-
Notifications
You must be signed in to change notification settings - Fork 0
/
Copy pathEnum.h
1247 lines (1069 loc) · 62.9 KB
/
Enum.h
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
#ifndef ENUM_H
#define ENUM_H
#include <cstddef>
#include <cstring>
#include <iosfwd>
#include <stdexcept>
#ifdef __GNUC__
# ifdef __clang__
# if __has_feature(cxx_constexpr)
# define BETTER_ENUMS_HAVE_CONSTEXPR
# endif
# if !defined(__EXCEPTIONS) || !__has_feature(cxx_exceptions)
# define BETTER_ENUMS_NO_EXCEPTIONS
# endif
# else
# if defined(__GXX_EXPERIMENTAL_CXX0X__) || __cplusplus >= 201103L
# if (__GNUC__ > 4) || ((__GNUC__ == 4) && (__GNUC_MINOR__ >= 6))
# define BETTER_ENUMS_HAVE_CONSTEXPR
# endif
# endif
# ifndef __EXCEPTIONS
# define BETTER_ENUMS_NO_EXCEPTIONS
# endif
# endif
#endif
#ifdef _MSC_VER
# if _MSC_VER >= 1911
# define BETTER_ENUMS_HAVE_CONSTEXPR
# endif
# ifdef __clang__
# if __has_feature(cxx_constexpr)
# define BETTER_ENUMS_HAVE_CONSTEXPR
# endif
# endif
# ifndef _CPPUNWIND
# define BETTER_ENUMS_NO_EXCEPTIONS
# endif
# if _MSC_VER < 1600
# define BETTER_ENUMS_VC2008_WORKAROUNDS
# endif
#endif
#ifdef BETTER_ENUMS_CONSTEXPR
# define BETTER_ENUMS_HAVE_CONSTEXPR
#endif
#ifdef BETTER_ENUMS_NO_CONSTEXPR
# ifdef BETTER_ENUMS_HAVE_CONSTEXPR
# undef BETTER_ENUMS_HAVE_CONSTEXPR
# endif
#endif
// GCC (and maybe clang) can be made to warn about using 0 or NULL when nullptr
// is available, so Better Enums tries to use nullptr. This passage uses
// availability of constexpr as a proxy for availability of nullptr, i.e. it
// assumes that nullptr is available when compiling on the right versions of gcc
// and clang with the right -std flag. This is actually slightly wrong, because
// nullptr is also available in Visual C++, but constexpr isn't. This
// imprecision doesn't matter, however, because VC++ doesn't have the warnings
// that make using nullptr necessary.
#ifdef BETTER_ENUMS_HAVE_CONSTEXPR
# define BETTER_ENUMS_CONSTEXPR_ constexpr
# define BETTER_ENUMS_NULLPTR nullptr
#else
# define BETTER_ENUMS_CONSTEXPR_
# define BETTER_ENUMS_NULLPTR NULL
#endif
#ifndef BETTER_ENUMS_NO_EXCEPTIONS
# define BETTER_ENUMS_IF_EXCEPTIONS(x) x
#else
# define BETTER_ENUMS_IF_EXCEPTIONS(x)
#endif
#ifdef __GNUC__
# define BETTER_ENUMS_UNUSED __attribute__((__unused__))
#else
# define BETTER_ENUMS_UNUSED
#endif
// Higher-order preprocessor macros.
#ifdef BETTER_ENUMS_MACRO_FILE
# include BETTER_ENUMS_MACRO_FILE
#else
#define BETTER_ENUMS_PP_MAP(macro, data, ...) \
BETTER_ENUMS_ID( \
BETTER_ENUMS_APPLY( \
BETTER_ENUMS_PP_MAP_VAR_COUNT, \
BETTER_ENUMS_PP_COUNT(__VA_ARGS__)) \
(macro, data, __VA_ARGS__))
#define BETTER_ENUMS_PP_MAP_VAR_COUNT(count) BETTER_ENUMS_M ## count
#define BETTER_ENUMS_APPLY(macro, ...) BETTER_ENUMS_ID(macro(__VA_ARGS__))
#define BETTER_ENUMS_ID(x) x
#define BETTER_ENUMS_M1(m, d, x) m(d,0,x)
#define BETTER_ENUMS_M2(m,d,x,...) m(d,1,x) \
BETTER_ENUMS_ID(BETTER_ENUMS_M1(m,d,__VA_ARGS__))
#define BETTER_ENUMS_M3(m,d,x,...) m(d,2,x) \
BETTER_ENUMS_ID(BETTER_ENUMS_M2(m,d,__VA_ARGS__))
#define BETTER_ENUMS_M4(m,d,x,...) m(d,3,x) \
BETTER_ENUMS_ID(BETTER_ENUMS_M3(m,d,__VA_ARGS__))
#define BETTER_ENUMS_M5(m,d,x,...) m(d,4,x) \
BETTER_ENUMS_ID(BETTER_ENUMS_M4(m,d,__VA_ARGS__))
#define BETTER_ENUMS_M6(m,d,x,...) m(d,5,x) \
BETTER_ENUMS_ID(BETTER_ENUMS_M5(m,d,__VA_ARGS__))
