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
use std::num::NonZeroI32;

use crate::support::int;
use crate::support::Maybe;
use crate::BigInt;
use crate::Boolean;
use crate::Context;
use crate::HandleScope;
use crate::Int32;
use crate::Integer;
use crate::Isolate;
use crate::Local;
use crate::Number;
use crate::Object;
use crate::String;
use crate::Uint32;
use crate::Value;

extern "C" {
  fn v8__Value__IsUndefined(this: *const Value) -> bool;
  fn v8__Value__IsNull(this: *const Value) -> bool;
  fn v8__Value__IsNullOrUndefined(this: *const Value) -> bool;
  fn v8__Value__IsTrue(this: *const Value) -> bool;
  fn v8__Value__IsFalse(this: *const Value) -> bool;
  fn v8__Value__IsName(this: *const Value) -> bool;
  fn v8__Value__IsString(this: *const Value) -> bool;
  fn v8__Value__IsSymbol(this: *const Value) -> bool;
  fn v8__Value__IsFunction(this: *const Value) -> bool;
  fn v8__Value__IsArray(this: *const Value) -> bool;
  fn v8__Value__IsObject(this: *const Value) -> bool;
  fn v8__Value__IsBigInt(this: *const Value) -> bool;
  fn v8__Value__IsBoolean(this: *const Value) -> bool;
  fn v8__Value__IsNumber(this: *const Value) -> bool;
  fn v8__Value__IsExternal(this: *const Value) -> bool;
  fn v8__Value__IsInt32(this: *const Value) -> bool;
  fn v8__Value__IsUint32(this: *const Value) -> bool;
  fn v8__Value__IsDate(this: *const Value) -> bool;
  fn v8__Value__IsArgumentsObject(this: *const Value) -> bool;
  fn v8__Value__IsBigIntObject(this: *const Value) -> bool;
  fn v8__Value__IsBooleanObject(this: *const Value) -> bool;
  fn v8__Value__IsNumberObject(this: *const Value) -> bool;
  fn v8__Value__IsStringObject(this: *const Value) -> bool;
  fn v8__Value__IsSymbolObject(this: *const Value) -> bool;
  fn v8__Value__IsNativeError(this: *const Value) -> bool;
  fn v8__Value__IsRegExp(this: *const Value) -> bool;
  fn v8__Value__IsAsyncFunction(this: *const Value) -> bool;
  fn v8__Value__IsGeneratorFunction(this: *const Value) -> bool;
  #[allow(dead_code)]
  fn v8__Value__IsGeneratorObject(this: *const Value) -> bool;
  fn v8__Value__IsPromise(this: *const Value) -> bool;
  fn v8__Value__IsMap(this: *const Value) -> bool;
  fn v8__Value__IsSet(this: *const Value) -> bool;
  fn v8__Value__IsMapIterator(this: *const Value) -> bool;
  fn v8__Value__IsSetIterator(this: *const Value) -> bool;
  fn v8__Value__IsWeakMap(this: *const Value) -> bool;
  fn v8__Value__IsWeakSet(this: *const Value) -> bool;
  fn v8__Value__IsArrayBuffer(this: *const Value) -> bool;
  fn v8__Value__IsArrayBufferView(this: *const Value) -> bool;
  fn v8__Value__IsTypedArray(this: *const Value) -> bool;
  fn v8__Value__IsUint8Array(this: *const Value) -> bool;
  fn v8__Value__IsUint8ClampedArray(this: *const Value) -> bool;
  fn v8__Value__IsInt8Array(this: *const Value) -> bool;
  fn v8__Value__IsUint16Array(this: *const Value) -> bool;
  fn v8__Value__IsInt16Array(this: *const Value) -> bool;
  fn v8__Value__IsUint32Array(this: *const Value) -> bool;
  fn v8__Value__IsInt32Array(this: *const Value) -> bool;
  fn v8__Value__IsFloat32Array(this: *const Value) -> bool;
  fn v8__Value__IsFloat64Array(this: *const Value) -> bool;
  fn v8__Value__IsBigInt64Array(this: *const Value) -> bool;
  fn v8__Value__IsBigUint64Array(this: *const Value) -> bool;
  fn v8__Value__IsDataView(this: *const Value) -> bool;
  fn v8__Value__IsSharedArrayBuffer(this: *const Value) -> bool;
  fn v8__Value__IsProxy(this: *const Value) -> bool;
  fn v8__Value__IsWasmMemoryObject(this: *const Value) -> bool;
  fn v8__Value__IsWasmModuleObject(this: *const Value) -> bool;
  fn v8__Value__IsModuleNamespaceObject(this: *const Value) -> bool;
  fn v8__Value__StrictEquals(this: *const Value, that: *const Value) -> bool;
  fn v8__Value__SameValue(this: *const Value, that: *const Value) -> bool;
  fn v8__Value__InstanceOf(
    this: *const Value,
    context: *const Context,
    object: *const Object,
    out: *mut Maybe<bool>,
  );
  fn v8__Value__ToBigInt(
    this: *const Value,
    context: *const Context,
  ) -> *const BigInt;
  fn v8__Value__ToNumber(
    this: *const Value,
    context: *const Context,
  ) -> *const Number;
  fn v8__Value__ToString(
    this: *const Value,
    context: *const Context,
  ) -> *const String;
  fn v8__Value__ToDetailString(
    this: *const Value,
    context: *const Context,
  ) -> *const String;
  fn v8__Value__ToObject(
    this: *const Value,
    context: *const Context,
  ) -> *const Object;
  fn v8__Value__ToInteger(
    this: *const Value,
    context: *const Context,
  ) -> *const Integer;
  fn v8__Value__ToUint32(
    this: *const Value,
    context: *const Context,
  ) -> *const Uint32;
  fn v8__Value__ToInt32(
    this: *const Value,
    context: *const Context,
  ) -> *const Int32;
  fn v8__Value__ToBoolean(
    this: *const Value,
    isolate: *mut Isolate,
  ) -> *const Boolean;

