-
Notifications
You must be signed in to change notification settings - Fork 2.1k
/
Copy pathcommon.h
1266 lines (1122 loc) · 52.6 KB
/
common.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
/*
pybind11/detail/common.h -- Basic macros
Copyright (c) 2016 Wenzel Jakob <wenzel.jakob@epfl.ch>
All rights reserved. Use of this source code is governed by a
BSD-style license that can be found in the LICENSE file.
*/
#pragma once
#define PYBIND11_VERSION_MAJOR 2
#define PYBIND11_VERSION_MINOR 13
#define PYBIND11_VERSION_PATCH 0.dev1
// Similar to Python's convention: https://docs.python.org/3/c-api/apiabiversion.html
// Additional convention: 0xD = dev
#define PYBIND11_VERSION_HEX 0x020D00D1
// Define some generic pybind11 helper macros for warning management.
//
// Note that compiler-specific push/pop pairs are baked into the
// PYBIND11_NAMESPACE_BEGIN/PYBIND11_NAMESPACE_END pair of macros. Therefore manual
// PYBIND11_WARNING_PUSH/PYBIND11_WARNING_POP are usually only needed in `#include` sections.
//
// If you find you need to suppress a warning, please try to make the suppression as local as
// possible using these macros. Please also be sure to push/pop with the pybind11 macros. Please
// only use compiler specifics if you need to check specific versions, e.g. Apple Clang vs. vanilla
// Clang.
#if defined(_MSC_VER)
# define PYBIND11_COMPILER_MSVC
# define PYBIND11_PRAGMA(...) __pragma(__VA_ARGS__)
# define PYBIND11_WARNING_PUSH PYBIND11_PRAGMA(warning(push))
# define PYBIND11_WARNING_POP PYBIND11_PRAGMA(warning(pop))
#elif defined(__INTEL_COMPILER)
# define PYBIND11_COMPILER_INTEL
# define PYBIND11_PRAGMA(...) _Pragma(#__VA_ARGS__)
# define PYBIND11_WARNING_PUSH PYBIND11_PRAGMA(warning push)
# define PYBIND11_WARNING_POP PYBIND11_PRAGMA(warning pop)
#elif defined(__clang__)
# define PYBIND11_COMPILER_CLANG
# define PYBIND11_PRAGMA(...) _Pragma(#__VA_ARGS__)
# define PYBIND11_WARNING_PUSH PYBIND11_PRAGMA(clang diagnostic push)
# define PYBIND11_WARNING_POP PYBIND11_PRAGMA(clang diagnostic push)
#elif defined(__GNUC__)
# define PYBIND11_COMPILER_GCC
# define PYBIND11_PRAGMA(...) _Pragma(#__VA_ARGS__)
# define PYBIND11_WARNING_PUSH PYBIND11_PRAGMA(GCC diagnostic push)
# define PYBIND11_WARNING_POP PYBIND11_PRAGMA(GCC diagnostic pop)
#endif
#ifdef PYBIND11_COMPILER_MSVC
# define PYBIND11_WARNING_DISABLE_MSVC(name) PYBIND11_PRAGMA(warning(disable : name))
#else
# define PYBIND11_WARNING_DISABLE_MSVC(name)
#endif
#ifdef PYBIND11_COMPILER_CLANG
# define PYBIND11_WARNING_DISABLE_CLANG(name) PYBIND11_PRAGMA(clang diagnostic ignored name)
#else
# define PYBIND11_WARNING_DISABLE_CLANG(name)
#endif
#ifdef PYBIND11_COMPILER_GCC
# define PYBIND11_WARNING_DISABLE_GCC(name) PYBIND11_PRAGMA(GCC diagnostic ignored name)
#else
# define PYBIND11_WARNING_DISABLE_GCC(name)
#endif
#ifdef PYBIND11_COMPILER_INTEL
# define PYBIND11_WARNING_DISABLE_INTEL(name) PYBIND11_PRAGMA(warning disable name)
#else
# define PYBIND11_WARNING_DISABLE_INTEL(name)
#endif
#define PYBIND11_NAMESPACE_BEGIN(name) \
namespace name { \
PYBIND11_WARNING_PUSH
#define PYBIND11_NAMESPACE_END(name) \
PYBIND11_WARNING_POP \
}
// Robust support for some features and loading modules compiled against different pybind versions
// requires forcing hidden visibility on pybind code, so we enforce this by setting the attribute
// on the main `pybind11` namespace.
#if !defined(PYBIND11_NAMESPACE)
# ifdef __GNUG__
# define PYBIND11_NAMESPACE pybind11 __attribute__((visibility("hidden")))
# else
# define PYBIND11_NAMESPACE pybind11
# endif
#endif
#if !(defined(_MSC_VER) && __cplusplus == 199711L)
# if __cplusplus >= 201402L
# define PYBIND11_CPP14
# if __cplusplus >= 201703L
# define PYBIND11_CPP17
# if __cplusplus >= 202002L
# define PYBIND11_CPP20
// Please update tests/pybind11_tests.cpp `cpp_std()` when adding a macro here.