#define BETTER_ENUMS_M7(m,d,x,...) m(d,6,x) \
BETTER_ENUMS_ID(BETTER_ENUMS_M6(m,d,__VA_ARGS__))
#define BETTER_ENUMS_M8(m,d,x,...) m(d,7,x) \
BETTER_ENUMS_ID(BETTER_ENUMS_M7(m,d,__VA_ARGS__))
#define BETTER_ENUMS_M9(m,d,x,...) m(d,8,x) \
BETTER_ENUMS_ID(BETTER_ENUMS_M8(m,d,__VA_ARGS__))
#define BETTER_ENUMS_M10(m,d,x,...) m(d,9,x) \
BETTER_ENUMS_ID(BETTER_ENUMS_M9(m,d,__VA_ARGS__))
#define BETTER_ENUMS_M11(m,d,x,...) m(d,10,x) \
BETTER_ENUMS_ID(BETTER_ENUMS_M10(m,d,__VA_ARGS__))
#define BETTER_ENUMS_M12(m,d,x,...) m(d,11,x) \
BETTER_ENUMS_ID(BETTER_ENUMS_M11(m,d,__VA_ARGS__))
#define BETTER_ENUMS_M13(m,d,x,...) m(d,12,x) \
BETTER_ENUMS_ID(BETTER_ENUMS_M12(m,d,__VA_ARGS__))
#define BETTER_ENUMS_M14(m,d,x,...) m(d,13,x) \
BETTER_ENUMS_ID(BETTER_ENUMS_M13(m,d,__VA_ARGS__))
#define BETTER_ENUMS_M15(m,d,x,...) m(d,14,x) \
BETTER_ENUMS_ID(BETTER_ENUMS_M14(m,d,__VA_ARGS__))
#define BETTER_ENUMS_M16(m,d,x,...) m(d,15,x) \
BETTER_ENUMS_ID(BETTER_ENUMS_M15(m,d,__VA_ARGS__))
#define BETTER_ENUMS_M17(m,d,x,...) m(d,16,x) \
BETTER_ENUMS_ID(BETTER_ENUMS_M16(m,d,__VA_ARGS__))
#define BETTER_ENUMS_M18(m,d,x,...) m(d,17,x) \
BETTER_ENUMS_ID(BETTER_ENUMS_M17(m,d,__VA_ARGS__))
#define BETTER_ENUMS_M19(m,d,x,...) m(d,18,x) \
BETTER_ENUMS_ID(BETTER_ENUMS_M18(m,d,__VA_ARGS__))
#define BETTER_ENUMS_M20(m,d,x,...) m(d,19,x) \
BETTER_ENUMS_ID(BETTER_ENUMS_M19(m,d,__VA_ARGS__))
#define BETTER_ENUMS_M21(m,d,x,...) m(d,20,x) \
BETTER_ENUMS_ID(BETTER_ENUMS_M20(m,d,__VA_ARGS__))
#define BETTER_ENUMS_M22(m,d,x,...) m(d,21,x) \
BETTER_ENUMS_ID(BETTER_ENUMS_M21(m,d,__VA_ARGS__))
#define BETTER_ENUMS_M23(m,d,x,...) m(d,22,x) \
BETTER_ENUMS_ID(BETTER_ENUMS_M22(m,d,__VA_ARGS__))
#define BETTER_ENUMS_M24(m,d,x,...) m(d,23,x) \
BETTER_ENUMS_ID(BETTER_ENUMS_M23(m,d,__VA_ARGS__))
#define BETTER_ENUMS_M25(m,d,x,...) m(d,24,x) \
BETTER_ENUMS_ID(BETTER_ENUMS_M24(m,d,__VA_ARGS__))
#define BETTER_ENUMS_M26(m,d,x,...) m(d,25,x) \
BETTER_ENUMS_ID(BETTER_ENUMS_M25(m,d,__VA_ARGS__))
#define BETTER_ENUMS_M27(m,d,x,...) m(d,26,x) \
BETTER_ENUMS_ID(BETTER_ENUMS_M26(m,d,__VA_ARGS__))
#define BETTER_ENUMS_M28(m,d,x,...) m(d,27,x) \
BETTER_ENUMS_ID(BETTER_ENUMS_M27(m,d,__VA_ARGS__))
#define BETTER_ENUMS_M29(m,d,x,...) m(d,28,x) \
BETTER_ENUMS_ID(BETTER_ENUMS_M28(m,d,__VA_ARGS__))
#define BETTER_ENUMS_M30(m,d,x,...) m(d,29,x) \
BETTER_ENUMS_ID(BETTER_ENUMS_M29(m,d,__VA_ARGS__))
#define BETTER_ENUMS_M31(m,d,x,...) m(d,30,x) \
BETTER_ENUMS_ID(BETTER_ENUMS_M30(m,d,__VA_ARGS__))
#define BETTER_ENUMS_M32(m,d,x,...) m(d,31,x) \
BETTER_ENUMS_ID(BETTER_ENUMS_M31(m,d,__VA_ARGS__))
#define BETTER_ENUMS_M33(m,d,x,...) m(d,32,x) \
BETTER_ENUMS_ID(BETTER_ENUMS_M32(m,d,__VA_ARGS__))
#define BETTER_ENUMS_M34(m,d,x,...) m(d,33,x) \
BETTER_ENUMS_ID(BETTER_ENUMS_M33(m,d,__VA_ARGS__))
#define BETTER_ENUMS_M35(m,d,x,...) m(d,34,x) \
BETTER_ENUMS_ID(BETTER_ENUMS_M34(m,d,__VA_ARGS__))
#define BETTER_ENUMS_M36(m,d,x,...) m(d,35,x) \
BETTER_ENUMS_ID(BETTER_ENUMS_M35(m,d,__VA_ARGS__))
#define BETTER_ENUMS_M37(m,d,x,...) m(d,36,x) \
BETTER_ENUMS_ID(BETTER_ENUMS_M36(m,d,__VA_ARGS__))
#define BETTER_ENUMS_M38(m,d,x,...) m(d,37,x) \
BETTER_ENUMS_ID(BETTER_ENUMS_M37(m,d,__VA_ARGS__))
#define BETTER_ENUMS_M39(m,d,x,...) m(d,38,x) \
BETTER_ENUMS_ID(BETTER_ENUMS_M38(m,d,__VA_ARGS__))
#define BETTER_ENUMS_M40(m,d,x,...) m(d,39,x) \