  fn v8__Value__NumberValue(
    this: *const Value,
    context: *const Context,
    out: *mut Maybe<f64>,
  );
  fn v8__Value__IntegerValue(
    this: *const Value,
    context: *const Context,
    out: *mut Maybe<i64>,
  );
  fn v8__Value__Uint32Value(
    this: *const Value,
    context: *const Context,
    out: *mut Maybe<u32>,
  );
  fn v8__Value__Int32Value(
    this: *const Value,
    context: *const Context,
    out: *mut Maybe<i32>,
  );
  fn v8__Value__BooleanValue(this: *const Value, isolate: *mut Isolate)
    -> bool;
  fn v8__Value__GetHash(this: *const Value) -> int;
}

impl Value {
  /// Returns true if this value is the undefined value.  See ECMA-262 4.3.10.
  #[inline(always)]
  pub fn is_undefined(&self) -> bool {
    unsafe { v8__Value__IsUndefined(self) }
  }

  /// Returns true if this value is the null value.  See ECMA-262 4.3.11.
  #[inline(always)]
  pub fn is_null(&self) -> bool {
    unsafe { v8__Value__IsNull(self) }
  }

  /// Returns true if this value is either the null or the undefined value.
  /// See ECMA-262 4.3.11. and 4.3.12
  #[inline(always)]
  pub fn is_null_or_undefined(&self) -> bool {
    unsafe { v8__Value__IsNullOrUndefined(self) }
  }

  /// Returns true if this value is true.
  /// This is not the same as `BooleanValue()`. The latter performs a
  /// conversion to boolean, i.e. the result of `Boolean(value)` in JS, whereas
  /// this checks `value === true`.
  #[inline(always)]
  pub fn is_true(&self) -> bool {
    unsafe { v8__Value__IsTrue(self) }
  }

  /// Returns true if this value is false.
  /// This is not the same as `!BooleanValue()`. The latter performs a
  /// conversion to boolean, i.e. the result of `!Boolean(value)` in JS, whereas
  /// this checks `value === false`.
  #[inline(always)]
  pub fn is_false(&self) -> bool {
    unsafe { v8__Value__IsFalse(self) }
  }

  /// Returns true if this value is a symbol or a string.
  /// This is equivalent to
  /// `typeof value === 'string' || typeof value === 'symbol'` in JS.
  #[inline(always)]
  pub fn is_name(&self) -> bool {
    unsafe { v8__Value__IsName(self) }
  }