# endif
# endif
# endif
#elif defined(_MSC_VER) && __cplusplus == 199711L
// MSVC sets _MSVC_LANG rather than __cplusplus (supposedly until the standard is fully
// implemented). Unless you use the /Zc:__cplusplus flag on Visual Studio 2017 15.7 Preview 3
// or newer.
# if _MSVC_LANG >= 201402L
# define PYBIND11_CPP14
# if _MSVC_LANG > 201402L
# define PYBIND11_CPP17
# if _MSVC_LANG >= 202002L
# define PYBIND11_CPP20
# endif
# endif
# endif
#endif
#if defined(PYBIND11_CPP20)
# define PYBIND11_CONSTINIT constinit
# define PYBIND11_DTOR_CONSTEXPR constexpr
#else
# define PYBIND11_CONSTINIT
# define PYBIND11_DTOR_CONSTEXPR
#endif
// Compiler version assertions
#if defined(__INTEL_COMPILER)
# if __INTEL_COMPILER < 1800
# error pybind11 requires Intel C++ compiler v18 or newer
# elif __INTEL_COMPILER < 1900 && defined(PYBIND11_CPP14)
# error pybind11 supports only C++11 with Intel C++ compiler v18. Use v19 or newer for C++14.
# endif
/* The following pragma cannot be pop'ed:
https://community.intel.com/t5/Intel-C-Compiler/Inline-and-no-inline-warning/td-p/1216764 */
# pragma warning disable 2196 // warning #2196: routine is both "inline" and "noinline"
#elif defined(__clang__) && !defined(__apple_build_version__)
# if __clang_major__ < 3 || (__clang_major__ == 3 && __clang_minor__ < 3)
# error pybind11 requires clang 3.3 or newer
# endif
#elif defined(__clang__)
// Apple changes clang version macros to its Xcode version; the first Xcode release based on
// (upstream) clang 3.3 was Xcode 5:
# if __clang_major__ < 5
# error pybind11 requires Xcode/clang 5.0 or newer
# endif
#elif defined(__GNUG__)
# if __GNUC__ < 4 || (__GNUC__ == 4 && __GNUC_MINOR__ < 8)
# error pybind11 requires gcc 4.8 or newer
# endif
#elif defined(_MSC_VER)
# if _MSC_VER < 1910
# error pybind11 2.10+ requires MSVC 2017 or newer
# endif
#endif
#if !defined(PYBIND11_EXPORT)
# if defined(WIN32) || defined(_WIN32)
# define PYBIND11_EXPORT __declspec(dllexport)
# else
# define PYBIND11_EXPORT __attribute__((visibility("default")))
# endif
#endif
#if !defined(PYBIND11_EXPORT_EXCEPTION)
# if defined(__apple_build_version__)
# define PYBIND11_EXPORT_EXCEPTION PYBIND11_EXPORT
# else
# define PYBIND11_EXPORT_EXCEPTION
# endif
#endif
// For CUDA, GCC7, GCC8:
// PYBIND11_NOINLINE_FORCED is incompatible with `-Wattributes -Werror`.
// When defining PYBIND11_NOINLINE_FORCED, it is best to also use `-Wno-attributes`.
// However, the measured shared-library size saving when using noinline are only
// 1.7% for CUDA, -0.2% for GCC7, and 0.0% for GCC8 (using -DCMAKE_BUILD_TYPE=MinSizeRel,
// the default under pybind11/tests).
#if !defined(PYBIND11_NOINLINE_FORCED) \
&& (defined(__CUDACC__) || (defined(__GNUC__) && (__GNUC__ == 7 || __GNUC__ == 8)))
# define PYBIND11_NOINLINE_DISABLED
#endif
// The PYBIND11_NOINLINE macro is for function DEFINITIONS.
// In contrast, FORWARD DECLARATIONS should never use this macro:
// https://stackoverflow.com/questions/9317473/forward-declaration-of-inline-functions
#if defined(PYBIND11_NOINLINE_DISABLED) // Option for maximum portability and experimentation.
# define PYBIND11_NOINLINE inline
#elif defined(_MSC_VER)
# define PYBIND11_NOINLINE __declspec(noinline) inline
#else
# define PYBIND11_NOINLINE __attribute__((noinline)) inline
#endif
#if defined(__MINGW32__)
// For unknown reasons all PYBIND11_DEPRECATED member trigger a warning when declared
// whether it is used or not
# define PYBIND11_DEPRECATED(reason)
#elif defined(PYBIND11_CPP14)
# define PYBIND11_DEPRECATED(reason) [[deprecated(reason)]]
#else
# define PYBIND11_DEPRECATED(reason) __attribute__((deprecated(reason)))
#endif
#if defined(PYBIND11_CPP17)
# define PYBIND11_MAYBE_UNUSED [[maybe_unused]]
#elif defined(_MSC_VER) && !defined(__clang__)
# define PYBIND11_MAYBE_UNUSED
#else
# define PYBIND11_MAYBE_UNUSED __attribute__((__unused__))
#endif
/* Don't let Python.h #define (v)snprintf as macro because they are implemented
properly in Visual Studio since 2015. */
#if defined(_MSC_VER)
# define HAVE_SNPRINTF 1
#endif
/// Include Python header, disable linking to pythonX_d.lib on Windows in debug mode
#if defined(_MSC_VER)
PYBIND11_WARNING_PUSH
PYBIND11_WARNING_DISABLE_MSVC(4505)
// C4505: 'PySlice_GetIndicesEx': unreferenced local function has been removed (PyPy only)
# if defined(_DEBUG) && !defined(Py_DEBUG)
// Workaround for a VS 2022 issue.