BETTER_ENUMS_ID(BETTER_ENUMS_M39(m,d,__VA_ARGS__))
#define BETTER_ENUMS_M41(m,d,x,...) m(d,40,x) \
BETTER_ENUMS_ID(BETTER_ENUMS_M40(m,d,__VA_ARGS__))
#define BETTER_ENUMS_M42(m,d,x,...) m(d,41,x) \
BETTER_ENUMS_ID(BETTER_ENUMS_M41(m,d,__VA_ARGS__))
#define BETTER_ENUMS_M43(m,d,x,...) m(d,42,x) \
BETTER_ENUMS_ID(BETTER_ENUMS_M42(m,d,__VA_ARGS__))
#define BETTER_ENUMS_M44(m,d,x,...) m(d,43,x) \
BETTER_ENUMS_ID(BETTER_ENUMS_M43(m,d,__VA_ARGS__))
#define BETTER_ENUMS_M45(m,d,x,...) m(d,44,x) \
BETTER_ENUMS_ID(BETTER_ENUMS_M44(m,d,__VA_ARGS__))
#define BETTER_ENUMS_M46(m,d,x,...) m(d,45,x) \
BETTER_ENUMS_ID(BETTER_ENUMS_M45(m,d,__VA_ARGS__))
#define BETTER_ENUMS_M47(m,d,x,...) m(d,46,x) \
BETTER_ENUMS_ID(BETTER_ENUMS_M46(m,d,__VA_ARGS__))
#define BETTER_ENUMS_M48(m,d,x,...) m(d,47,x) \
BETTER_ENUMS_ID(BETTER_ENUMS_M47(m,d,__VA_ARGS__))
#define BETTER_ENUMS_M49(m,d,x,...) m(d,48,x) \
BETTER_ENUMS_ID(BETTER_ENUMS_M48(m,d,__VA_ARGS__))
#define BETTER_ENUMS_M50(m,d,x,...) m(d,49,x) \
BETTER_ENUMS_ID(BETTER_ENUMS_M49(m,d,__VA_ARGS__))
#define BETTER_ENUMS_M51(m,d,x,...) m(d,50,x) \
BETTER_ENUMS_ID(BETTER_ENUMS_M50(m,d,__VA_ARGS__))
#define BETTER_ENUMS_M52(m,d,x,...) m(d,51,x) \
BETTER_ENUMS_ID(BETTER_ENUMS_M51(m,d,__VA_ARGS__))
#define BETTER_ENUMS_M53(m,d,x,...) m(d,52,x) \
BETTER_ENUMS_ID(BETTER_ENUMS_M52(m,d,__VA_ARGS__))
#define BETTER_ENUMS_M54(m,d,x,...) m(d,53,x) \
BETTER_ENUMS_ID(BETTER_ENUMS_M53(m,d,__VA_ARGS__))
#define BETTER_ENUMS_M55(m,d,x,...) m(d,54,x) \
BETTER_ENUMS_ID(BETTER_ENUMS_M54(m,d,__VA_ARGS__))
#define BETTER_ENUMS_M56(m,d,x,...) m(d,55,x) \
BETTER_ENUMS_ID(BETTER_ENUMS_M55(m,d,__VA_ARGS__))
#define BETTER_ENUMS_M57(m,d,x,...) m(d,56,x) \
BETTER_ENUMS_ID(BETTER_ENUMS_M56(m,d,__VA_ARGS__))
#define BETTER_ENUMS_M58(m,d,x,...) m(d,57,x) \
BETTER_ENUMS_ID(BETTER_ENUMS_M57(m,d,__VA_ARGS__))
#define BETTER_ENUMS_M59(m,d,x,...) m(d,58,x) \
BETTER_ENUMS_ID(BETTER_ENUMS_M58(m,d,__VA_ARGS__))
#define BETTER_ENUMS_M60(m,d,x,...) m(d,59,x) \
BETTER_ENUMS_ID(BETTER_ENUMS_M59(m,d,__VA_ARGS__))
#define BETTER_ENUMS_M61(m,d,x,...) m(d,60,x) \
BETTER_ENUMS_ID(BETTER_ENUMS_M60(m,d,__VA_ARGS__))
#define BETTER_ENUMS_M62(m,d,x,...) m(d,61,x) \
BETTER_ENUMS_ID(BETTER_ENUMS_M61(m,d,__VA_ARGS__))
#define BETTER_ENUMS_M63(m,d,x,...) m(d,62,x) \
BETTER_ENUMS_ID(BETTER_ENUMS_M62(m,d,__VA_ARGS__))
#define BETTER_ENUMS_M64(m,d,x,...) m(d,63,x) \
BETTER_ENUMS_ID(BETTER_ENUMS_M63(m,d,__VA_ARGS__))
#define BETTER_ENUMS_PP_COUNT_IMPL(_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, count, ...) count
#define BETTER_ENUMS_PP_COUNT(...) \
BETTER_ENUMS_ID(BETTER_ENUMS_PP_COUNT_IMPL(__VA_ARGS__, 64, 63, 62, 61, 60,\
59, 58, 57, 56, 55, 54, 53, 52, 51, 50, 49, 48, 47, 46, 45, 44, 43, 42,\
41, 40, 39, 38, 37, 36, 35, 34, 33, 32, 31, 30, 29, 28, 27, 26, 25, 24,\
23, 22, 21, 20, 19, 18, 17, 16, 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, \
4, 3, 2, 1))
#define BETTER_ENUMS_ITERATE(X, f, l) X(f, l, 0) X(f, l, 1) X(f, l, 2) \
X(f, l, 3) X(f, l, 4) X(f, l, 5) X(f, l, 6) X(f, l, 7) X(f, l, 8) \
X(f, l, 9) X(f, l, 10) X(f, l, 11) X(f, l, 12) X(f, l, 13) X(f, l, 14) \
X(f, l, 15) X(f, l, 16) X(f, l, 17) X(f, l, 18) X(f, l, 19) X(f, l, 20) \
X(f, l, 21) X(f, l, 22) X(f, l, 23)
#endif // #ifdef BETTER_ENUMS_MACRO_FILE else case
namespace better_enums {
// Optional type.
