c);
      }
   private:
      std::pair<typename C::iterator, bool> pos_flag;
      typename C::value_type t;
      typename C::value_type* first, *last;
  };

  BOOST_concept(MultipleAssociativeContainer,(C))
    : AssociativeContainer<C>
  {
      BOOST_CONCEPT_USAGE(MultipleAssociativeContainer)
      {
          C c(first, last);

          pos = c.insert(t);
          c.insert(first, last);

          ignore_unused_variable_warning(c);
          ignore_unused_variable_warning(pos);
      }
   private:
      typename C::iterator pos;
      typename C::value_type t;
      typename C::value_type* first, *last;
  };

  BOOST_concept(SimpleAssociativeContainer,(C))
    : AssociativeContainer<C>
  {
      BOOST_CONCEPT_USAGE(SimpleAssociativeContainer)
      {
          typedef typename C::key_type key_type;
          typedef typename C::value_type value_type;
          BOOST_MPL_ASSERT((boost::is_same<key_type,value_type>));
      }
  };

  BOOST_concept(PairAssociativeContainer,(C))
    : AssociativeContainer<C>
  {
      BOOST_CONCEPT_USAGE(PairAssociativeContainer)
      {
          typedef typename C::key_type key_type;
          typedef typename C::value_type value_type;
          typedef typename C::mapped_type mapped_type;
          typedef std::pair<const key_type, mapped_type> required_value_type;
          BOOST_MPL_ASSERT((boost::is_same<value_type,required_value_type>));
      }
  };

  BOOST_concept(SortedAssociativeContainer,(C))
    : AssociativeContainer<C>
    , ReversibleContainer<C>
  {
      BOOST_CONCEPT_USAGE(SortedAssociativeContainer)
      {
          C
              c(kc),
              c2(first, last),
              c3(first, last, kc);

          p = c.upper_bound(k);
          p = c.lower_bound(k);
          r = c.equal_range(k);

          c.insert(p, t);

          ignore_unused_variable_warning(c);
          ignore_unused_variable_warning(c2);
          ignore_unused_variable_warning(c3);
          const_constraints(c);
      }

      void const_constraints(const C& c)
      {
          kc = c.key_comp();
          vc = c.value_comp();

          cp = c.upper_bound(k);
          cp = c.lower_bound(k);
          cr = c.equal_range(k);
      }

   private:
      typename C::key_compare kc;
      typename C::value_compare vc;
      typename C::value_type t;
      typename C::key_type k;
      typedef typename C::iterator iterator;
      typedef typename C::const_iterator const_iterator;

      typedef SortedAssociativeContainer self;
      iterator p;
      const_iterator cp;
      std::pair<typename self::iterator,typename self::iterator> r;
      std::pair<typename self::const_iterator,typename self::const_iterator> cr;
      typename C::value_type* first, *last;
  };

  // HashedAssociativeContainer

  BOOST_concept(Collection,(C))
  {
      BOOST_CONCEPT_USAGE(Collection)
      {
        boost::function_requires<boost::InputIteratorConcept<iterator> >();
        boost::function_requires<boost::InputIteratorConcept<const_iterator> >();
        boost::function_requires<boost::CopyConstructibleConcept<value_type> >();
        const_constraints(c);
        i = c.begin();
        i = c.end();
        c.swap(c);
      }

      void const_constraints(const C& cc) {
        ci = cc.begin();
        ci = cc.end();
        n = cc.size();
        b = cc.empty();
      }

    private:
      typedef typename C::value_type value_type;
      typedef typename C::iterator iterator;
      typedef typename C::const_iterator const_iterator;
      typedef typename C::reference reference;
      typedef typename C::const_reference const_reference;
      // typedef typename C::pointer pointer;
      typedef typename C::difference_type difference_type;
      typedef typename C::size_type size_type;

      C c;
      bool b;
      iterator i;
      const_iterator ci;
      size_type n;
  };
} // namespace boost

#if (defined _MSC_VER)
# pragma warning( pop )
#endif

# include <boost/concept/detail/concept_undef.hpp>

#endif // BOOST_CONCEPT_CHECKS_HPP