// NOTE: This workaround knowingly violates the Python.h include order requirement:
// https://docs.python.org/3/c-api/intro.html#include-files
// See https://github.com/pybind/pybind11/pull/3497 for full context.
# include <yvals.h>
# if _MSVC_STL_VERSION >= 143
# include <crtdefs.h>
# endif
# define PYBIND11_DEBUG_MARKER
# undef _DEBUG
# endif
#endif
// https://en.cppreference.com/w/c/chrono/localtime
#if defined(__STDC_LIB_EXT1__) && !defined(__STDC_WANT_LIB_EXT1__)
# define __STDC_WANT_LIB_EXT1__
#endif
#ifdef __has_include
// std::optional (but including it in c++14 mode isn't allowed)
# if defined(PYBIND11_CPP17) && __has_include(<optional>)
# define PYBIND11_HAS_OPTIONAL 1
# endif
// std::experimental::optional (but not allowed in c++11 mode)
# if defined(PYBIND11_CPP14) && (__has_include(<experimental/optional>) && \
!__has_include(<optional>))
# define PYBIND11_HAS_EXP_OPTIONAL 1
# endif
// std::variant
# if defined(PYBIND11_CPP17) && __has_include(<variant>)
# define PYBIND11_HAS_VARIANT 1
# endif
#elif defined(_MSC_VER) && defined(PYBIND11_CPP17)
# define PYBIND11_HAS_OPTIONAL 1
# define PYBIND11_HAS_VARIANT 1
#endif
#if defined(PYBIND11_CPP17)
# if defined(__has_include)
# if __has_include(<string_view>)
# define PYBIND11_HAS_STRING_VIEW
# endif
# elif defined(_MSC_VER)
# define PYBIND11_HAS_STRING_VIEW
# endif
#endif
#include <Python.h>
// Reminder: WITH_THREAD is always defined if PY_VERSION_HEX >= 0x03070000
#if PY_VERSION_HEX < 0x03060000
# error "PYTHON < 3.6 IS UNSUPPORTED. pybind11 v2.9 was the last to support Python 2 and 3.5."
#endif
#include <frameobject.h>
#include <pythread.h>
/* Python #defines overrides on all sorts of core functions, which
tends to weak havok in C++ codebases that expect these to work
like regular functions (potentially with several overloads) */
#if defined(isalnum)
# undef isalnum
# undef isalpha
# undef islower
# undef isspace
# undef isupper
# undef tolower
# undef toupper
#endif
#if defined(copysign)
# undef copysign
#endif
#if defined(PYBIND11_NUMPY_1_ONLY)
# define PYBIND11_INTERNAL_NUMPY_1_ONLY_DETECTED
#endif
#if defined(PYPY_VERSION) && !defined(PYBIND11_SIMPLE_GIL_MANAGEMENT)
# define PYBIND11_SIMPLE_GIL_MANAGEMENT
#endif
#if defined(_MSC_VER)
# if defined(PYBIND11_DEBUG_MARKER)
# define _DEBUG
# undef PYBIND11_DEBUG_MARKER
# endif
PYBIND11_WARNING_POP
#endif
#include <cstddef>
#include <cstring>
#include <exception>
#include <forward_list>
#include <memory>
#include <stdexcept>
#include <string>
#include <type_traits>
#include <typeindex>
#include <unordered_map>
#include <unordered_set>
#include <vector>
#if defined(__has_include)
# if __has_include(<version>)
# include <version>
# endif
#endif
// Must be after including <version> or one of the other headers specified by the standard
#if defined(__cpp_lib_char8_t) && __cpp_lib_char8_t >= 201811L
# define PYBIND11_HAS_U8STRING
#endif
// See description of PR #4246:
#if !defined(PYBIND11_NO_ASSERT_GIL_HELD_INCREF_DECREF) && !defined(NDEBUG) \
&& !defined(PYPY_VERSION) && !defined(PYBIND11_ASSERT_GIL_HELD_INCREF_DECREF)
# define PYBIND11_ASSERT_GIL_HELD_INCREF_DECREF
#endif
// #define PYBIND11_STR_LEGACY_PERMISSIVE
// If DEFINED, pybind11::str can hold PyUnicodeObject or PyBytesObject
// (probably surprising and never documented, but this was the
// legacy behavior until and including v2.6.x). As a side-effect,
// pybind11::isinstance<str>() is true for both pybind11::str and
// pybind11::bytes.
// If UNDEFINED, pybind11::str can only hold PyUnicodeObject, and
// pybind11::isinstance<str>() is true only for pybind11::str.
// However, for Python 2 only (!), the pybind11::str caster
// implicitly decoded bytes to PyUnicodeObject. This was to ease
// the transition from the legacy behavior to the non-permissive
// behavior.