template <typename T>
BETTER_ENUMS_CONSTEXPR_ inline T _default()
{
return static_cast<typename T::_enumerated>(0);
}
template <>
BETTER_ENUMS_CONSTEXPR_ inline const char* _default<const char*>()
{
return BETTER_ENUMS_NULLPTR;
}
template <>
BETTER_ENUMS_CONSTEXPR_ inline std::size_t _default<std::size_t>()
{
return 0;
}
template <typename T>
struct optional {
BETTER_ENUMS_CONSTEXPR_ optional() :
_valid(false), _value(_default<T>()) { }
BETTER_ENUMS_CONSTEXPR_ optional(T v) : _valid(true), _value(v) { }
BETTER_ENUMS_CONSTEXPR_ const T& operator *() const { return _value; }
BETTER_ENUMS_CONSTEXPR_ const T* operator ->() const { return &_value; }
BETTER_ENUMS_CONSTEXPR_ operator bool() const { return _valid; }
BETTER_ENUMS_CONSTEXPR_ const T& value() const { return _value; }
private:
bool _valid;
T _value;
};
template <typename CastTo, typename Element>
BETTER_ENUMS_CONSTEXPR_ static optional<CastTo>
_map_index(const Element *array, optional<std::size_t> index)
{
return index ? static_cast<CastTo>(array[*index]) : optional<CastTo>();
}
#ifdef BETTER_ENUMS_VC2008_WORKAROUNDS
#define BETTER_ENUMS_OR_THROW \
if (!maybe) \
throw std::runtime_error(message); \
\
return *maybe;
#else
#define BETTER_ENUMS_OR_THROW \
return maybe ? *maybe : throw std::runtime_error(message);
#endif
BETTER_ENUMS_IF_EXCEPTIONS(
template <typename T>
BETTER_ENUMS_CONSTEXPR_ static T _or_throw(optional<T> maybe,
const char *message)
{
BETTER_ENUMS_OR_THROW
}
)
template <typename T>
BETTER_ENUMS_CONSTEXPR_ static T* _or_null(optional<T*> maybe)
{
return maybe ? *maybe : BETTER_ENUMS_NULLPTR;
}
template <typename T>
BETTER_ENUMS_CONSTEXPR_ static T _or_zero(optional<T> maybe)
{
return maybe ? *maybe : T::_from_integral_unchecked(0);
}
// Functional sequencing. This is essentially a comma operator wrapped in a
// constexpr function. g++ 4.7 doesn't "accept" integral constants in the second
// position for the comma operator, and emits an external symbol, which then
// causes a linking error.
template <typename T, typename U>
BETTER_ENUMS_CONSTEXPR_ U
continue_with(T, U value) { return value; }
// Values array declaration helper.
template <typename EnumType>
struct _eat_assign {
explicit BETTER_ENUMS_CONSTEXPR_ _eat_assign(EnumType value) : _value(value)
{ }
template <typename Any>
BETTER_ENUMS_CONSTEXPR_ const _eat_assign&
operator =(Any) const { return *this; }
BETTER_ENUMS_CONSTEXPR_ operator EnumType () const { return _value; }
private:
EnumType _value;
};
// Iterables.
template <typename Element>
struct _iterable {
typedef const Element* iterator;
BETTER_ENUMS_CONSTEXPR_ iterator begin() const { return iterator(_array); }
BETTER_ENUMS_CONSTEXPR_ iterator end() const
{ return iterator(_array + _size); }
BETTER_ENUMS_CONSTEXPR_ std::size_t size() const { return _size; }
BETTER_ENUMS_CONSTEXPR_ const Element& operator [](std::size_t index) const
{ return _array[index]; }
BETTER_ENUMS_CONSTEXPR_ _iterable(const Element *array, std::size_t s) :
_array(array), _size(s) { }
private:
const Element * const _array;
const std::size_t _size;
};
// String routines.