  /// Returns true if this value is an instance of the String type.
  /// See ECMA-262 8.4.
  #[inline(always)]
  pub fn is_string(&self) -> bool {
    unsafe { v8__Value__IsString(self) }
  }

  /// Returns true if this value is a symbol.
  /// This is equivalent to `typeof value === 'symbol'` in JS.
  #[inline(always)]
  pub fn is_symbol(&self) -> bool {
    unsafe { v8__Value__IsSymbol(self) }
  }

  /// Returns true if this value is a function.
  #[inline(always)]
  pub fn is_function(&self) -> bool {
    unsafe { v8__Value__IsFunction(self) }
  }

  /// Returns true if this value is an array. Note that it will return false for
  /// an Proxy for an array.
  #[inline(always)]
  pub fn is_array(&self) -> bool {
    unsafe { v8__Value__IsArray(self) }
  }

  /// Returns true if this value is an object.
  #[inline(always)]
  pub fn is_object(&self) -> bool {
    unsafe { v8__Value__IsObject(self) }
  }

  /// Returns true if this value is a bigint.
  /// This is equivalent to `typeof value === 'bigint'` in JS.
  #[inline(always)]
  pub fn is_big_int(&self) -> bool {
    unsafe { v8__Value__IsBigInt(self) }
  }

  /// Returns true if this value is boolean.
  /// This is equivalent to `typeof value === 'boolean'` in JS.
  #[inline(always)]
  pub fn is_boolean(&self) -> bool {
    unsafe { v8__Value__IsBoolean(self) }
  }

  /// Returns true if this value is a number.
  #[inline(always)]
  pub fn is_number(&self) -> bool {
    unsafe { v8__Value__IsNumber(self) }
  }

  /// Returns true if this value is an `External` object.
  #[inline(always)]
  pub fn is_external(&self) -> bool {
    unsafe { v8__Value__IsExternal(self) }
  }

  /// Returns true if this value is a 32-bit signed integer.
  #[inline(always)]
  pub fn is_int32(&self) -> bool {
    unsafe { v8__Value__IsInt32(self) }
  }

  /// Returns true if this value is a 32-bit unsigned integer.
  #[inline(always)]
  pub fn is_uint32(&self) -> bool {
    unsafe { v8__Value__IsUint32(self) }
  }

  /// Returns true if this value is a Date.
  #[inline(always)]
  pub fn is_date(&self) -> bool {
    unsafe { v8__Value__IsDate(self) }
  }

  /// Returns true if this value is an Arguments object.
  #[inline(always)]
  pub fn is_arguments_object(&self) -> bool {
    unsafe { v8__Value__IsArgumentsObject(self) }
  }

  /// Returns true if this value is a BigInt object.
  #[inline(always)]
  pub fn is_big_int_object(&self) -> bool {
    unsafe { v8__Value__IsBigIntObject(self) }
  }

  /// Returns true if this value is a Boolean object.
  #[inline(always)]
  pub fn is_boolean_object(&self) -> bool {
    unsafe { v8__Value__IsBooleanObject(self) }
  }

  /// Returns true if this value is a Number object.
  #[inline(always)]
  pub fn is_number_object(&self) -> bool {
    unsafe { v8__Value__IsNumberObject(self) }
  }

  /// Returns true if this value is a String object.
  #[inline(always)]
  pub fn is_string_object(&self) -> bool {
    unsafe { v8__Value__IsStringObject(self) }
  }

  /// Returns true if this value is a Symbol object.
  #[inline(always)]
  pub fn is_symbol_object(&self) -> bool {
    unsafe { v8__Value__IsSymbolObject(self) }
  }

  /// Returns true if this value is a NativeError.
  #[inline(always)]
  pub fn is_native_error(&self) -> bool {
    unsafe { v8__Value__IsNativeError(self) }
  }

  /// Returns true if this value is a RegExp.
  #[inline(always)]
  pub fn is_reg_exp(&self) -> bool {
    unsafe { v8__Value__IsRegExp(self) }
  }

  /// Returns true if this value is an async function.
  #[inline(always)]
  pub fn is_async_function(&self) -> bool {
    unsafe { v8__Value__IsAsyncFunction(self) }
  }