/// Compatibility macros for Python 2 / Python 3 versions TODO: remove
#define PYBIND11_INSTANCE_METHOD_NEW(ptr, class_) PyInstanceMethod_New(ptr)
#define PYBIND11_INSTANCE_METHOD_CHECK PyInstanceMethod_Check
#define PYBIND11_INSTANCE_METHOD_GET_FUNCTION PyInstanceMethod_GET_FUNCTION
#define PYBIND11_BYTES_CHECK PyBytes_Check
#define PYBIND11_BYTES_FROM_STRING PyBytes_FromString
#define PYBIND11_BYTES_FROM_STRING_AND_SIZE PyBytes_FromStringAndSize
#define PYBIND11_BYTES_AS_STRING_AND_SIZE PyBytes_AsStringAndSize
#define PYBIND11_BYTES_AS_STRING PyBytes_AsString
#define PYBIND11_BYTES_SIZE PyBytes_Size
#define PYBIND11_LONG_CHECK(o) PyLong_Check(o)
#define PYBIND11_LONG_AS_LONGLONG(o) PyLong_AsLongLong(o)
#define PYBIND11_LONG_FROM_SIGNED(o) PyLong_FromSsize_t((ssize_t) (o))
#define PYBIND11_LONG_FROM_UNSIGNED(o) PyLong_FromSize_t((size_t) (o))
#define PYBIND11_BYTES_NAME "bytes"
#define PYBIND11_STRING_NAME "str"
#define PYBIND11_SLICE_OBJECT PyObject
#define PYBIND11_FROM_STRING PyUnicode_FromString
#define PYBIND11_STR_TYPE ::pybind11::str
#define PYBIND11_BOOL_ATTR "__bool__"
#define PYBIND11_NB_BOOL(ptr) ((ptr)->nb_bool)
#define PYBIND11_BUILTINS_MODULE "builtins"
// Providing a separate declaration to make Clang's -Wmissing-prototypes happy.
// See comment for PYBIND11_MODULE below for why this is marked "maybe unused".
#define PYBIND11_PLUGIN_IMPL(name) \
extern "C" PYBIND11_MAYBE_UNUSED PYBIND11_EXPORT PyObject *PyInit_##name(); \
extern "C" PYBIND11_EXPORT PyObject *PyInit_##name()
#define PYBIND11_TRY_NEXT_OVERLOAD ((PyObject *) 1) // special failure return code
#define PYBIND11_STRINGIFY(x) #x
#define PYBIND11_TOSTRING(x) PYBIND11_STRINGIFY(x)
#define PYBIND11_CONCAT(first, second) first##second
#define PYBIND11_ENSURE_INTERNALS_READY pybind11::detail::get_internals();
#define PYBIND11_CHECK_PYTHON_VERSION \
{ \
const char *compiled_ver \
= PYBIND11_TOSTRING(PY_MAJOR_VERSION) "." PYBIND11_TOSTRING(PY_MINOR_VERSION); \
const char *runtime_ver = Py_GetVersion(); \
size_t len = std::strlen(compiled_ver); \
if (std::strncmp(runtime_ver, compiled_ver, len) != 0 \
|| (runtime_ver[len] >= '0' && runtime_ver[len] <= '9')) { \
PyErr_Format(PyExc_ImportError, \
"Python version mismatch: module was compiled for Python %s, " \
"but the interpreter version is incompatible: %s.", \
compiled_ver, \
runtime_ver); \
return nullptr; \
} \
}
#define PYBIND11_CATCH_INIT_EXCEPTIONS \
catch (pybind11::error_already_set & e) { \
pybind11::raise_from(e, PyExc_ImportError, "initialization failed"); \
return nullptr; \
} \
catch (const std::exception &e) { \
::pybind11::set_error(PyExc_ImportError, e.what()); \
return nullptr; \
}
/** \rst
***Deprecated in favor of PYBIND11_MODULE***
This macro creates the entry point that will be invoked when the Python interpreter
imports a plugin library. Please create a `module_` in the function body and return
the pointer to its underlying Python object at the end.
.. code-block:: cpp
PYBIND11_PLUGIN(example) {
pybind11::module_ m("example", "pybind11 example plugin");
/// Set up bindings here
return m.ptr();
}
\endrst */
#define PYBIND11_PLUGIN(name) \
PYBIND11_DEPRECATED("PYBIND11_PLUGIN is deprecated, use PYBIND11_MODULE") \
static PyObject *pybind11_init(); \
PYBIND11_PLUGIN_IMPL(name) { \
PYBIND11_CHECK_PYTHON_VERSION \
PYBIND11_ENSURE_INTERNALS_READY \
try { \
return pybind11_init(); \
} \
PYBIND11_CATCH_INIT_EXCEPTIONS \
} \
PyObject *pybind11_init()
/** \rst
This macro creates the entry point that will be invoked when the Python interpreter
imports an extension module. The module name is given as the first argument and it
should not be in quotes. The second macro argument defines a variable of type
`py::module_` which can be used to initialize the module.
The entry point is marked as "maybe unused" to aid dead-code detection analysis:
since the entry point is typically only looked up at runtime and not referenced
during translation, it would otherwise appear as unused ("dead") code.