BETTER_ENUMS_CONSTEXPR_ static const char *_name_enders = "= \t\n";
BETTER_ENUMS_CONSTEXPR_ inline bool _ends_name(char c, std::size_t index = 0)
{
return
c == _name_enders[index] ? true :
_name_enders[index] == '\0' ? false :
_ends_name(c, index + 1);
}
BETTER_ENUMS_CONSTEXPR_ inline bool _has_initializer(const char *s,
std::size_t index = 0)
{
return
s[index] == '\0' ? false :
s[index] == '=' ? true :
_has_initializer(s, index + 1);
}
BETTER_ENUMS_CONSTEXPR_ inline std::size_t
_constant_length(const char *s, std::size_t index = 0)
{
return _ends_name(s[index]) ? index : _constant_length(s, index + 1);
}
BETTER_ENUMS_CONSTEXPR_ inline char
_select(const char *from, std::size_t from_length, std::size_t index)
{
return index >= from_length ? '\0' : from[index];
}
BETTER_ENUMS_CONSTEXPR_ inline char _to_lower_ascii(char c)
{
return c >= 0x41 && c <= 0x5A ? static_cast<char>(c + 0x20) : c;
}
BETTER_ENUMS_CONSTEXPR_ inline bool _names_match(const char *stringizedName,
const char *referenceName,
std::size_t index = 0)
{
return
_ends_name(stringizedName[index]) ? referenceName[index] == '\0' :
referenceName[index] == '\0' ? false :
stringizedName[index] != referenceName[index] ? false :
_names_match(stringizedName, referenceName, index + 1);
}
BETTER_ENUMS_CONSTEXPR_ inline bool
_names_match_nocase(const char *stringizedName, const char *referenceName,
std::size_t index = 0)
{
return
_ends_name(stringizedName[index]) ? referenceName[index] == '\0' :
referenceName[index] == '\0' ? false :
_to_lower_ascii(stringizedName[index]) !=
_to_lower_ascii(referenceName[index]) ? false :
_names_match_nocase(stringizedName, referenceName, index + 1);
}
inline void _trim_names(const char * const *raw_names,
const char **trimmed_names,
char *storage, std::size_t count)
{
std::size_t offset = 0;
for (std::size_t index = 0; index < count; ++index) {
trimmed_names[index] = storage + offset;
std::size_t trimmed_length =
std::strcspn(raw_names[index], _name_enders);
storage[offset + trimmed_length] = '\0';
std::size_t raw_length = std::strlen(raw_names[index]);
offset += raw_length + 1;
}
}
// Eager initialization.
template <typename Enum>
struct _initialize_at_program_start {
_initialize_at_program_start() { Enum::initialize(); }
};
} // namespace better_enums
// Array generation macros.
#define BETTER_ENUMS_EAT_ASSIGN_SINGLE(EnumType, index, expression) \
(EnumType)((::better_enums::_eat_assign<EnumType>)EnumType::expression),
#define BETTER_ENUMS_EAT_ASSIGN(EnumType, ...) \
BETTER_ENUMS_ID( \
BETTER_ENUMS_PP_MAP( \
BETTER_ENUMS_EAT_ASSIGN_SINGLE, EnumType, __VA_ARGS__))
#ifdef BETTER_ENUMS_HAVE_CONSTEXPR
#define BETTER_ENUMS_SELECT_SINGLE_CHARACTER(from, from_length, index) \
::better_enums::_select(from, from_length, index),
#define BETTER_ENUMS_SELECT_CHARACTERS(from, from_length) \
BETTER_ENUMS_ITERATE( \
BETTER_ENUMS_SELECT_SINGLE_CHARACTER, from, from_length)
#define BETTER_ENUMS_TRIM_SINGLE_STRING(ignored, index, expression) \
constexpr std::size_t _length_ ## index = \
::better_enums::_constant_length(#expression); \
constexpr const char _trimmed_ ## index [] = \
{ BETTER_ENUMS_SELECT_CHARACTERS(#expression, _length_ ## index) }; \
constexpr const char *_final_ ## index = \
::better_enums::_has_initializer(#expression) ? \
_trimmed_ ## index : #expression;
#define BETTER_ENUMS_TRIM_STRINGS(...) \
BETTER_ENUMS_ID( \
BETTER_ENUMS_PP_MAP( \
BETTER_ENUMS_TRIM_SINGLE_STRING, ignored, __VA_ARGS__))
#define BETTER_ENUMS_REFER_TO_SINGLE_STRING(ignored, index, expression) \
_final_ ## index,
#define BETTER_ENUMS_REFER_TO_STRINGS(...) \
BETTER_ENUMS_ID( \
BETTER_ENUMS_PP_MAP( \
BETTER_ENUMS_REFER_TO_SINGLE_STRING, ignored, __VA_ARGS__))
#endif // #ifdef BETTER_ENUMS_HAVE_CONSTEXPR
#define BETTER_ENUMS_STRINGIZE_SINGLE(ignored, index, expression) #expression,
#define BETTER_ENUMS_STRINGIZE(...) \
BETTER_ENUMS_ID( \
BETTER_ENUMS_PP_MAP( \
BETTER_ENUMS_STRINGIZE_SINGLE, ignored, __VA_ARGS__))
#define BETTER_ENUMS_RESERVE_STORAGE_SINGLE(ignored, index, expression) \
#expression ","
#define BETTER_ENUMS_RESERVE_STORAGE(...) \
BETTER_ENUMS_ID( \
BETTER_ENUMS_PP_MAP( \
BETTER_ENUMS_RESERVE_STORAGE_SINGLE, ignored, __VA_ARGS__))
// The enums proper.
#define BETTER_ENUMS_NS(EnumType) better_enums_data_ ## EnumType
#ifdef BETTER_ENUMS_VC2008_WORKAROUNDS
#define BETTER_ENUMS_COPY_CONSTRUCTOR(Enum) \
BETTER_ENUMS_CONSTEXPR_ Enum(const Enum &other) : \
_value(other._value) { }
#else
#define BETTER_ENUMS_COPY_CONSTRUCTOR(Enum)
#endif
#define BETTER_ENUMS_TYPE(SetUnderlyingType, SwitchType, GenerateSwitchType, \
GenerateStrings, ToStringConstexpr, \
DeclareInitialize, DefineInitialize, CallInitialize, \
Enum, Underlying, ...) \
\
namespace better_enums_data_ ## Enum { \
\
BETTER_ENUMS_ID(GenerateSwitchType(Underlying, __VA_ARGS__)) \
\
} \
\
class Enum { \
private: \
typedef ::better_enums::optional<Enum> _optional; \
typedef ::better_enums::optional<std::size_t> _optional_index; \
\
public: \
typedef Underlying _integral; \
\
enum _enumerated SetUnderlyingType(Underlying) { __VA_ARGS__ }; \
\
BETTER_ENUMS_CONSTEXPR_ Enum(_enumerated value) : _value(value) { } \
\
BETTER_ENUMS_COPY_CONSTRUCTOR(Enum) \
\
BETTER_ENUMS_CONSTEXPR_ operator SwitchType(Enum)() const \
{ \
return SwitchType(Enum)(_value); \
} \
\
BETTER_ENUMS_CONSTEXPR_ _integral _to_integral() const; \
BETTER_ENUMS_IF_EXCEPTIONS( \
BETTER_ENUMS_CONSTEXPR_ static Enum _from_integral(_integral value); \
) \
BETTER_ENUMS_CONSTEXPR_ static Enum \
_from_integral_unchecked(_integral value); \
BETTER_ENUMS_CONSTEXPR_ static _optional \
_from_integral_nothrow(_integral value); \
\
BETTER_ENUMS_CONSTEXPR_ std::size_t _to_index() const; \
BETTER_ENUMS_IF_EXCEPTIONS( \
BETTER_ENUMS_CONSTEXPR_ static Enum _from_index(std::size_t value); \
) \
BETTER_ENUMS_CONSTEXPR_ static Enum \
_from_index_unchecked(std::size_t value); \
BETTER_ENUMS_CONSTEXPR_ static _optional \
_from_index_nothrow(std::size_t value); \
\
ToStringConstexpr const char* _to_string() const; \
BETTER_ENUMS_IF_EXCEPTIONS( \
BETTER_ENUMS_CONSTEXPR_ static Enum _from_string(const char *name); \
) \
BETTER_ENUMS_CONSTEXPR_ static _optional \
_from_string_nothrow(const char *name); \
\
BETTER_ENUMS_IF_EXCEPTIONS( \
BETTER_ENUMS_CONSTEXPR_ static Enum _from_string_nocase(const char *name); \
) \
BETTER_ENUMS_CONSTEXPR_ static _optional \
_from_string_nocase_nothrow(const char *name); \
\
BETTER_ENUMS_CONSTEXPR_ static bool _is_valid(_integral value); \
BETTER_ENUMS_CONSTEXPR_ static bool _is_valid(const char *name); \
BETTER_ENUMS_CONSTEXPR_ static bool _is_valid_nocase(const char *name); \
\
typedef ::better_enums::_iterable<Enum> _value_iterable; \
typedef ::better_enums::_iterable<const char*> _name_iterable; \
\
typedef _value_iterable::iterator _value_iterator; \
typedef _name_iterable::iterator _name_iterator; \
\
BETTER_ENUMS_CONSTEXPR_ static const std::size_t _size_constant = \
BETTER_ENUMS_ID(BETTER_ENUMS_PP_COUNT(__VA_ARGS__)); \
BETTER_ENUMS_CONSTEXPR_ static std::size_t _size() \
{ return _size_constant; } \
\
BETTER_ENUMS_CONSTEXPR_ static const char* _name(); \
BETTER_ENUMS_CONSTEXPR_ static _value_iterable _values(); \
ToStringConstexpr static _name_iterable _names(); \
\
_integral _value; \
\
BETTER_ENUMS_DEFAULT_CONSTRUCTOR(Enum) \
\
private: \
explicit BETTER_ENUMS_CONSTEXPR_ Enum(const _integral &value) : \
_value(value) { } \
\
DeclareInitialize \
\
BETTER_ENUMS_CONSTEXPR_ static _optional_index \
_from_value_loop(_integral value, std::size_t index = 0); \
BETTER_ENUMS_CONSTEXPR_ static _optional_index \
_from_string_loop(const char *name, std::size_t index = 0); \
BETTER_ENUMS_CONSTEXPR_ static _optional_index \
_from_string_nocase_loop(const char *name, std::size_t index = 0); \
\
friend struct ::better_enums::_initialize_at_program_start<Enum>; \
}; \
\
namespace better_enums_data_ ## Enum { \
\
static ::better_enums::_initialize_at_program_start<Enum> \
_force_initialization; \
\
enum _putNamesInThisScopeAlso { __VA_ARGS__ }; \
\
BETTER_ENUMS_CONSTEXPR_ const Enum _value_array[] = \
{ BETTER_ENUMS_ID(BETTER_ENUMS_EAT_ASSIGN(Enum, __VA_ARGS__)) }; \
\
BETTER_ENUMS_ID(GenerateStrings(Enum, __VA_ARGS__)) \
\
} \
\
BETTER_ENUMS_UNUSED BETTER_ENUMS_CONSTEXPR_ \
inline const Enum \