.. code-block:: cpp
PYBIND11_MODULE(example, m) {
m.doc() = "pybind11 example module";
// Add bindings here
m.def("foo", []() {
return "Hello, World!";
});
}
\endrst */
#define PYBIND11_MODULE(name, variable) \
static ::pybind11::module_::module_def PYBIND11_CONCAT(pybind11_module_def_, name) \
PYBIND11_MAYBE_UNUSED; \
PYBIND11_MAYBE_UNUSED \
static void PYBIND11_CONCAT(pybind11_init_, name)(::pybind11::module_ &); \
PYBIND11_PLUGIN_IMPL(name) { \
PYBIND11_CHECK_PYTHON_VERSION \
PYBIND11_ENSURE_INTERNALS_READY \
auto m = ::pybind11::module_::create_extension_module( \
PYBIND11_TOSTRING(name), nullptr, &PYBIND11_CONCAT(pybind11_module_def_, name)); \
try { \
PYBIND11_CONCAT(pybind11_init_, name)(m); \
return m.ptr(); \
} \
PYBIND11_CATCH_INIT_EXCEPTIONS \
} \
void PYBIND11_CONCAT(pybind11_init_, name)(::pybind11::module_ & (variable))
PYBIND11_NAMESPACE_BEGIN(PYBIND11_NAMESPACE)
using ssize_t = Py_ssize_t;
using size_t = std::size_t;
template <typename IntType>
inline ssize_t ssize_t_cast(const IntType &val) {
static_assert(sizeof(IntType) <= sizeof(ssize_t), "Implicit narrowing is not permitted.");
return static_cast<ssize_t>(val);
}
/// Approach used to cast a previously unknown C++ instance into a Python object
enum class return_value_policy : uint8_t {
/** This is the default return value policy, which falls back to the policy
return_value_policy::take_ownership when the return value is a pointer.
Otherwise, it uses return_value::move or return_value::copy for rvalue
and lvalue references, respectively. See below for a description of what
all of these different policies do. */
automatic = 0,
/** As above, but use policy return_value_policy::reference when the return
value is a pointer. This is the default conversion policy for function
arguments when calling Python functions manually from C++ code (i.e. via
handle::operator()). You probably won't need to use this. */
automatic_reference,
/** Reference an existing object (i.e. do not create a new copy) and take
ownership. Python will call the destructor and delete operator when the
object's reference count reaches zero. Undefined behavior ensues when
the C++ side does the same.. */
take_ownership,
/** Create a new copy of the returned object, which will be owned by
Python. This policy is comparably safe because the lifetimes of the two
instances are decoupled. */
copy,
/** Use std::move to move the return value contents into a new instance
that will be owned by Python. This policy is comparably safe because the
lifetimes of the two instances (move source and destination) are
decoupled. */
move,
/** Reference an existing object, but do not take ownership. The C++ side
is responsible for managing the object's lifetime and deallocating it
when it is no longer used. Warning: undefined behavior will ensue when
the C++ side deletes an object that is still referenced and used by
Python. */
reference,
/** This policy only applies to methods and properties. It references the
object without taking ownership similar to the above
return_value_policy::reference policy. In contrast to that policy, the
function or property's implicit this argument (called the parent) is
considered to be the the owner of the return value (the child).
pybind11 then couples the lifetime of the parent to the child via a
reference relationship that ensures that the parent cannot be garbage
collected while Python is still using the child. More advanced
variations of this scheme are also possible using combinations of
return_value_policy::reference and the keep_alive call policy */
reference_internal
};
PYBIND11_NAMESPACE_BEGIN(detail)
inline static constexpr int log2(size_t n, int k = 0) {
return (n <= 1) ? k : log2(n >> 1, k + 1);
}
// Returns the size as a multiple of sizeof(void *), rounded up.
inline static constexpr size_t size_in_ptrs(size_t s) {
return 1 + ((s - 1) >> log2(sizeof(void *)));
}
/**
* The space to allocate for simple layout instance holders (see below) in multiple of the size of
* a pointer (e.g. 2 means 16 bytes on 64-bit architectures). The default is the minimum required
* to holder either a std::unique_ptr or std::shared_ptr (which is almost always
* sizeof(std::shared_ptr<T>)).
*/
constexpr size_t instance_simple_holder_in_ptrs() {
static_assert(sizeof(std::shared_ptr<int>) >= sizeof(std::unique_ptr<int>),
"pybind assumes std::shared_ptrs are at least as big as std::unique_ptrs");
return size_in_ptrs(sizeof(std::shared_ptr<int>));
}
// Forward declarations
struct type_info;
struct value_and_holder;
struct nonsimple_values_and_holders {
void **values_and_holders;
uint8_t *status;
};
/// The 'instance' type which needs to be standard layout (need to be able to use 'offsetof')
struct instance {
PyObject_HEAD
/// Storage for pointers and holder; see simple_layout, below, for a description
union {
void *simple_value_holder[1 + instance_simple_holder_in_ptrs()];
nonsimple_values_and_holders nonsimple;
};
/// Weak references
PyObject *weakrefs;
/// If true, the pointer is owned which means we're free to manage it with a holder.
bool owned : 1;
/**
* An instance has two possible value/holder layouts.