operator +(Enum::_enumerated enumerated) \
{ \
return static_cast<Enum>(enumerated); \
} \
\
BETTER_ENUMS_CONSTEXPR_ inline Enum::_optional_index \
Enum::_from_value_loop(Enum::_integral value, std::size_t index) \
{ \
return \
index == _size() ? \
_optional_index() : \
BETTER_ENUMS_NS(Enum)::_value_array[index]._value == value ? \
_optional_index(index) : \
_from_value_loop(value, index + 1); \
} \
\
BETTER_ENUMS_CONSTEXPR_ inline Enum::_optional_index \
Enum::_from_string_loop(const char *name, std::size_t index) \
{ \
return \
index == _size() ? _optional_index() : \
::better_enums::_names_match( \
BETTER_ENUMS_NS(Enum)::_raw_names()[index], name) ? \
_optional_index(index) : \
_from_string_loop(name, index + 1); \
} \
\
BETTER_ENUMS_CONSTEXPR_ inline Enum::_optional_index \
Enum::_from_string_nocase_loop(const char *name, std::size_t index) \
{ \
return \
index == _size() ? _optional_index() : \
::better_enums::_names_match_nocase( \
BETTER_ENUMS_NS(Enum)::_raw_names()[index], name) ? \
_optional_index(index) : \
_from_string_nocase_loop(name, index + 1); \
} \
\
BETTER_ENUMS_CONSTEXPR_ inline Enum::_integral Enum::_to_integral() const \
{ \
return _integral(_value); \
} \
\
BETTER_ENUMS_CONSTEXPR_ inline std::size_t Enum::_to_index() const \
{ \
return *_from_value_loop(_value); \
} \
\
BETTER_ENUMS_CONSTEXPR_ inline Enum \
Enum::_from_index_unchecked(std::size_t index) \
{ \
return \
::better_enums::_or_zero(_from_index_nothrow(index)); \
} \
\
BETTER_ENUMS_CONSTEXPR_ inline Enum::_optional \
Enum::_from_index_nothrow(std::size_t index) \
{ \
return \
index >= _size() ? \
_optional() : \
_optional(BETTER_ENUMS_NS(Enum)::_value_array[index]); \
} \
\
BETTER_ENUMS_IF_EXCEPTIONS( \
BETTER_ENUMS_CONSTEXPR_ inline Enum Enum::_from_index(std::size_t index) \
{ \
return \
::better_enums::_or_throw(_from_index_nothrow(index), \
#Enum "::_from_index: invalid argument"); \
} \
) \
\
BETTER_ENUMS_CONSTEXPR_ inline Enum \
Enum::_from_integral_unchecked(_integral value) \
{ \
return static_cast<_enumerated>(value); \
} \
\
BETTER_ENUMS_CONSTEXPR_ inline Enum::_optional \
Enum::_from_integral_nothrow(_integral value) \
{ \
return \
::better_enums::_map_index<Enum>(BETTER_ENUMS_NS(Enum)::_value_array, \
_from_value_loop(value)); \
} \
\
BETTER_ENUMS_IF_EXCEPTIONS( \
BETTER_ENUMS_CONSTEXPR_ inline Enum Enum::_from_integral(_integral value) \
{ \
return \
::better_enums::_or_throw(_from_integral_nothrow(value), \
#Enum "::_from_integral: invalid argument"); \
} \
) \
\
ToStringConstexpr inline const char* Enum::_to_string() const \
{ \
return \
::better_enums::_or_null( \
::better_enums::_map_index<const char*>( \
BETTER_ENUMS_NS(Enum)::_name_array(), \
_from_value_loop(CallInitialize(_value)))); \
} \
\
BETTER_ENUMS_CONSTEXPR_ inline Enum::_optional \
Enum::_from_string_nothrow(const char *name) \
{ \
return \
::better_enums::_map_index<Enum>( \
BETTER_ENUMS_NS(Enum)::_value_array, _from_string_loop(name)); \
} \
\
BETTER_ENUMS_IF_EXCEPTIONS( \
BETTER_ENUMS_CONSTEXPR_ inline Enum Enum::_from_string(const char *name) \
{ \
return \
::better_enums::_or_throw(_from_string_nothrow(name), \
#Enum "::_from_string: invalid argument"); \
} \
) \
\
BETTER_ENUMS_CONSTEXPR_ inline Enum::_optional \
Enum::_from_string_nocase_nothrow(const char *name) \
{ \
return \
::better_enums::_map_index<Enum>(BETTER_ENUMS_NS(Enum)::_value_array, \
_from_string_nocase_loop(name)); \
} \
\
BETTER_ENUMS_IF_EXCEPTIONS( \
BETTER_ENUMS_CONSTEXPR_ inline Enum Enum::_from_string_nocase(const char *name)\
{ \
return \
::better_enums::_or_throw( \
_from_string_nocase_nothrow(name), \
#Enum "::_from_string_nocase: invalid argument"); \
} \
) \
\
BETTER_ENUMS_CONSTEXPR_ inline bool Enum::_is_valid(_integral value) \
{ \
return _from_value_loop(value); \
} \
\
BETTER_ENUMS_CONSTEXPR_ inline bool Enum::_is_valid(const char *name) \
{ \
return _from_string_loop(name); \
} \
\
BETTER_ENUMS_CONSTEXPR_ inline bool Enum::_is_valid_nocase(const char *name) \
{ \
return _from_string_nocase_loop(name); \
} \
\
BETTER_ENUMS_CONSTEXPR_ inline const char* Enum::_name() \
{ \
return #Enum; \
} \
\
BETTER_ENUMS_CONSTEXPR_ inline Enum::_value_iterable Enum::_values() \
{ \
return _value_iterable(BETTER_ENUMS_NS(Enum)::_value_array, _size()); \
} \
\
ToStringConstexpr inline Enum::_name_iterable Enum::_names() \
{ \
return \
_name_iterable(BETTER_ENUMS_NS(Enum)::_name_array(), \
CallInitialize(_size())); \
} \
\
DefineInitialize(Enum) \
\
BETTER_ENUMS_UNUSED BETTER_ENUMS_CONSTEXPR_ \
inline bool operator ==(const Enum &a, const Enum &b) \
{ return a._to_integral() == b._to_integral(); } \
\
BETTER_ENUMS_UNUSED BETTER_ENUMS_CONSTEXPR_ \
inline bool operator !=(const Enum &a, const Enum &b) \
{ return a._to_integral() != b._to_integral(); } \
\
BETTER_ENUMS_UNUSED BETTER_ENUMS_CONSTEXPR_ \
inline bool operator <(const Enum &a, const Enum &b) \
{ return a._to_integral() < b._to_integral(); } \
\
BETTER_ENUMS_UNUSED BETTER_ENUMS_CONSTEXPR_ \
inline bool operator <=(const Enum &a, const Enum &b) \
{ return a._to_integral() <= b._to_integral(); } \
\
BETTER_ENUMS_UNUSED BETTER_ENUMS_CONSTEXPR_ \
inline bool operator >(const Enum &a, const Enum &b) \
{ return a._to_integral() > b._to_integral(); } \
\
BETTER_ENUMS_UNUSED BETTER_ENUMS_CONSTEXPR_ \
inline bool operator >=(const Enum &a, const Enum &b) \
{ return a._to_integral() >= b._to_integral(); } \
\
\
template <typename Char, typename Traits> \
std::basic_ostream<Char, Traits>& \
operator <<(std::basic_ostream<Char, Traits>& stream, const Enum &value) \
{ \
return stream << value._to_string(); \
} \
\
template <typename Char, typename Traits> \
std::basic_istream<Char, Traits>& \
operator >>(std::basic_istream<Char, Traits>& stream, Enum &value) \
{ \
std::basic_string<Char, Traits> buffer; \
\
stream >> buffer; \
::better_enums::optional<Enum> converted = \
Enum::_from_string_nothrow(buffer.c_str()); \
\
if (converted) \
value = *converted; \
else \
stream.setstate(std::basic_istream<Char, Traits>::failbit); \
\
return stream; \
}
// Enum feature options.
// C++98, C++11
#define BETTER_ENUMS_CXX98_UNDERLYING_TYPE(Underlying)
// C++11
#define BETTER_ENUMS_CXX11_UNDERLYING_TYPE(Underlying) \
: Underlying
#if defined(_MSC_VER) && _MSC_VER >= 1700
// VS 2012 and above fully support strongly typed enums and will warn about
// incorrect usage.
# define BETTER_ENUMS_LEGACY_UNDERLYING_TYPE(Underlying) \
BETTER_ENUMS_CXX11_UNDERLYING_TYPE(Underlying)
#else
# define BETTER_ENUMS_LEGACY_UNDERLYING_TYPE(Underlying) \
BETTER_ENUMS_CXX98_UNDERLYING_TYPE(Underlying)
#endif
// C++98, C++11
#define BETTER_ENUMS_REGULAR_ENUM_SWITCH_TYPE(Type) \
_enumerated
// C++11
#define BETTER_ENUMS_ENUM_CLASS_SWITCH_TYPE(Type) \
BETTER_ENUMS_NS(Type)::_enumClassForSwitchStatements
// C++98, C++11
#define BETTER_ENUMS_REGULAR_ENUM_SWITCH_TYPE_GENERATE(Underlying, ...)
// C++11
#define BETTER_ENUMS_ENUM_CLASS_SWITCH_TYPE_GENERATE(Underlying, ...) \
enum class _enumClassForSwitchStatements : Underlying { __VA_ARGS__ };
// C++98
#define BETTER_ENUMS_CXX98_TRIM_STRINGS_ARRAYS(Enum, ...) \
inline const char** _raw_names() \
{ \
static const char *value[] = \
{ BETTER_ENUMS_ID(BETTER_ENUMS_STRINGIZE(__VA_ARGS__)) }; \
return value; \
} \
\
inline char* _name_storage() \
{ \
static char storage[] = \
BETTER_ENUMS_ID(BETTER_ENUMS_RESERVE_STORAGE(__VA_ARGS__)); \
return storage; \
} \
\
inline const char** _name_array() \
{ \
static const char *value[Enum::_size_constant]; \
return value; \
} \
\
inline bool& _initialized() \
{ \
static bool value = false; \
return value; \
}
// C++11 fast version
#define BETTER_ENUMS_CXX11_PARTIAL_CONSTEXPR_TRIM_STRINGS_ARRAYS(Enum, ...) \
constexpr const char *_the_raw_names[] = \
{ BETTER_ENUMS_ID(BETTER_ENUMS_STRINGIZE(__VA_ARGS__)) }; \
\
constexpr const char * const * _raw_names() \
{ \
return _the_raw_names; \
} \
\
inline char* _name_storage() \
{ \
static char storage[] = \
BETTER_ENUMS_ID(BETTER_ENUMS_RESERVE_STORAGE(__VA_ARGS__)); \
return storage; \
} \
\
inline const char** _name_array() \
{ \
static const char *value[Enum::_size_constant]; \
return value; \
} \