*
* Simple layout (when this flag is true), means the `simple_value_holder` is set with a
* pointer and the holder object governing that pointer, i.e. [val1*][holder]. This layout is
* applied whenever there is no python-side multiple inheritance of bound C++ types *and* the
* type's holder will fit in the default space (which is large enough to hold either a
* std::unique_ptr or std::shared_ptr).
*
* Non-simple layout applies when using custom holders that require more space than
* `shared_ptr` (which is typically the size of two pointers), or when multiple inheritance is
* used on the python side. Non-simple layout allocates the required amount of memory to have
* multiple bound C++ classes as parents. Under this layout, `nonsimple.values_and_holders` is
* set to a pointer to allocated space of the required space to hold a sequence of value
* pointers and holders followed `status`, a set of bit flags (1 byte each), i.e.
* [val1*][holder1][val2*][holder2]...[bb...] where each [block] is rounded up to a multiple
* of `sizeof(void *)`. `nonsimple.status` is, for convenience, a pointer to the beginning of
* the [bb...] block (but not independently allocated).
*
* Status bits indicate whether the associated holder is constructed (&
* status_holder_constructed) and whether the value pointer is registered (&
* status_instance_registered) in `registered_instances`.
*/
bool simple_layout : 1;
/// For simple layout, tracks whether the holder has been constructed
bool simple_holder_constructed : 1;
/// For simple layout, tracks whether the instance is registered in `registered_instances`
bool simple_instance_registered : 1;
/// If true, get_internals().patients has an entry for this object
bool has_patients : 1;
/// Initializes all of the above type/values/holders data (but not the instance values
/// themselves)
void allocate_layout();
/// Destroys/deallocates all of the above
void deallocate_layout();
/// Returns the value_and_holder wrapper for the given type (or the first, if `find_type`
/// omitted). Returns a default-constructed (with `.inst = nullptr`) object on failure if
/// `throw_if_missing` is false.
value_and_holder get_value_and_holder(const type_info *find_type = nullptr,
bool throw_if_missing = true);
/// Bit values for the non-simple status flags
static constexpr uint8_t status_holder_constructed = 1;
static constexpr uint8_t status_instance_registered = 2;
};
static_assert(std::is_standard_layout<instance>::value,
"Internal error: `pybind11::detail::instance` is not standard layout!");
/// from __cpp_future__ import (convenient aliases from C++14/17)
#if defined(PYBIND11_CPP14)
using std::conditional_t;
using std::enable_if_t;
using std::remove_cv_t;
using std::remove_reference_t;
#else
template <bool B, typename T = void>
using enable_if_t = typename std::enable_if<B, T>::type;
template <bool B, typename T, typename F>
using conditional_t = typename std::conditional<B, T, F>::type;
template <typename T>
using remove_cv_t = typename std::remove_cv<T>::type;
template <typename T>
using remove_reference_t = typename std::remove_reference<T>::type;
#endif
#if defined(PYBIND11_CPP20)
using std::remove_cvref;
using std::remove_cvref_t;
#else
template <class T>
struct remove_cvref {
using type = remove_cv_t<remove_reference_t<T>>;
};
template <class T>
using remove_cvref_t = typename remove_cvref<T>::type;
#endif
/// Example usage: is_same_ignoring_cvref<T, PyObject *>::value
template <typename T, typename U>
using is_same_ignoring_cvref = std::is_same<detail::remove_cvref_t<T>, U>;
/// Index sequences
#if defined(PYBIND11_CPP14)
using std::index_sequence;
using std::make_index_sequence;
#else
template <size_t...>
struct index_sequence {};
template <size_t N, size_t... S>
struct make_index_sequence_impl : make_index_sequence_impl<N - 1, N - 1, S...> {};
template <size_t... S>
struct make_index_sequence_impl<0, S...> {
using type = index_sequence<S...>;
};
template <size_t N>
using make_index_sequence = typename make_index_sequence_impl<N>::type;
#endif
/// Make an index sequence of the indices of true arguments
template <typename ISeq, size_t, bool...>
struct select_indices_impl {
using type = ISeq;
};
template <size_t... IPrev, size_t I, bool B, bool... Bs>
struct select_indices_impl<index_sequence<IPrev...>, I, B, Bs...>
: select_indices_impl<conditional_t<B, index_sequence<IPrev..., I>, index_sequence<IPrev...>>,
I + 1,
Bs...> {};
template <bool... Bs>
using select_indices = typename select_indices_impl<index_sequence<>, 0, Bs...>::type;
/// Backports of std::bool_constant and std::negation to accommodate older compilers
template <bool B>
using bool_constant = std::integral_constant<bool, B>;
template <typename T>
struct negation : bool_constant<!T::value> {};
// PGI/Intel cannot detect operator delete with the "compatible" void_t impl, so
// using the new one (C++14 defect, so generally works on newer compilers, even
// if not in C++17 mode)
#if defined(__PGIC__) || defined(__INTEL_COMPILER)
template <typename...>
using void_t = void;
#else
template <typename...>
struct void_t_impl {
using type = void;
};
template <typename... Ts>
using void_t = typename void_t_impl<Ts...>::type;
#endif
/// Compile-time all/any/none of that check the boolean value of all template types
#if defined(__cpp_fold_expressions) && !(defined(_MSC_VER) && (_MSC_VER < 1916))
template <class... Ts>
using all_of = bool_constant<(Ts::value && ...)>;
template <class... Ts>
using any_of = bool_constant<(Ts::value || ...)>;
#elif !defined(_MSC_VER)
template <bool...>
struct bools {};
template <class... Ts>
using all_of = std::is_same<bools<Ts::value..., true>, bools<true, Ts::value...>>;
template <class... Ts>
using any_of = negation<all_of<negation<Ts>...>>;
#else
// MSVC has trouble with the above, but supports std::conjunction, which we can use instead (albeit
// at a slight loss of compilation efficiency).
template <class... Ts>
using all_of = std::conjunction<Ts...>;
template <class... Ts>
using any_of = std::disjunction<Ts...>;
#endif
template <class... Ts>
using none_of = negation<any_of<Ts...>>;
template <class T, template <class> class... Predicates>
using satisfies_all_of = all_of<Predicates<T>...>;
template <class T, template <class> class... Predicates>
using satisfies_any_of = any_of<Predicates<T>...>;
template <class T, template <class> class... Predicates>
using satisfies_none_of = none_of<Predicates<T>...>;
/// Strip the class from a method type
template <typename T>
struct remove_class {};
template <typename C, typename R, typename... A>
struct remove_class<R (C::*)(A...)> {
using type = R(A...);
};
template <typename C, typename R, typename... A>
struct remove_class<R (C::*)(A...) const> {
using type = R(A...);
};
#ifdef __cpp_noexcept_function_type
template <typename C, typename R, typename... A>
struct remove_class<R (C::*)(A...) noexcept> {
using type = R(A...);
};
template <typename C, typename R, typename... A>
struct remove_class<R (C::*)(A...) const noexcept> {
using type = R(A...);
};
#endif
/// Helper template to strip away type modifiers
template <typename T>
struct intrinsic_type {
using type = T;
};
template <typename T>
struct intrinsic_type<const T> {
using type = typename intrinsic_type<T>::type;
};
template <typename T>
struct intrinsic_type<T *> {
using type = typename intrinsic_type<T>::type;
};
template <typename T>
struct intrinsic_type<T &> {
using type = typename intrinsic_type<T>::type;
};
template <typename T>
struct intrinsic_type<T &&> {
using type = typename intrinsic_type<T>::type;
};
template <typename T, size_t N>
struct intrinsic_type<const T[N]> {
using type = typename intrinsic_type<T>::type;
};
template <typename T, size_t N>
struct intrinsic_type<T[N]> {
using type = typename intrinsic_type<T>::type;
};
template <typename T>
using intrinsic_t = typename intrinsic_type<T>::type;
/// Helper type to replace 'void' in some expressions
struct void_type {};
/// Helper template which holds a list of types
template <typename...>
struct type_list {};
/// Compile-time integer sum
#ifdef __cpp_fold_expressions
template <typename... Ts>
constexpr size_t constexpr_sum(Ts... ns) {
return (0 + ... + size_t{ns});
}
#else
constexpr size_t constexpr_sum() { return 0; }
template <typename T, typename... Ts>
constexpr size_t constexpr_sum(T n, Ts... ns) {
return size_t{n} + constexpr_sum(ns...);
}
#endif
PYBIND11_NAMESPACE_BEGIN(constexpr_impl)
/// Implementation details for constexpr functions
constexpr int first(int i) { return i; }
template <typename T, typename... Ts>
constexpr int first(int i, T v, Ts... vs) {
return v ? i : first(i + 1, vs...);
}
constexpr int last(int /*i*/, int result) { return result; }
template <typename T, typename... Ts>
constexpr int last(int i, int result, T v, Ts... vs) {
return last(i + 1, v ? i : result, vs...);
}
PYBIND11_NAMESPACE_END(constexpr_impl)
/// Return the index of the first type in Ts which satisfies Predicate<T>.
/// Returns sizeof...(Ts) if none match.
template <template <typename> class Predicate, typename... Ts>
constexpr int constexpr_first() {
return constexpr_impl::first(0, Predicate<Ts>::value...);
}
/// Return the index of the last type in Ts which satisfies Predicate<T>, or -1 if none match.
template <template <typename> class Predicate, typename... Ts>
constexpr int constexpr_last() {
return constexpr_impl::last(0, -1, Predicate<Ts>::value...);
}
/// Return the Nth element from the parameter pack
template <size_t N, typename T, typename... Ts>
struct pack_element {
using type = typename pack_element<N - 1, Ts...>::type;
};
template <typename T, typename... Ts>
struct pack_element<0, T, Ts...> {
using type = T;
};
/// Return the one and only type which matches the predicate, or Default if none match.
/// If more than one type matches the predicate, fail at compile-time.
template <template <typename> class Predicate, typename Default, typename... Ts>
struct exactly_one {
static constexpr auto found = constexpr_sum(Predicate<Ts>::value...);
static_assert(found <= 1, "Found more than one type matching the predicate");
static constexpr auto index = found ? constexpr_first<Predicate, Ts...>() : 0;
using type = conditional_t<found, typename pack_element<index, Ts...>::type, Default>;
};
template <template <typename> class P, typename Default>
struct exactly_one<P, Default> {
using type = Default;
};
template <template <typename> class Predicate, typename Default, typename... Ts>
using exactly_one_t = typename exactly_one<Predicate, Default, Ts...>::type;
/// Defer the evaluation of type T until types Us are instantiated
template <typename T, typename... /*Us*/>
struct deferred_type {
using type = T;
};
template <typename T, typename... Us>
using deferred_t = typename deferred_type<T, Us...>::type;
/// Like is_base_of, but requires a strict base (i.e. `is_strict_base_of<T, T>::value == false`,
/// unlike `std::is_base_of`)
template <typename Base, typename Derived>
using is_strict_base_of
= bool_constant<std::is_base_of<Base, Derived>::value && !std::is_same<Base, Derived>::value>;
/// Like is_base_of, but also requires that the base type is accessible (i.e. that a Derived
/// pointer can be converted to a Base pointer) For unions, `is_base_of<T, T>::value` is False, so
/// we need to check `is_same` as well.
template <typename Base, typename Derived>
using is_accessible_base_of
= bool_constant<(std::is_same<Base, Derived>::value || std::is_base_of<Base, Derived>::value)
&& std::is_convertible<Derived *, Base *>::value>;
template <template <typename...> class Base>
struct is_template_base_of_impl {
template <typename... Us>
static std::true_type check(Base<Us...> *);
static std::false_type check(...);
};
/// Check if a template is the base of a type. For example:
/// `is_template_base_of<Base, T>` is true if `struct T : Base<U> {}` where U can be anything
template <template <typename...> class Base, typename T>
// Sadly, all MSVC versions incl. 2022 need the workaround, even in C++20 mode.
// See also: https://github.com/pybind/pybind11/pull/3741
#if !defined(_MSC_VER)
using is_template_base_of
= decltype(is_template_base_of_impl<Base>::check((intrinsic_t<T> *) nullptr));
#else
struct is_template_base_of
: decltype(is_template_base_of_impl<Base>::check((intrinsic_t<T> *) nullptr)){};
#endif
/// Check if T is an instantiation of the template `Class`. For example:
/// `is_instantiation<shared_ptr, T>` is true if `T == shared_ptr<U>` where U can be anything.
template <template <typename...> class Class, typename T>
struct is_instantiation : std::false_type {};
template <template <typename...> class Class, typename... Us>
struct is_instantiation<Class, Class<Us...>> : std::true_type {};
/// Check if T is std::shared_ptr<U> where U can be anything
template <typename T>
using is_shared_ptr = is_instantiation<std::shared_ptr, T>;
/// Check if T looks like an input iterator
template <typename T, typename = void>
struct is_input_iterator : std::false_type {};
template <typename T>
struct is_input_iterator<T,
void_t<decltype(*std::declval<T &>()), decltype(++std::declval<T &>())>>
: std::true_type {};
template <typename T>
using is_function_pointer
= bool_constant<std::is_pointer<T>::value
&& std::is_function<typename std::remove_pointer<T>::type>::value>;
template <typename F>
struct strip_function_object {
// If you are encountering an
// 'error: name followed by "::" must be a class or namespace name'
// with the Intel compiler and a noexcept function here,
// try to use noexcept(true) instead of plain noexcept.
using type = typename remove_class<decltype(&F::operator())>::type;
};
// Extracts the function signature from a function, function pointer or lambda.
template <typename Function, typename F = remove_reference_t<Function>>
using function_signature_t = conditional_t<
std::is_function<F>::value,
F,
typename conditional_t<std::is_pointer<F>::value || std::is_member_pointer<F>::value,
std::remove_pointer<F>,
strip_function_object<F>>::type>;
/// Returns true if the type looks like a lambda: that is, isn't a function, pointer or member
/// pointer. Note that this can catch all sorts of other things, too; this is intended to be used
/// in a place where passing a lambda makes sense.
template <typename T>
using is_lambda = satisfies_none_of<remove_reference_t<T>,
std::is_function,
std::is_pointer,
std::is_member_pointer>;
// [workaround(intel)] Internal error on fold expression
/// Apply a function over each element of a parameter pack
#if defined(__cpp_fold_expressions) && !defined(__INTEL_COMPILER)
// Intel compiler produces an internal error on this fold expression (tested with ICC 19.0.2)
# define PYBIND11_EXPAND_SIDE_EFFECTS(PATTERN) (((PATTERN), void()), ...)
#else
using expand_side_effects = bool[];
# define PYBIND11_EXPAND_SIDE_EFFECTS(PATTERN) \
(void) pybind11::detail::expand_side_effects { ((PATTERN), void(), false)..., false }
#endif
PYBIND11_NAMESPACE_END(detail)
/// C++ bindings of builtin Python exceptions
class PYBIND11_EXPORT_EXCEPTION builtin_exception : public std::runtime_error {
public:
using std::runtime_error::runtime_error;
/// Set the error using the Python C API
virtual void set_error() const = 0;