  /// Returns true if this value is a Generator function.
  #[inline(always)]
  pub fn is_generator_function(&self) -> bool {
    unsafe { v8__Value__IsGeneratorFunction(self) }
  }

  /// Returns true if this value is a Promise.
  #[inline(always)]
  pub fn is_promise(&self) -> bool {
    unsafe { v8__Value__IsPromise(self) }
  }

  /// Returns true if this value is a Map.
  #[inline(always)]
  pub fn is_map(&self) -> bool {
    unsafe { v8__Value__IsMap(self) }
  }

  /// Returns true if this value is a Set.
  #[inline(always)]
  pub fn is_set(&self) -> bool {
    unsafe { v8__Value__IsSet(self) }
  }

  /// Returns true if this value is a Map Iterator.
  #[inline(always)]
  pub fn is_map_iterator(&self) -> bool {
    unsafe { v8__Value__IsMapIterator(self) }
  }

  /// Returns true if this value is a Set Iterator.
  #[inline(always)]
  pub fn is_set_iterator(&self) -> bool {
    unsafe { v8__Value__IsSetIterator(self) }
  }

  /// Returns true if this value is a WeakMap.
  #[inline(always)]
  pub fn is_weak_map(&self) -> bool {
    unsafe { v8__Value__IsWeakMap(self) }
  }

  /// Returns true if this value is a WeakSet.
  #[inline(always)]
  pub fn is_weak_set(&self) -> bool {
    unsafe { v8__Value__IsWeakSet(self) }
  }

  /// Returns true if this value is an ArrayBuffer.
  #[inline(always)]
  pub fn is_array_buffer(&self) -> bool {
    unsafe { v8__Value__IsArrayBuffer(self) }
  }

  /// Returns true if this value is an ArrayBufferView.
  #[inline(always)]
  pub fn is_array_buffer_view(&self) -> bool {
    unsafe { v8__Value__IsArrayBufferView(self) }
  }

  /// Returns true if this value is one of TypedArrays.
  #[inline(always)]
  pub fn is_typed_array(&self) -> bool {
    unsafe { v8__Value__IsTypedArray(self) }
  }

  /// Returns true if this value is an Uint8Array.
  #[inline(always)]
  pub fn is_uint8_array(&self) -> bool {
    unsafe { v8__Value__IsUint8Array(self) }
  }

  /// Returns true if this value is an Uint8ClampedArray.
  #[inline(always)]
  pub fn is_uint8_clamped_array(&self) -> bool {
    unsafe { v8__Value__IsUint8ClampedArray(self) }
  }

  /// Returns true if this value is an Int8Array.
  #[inline(always)]
  pub fn is_int8_array(&self) -> bool {
    unsafe { v8__Value__IsInt8Array(self) }
  }

  /// Returns true if this value is an Uint16Array.
  #[inline(always)]
  pub fn is_uint16_array(&self) -> bool {
    unsafe { v8__Value__IsUint16Array(self) }
  }

  /// Returns true if this value is an Int16Array.
  #[inline(always)]
  pub fn is_int16_array(&self) -> bool {
    unsafe { v8__Value__IsInt16Array(self) }
  }

  /// Returns true if this value is an Uint32Array.
  #[inline(always)]
  pub fn is_uint32_array(&self) -> bool {
    unsafe { v8__Value__IsUint32Array(self) }
  }

  /// Returns true if this value is an Int32Array.
  #[inline(always)]
  pub fn is_int32_array(&self) -> bool {
    unsafe { v8__Value__IsInt32Array(self) }
  }

  /// Returns true if this value is a Float32Array.
  #[inline(always)]
  pub fn is_float32_array(&self) -> bool {
    unsafe { v8__Value__IsFloat32Array(self) }
  }

  /// Returns true if this value is a Float64Array.
  #[inline(always)]
  pub fn is_float64_array(&self) -> bool {
    unsafe { v8__Value__IsFloat64Array(self) }
  }

  /// Returns true if this value is a BigInt64Array.
  #[inline(always)]
  pub fn is_big_int64_array(&self) -> bool {
    unsafe { v8__Value__IsBigInt64Array(self) }
  }

  /// Returns true if this value is a BigUint64Array.
  #[inline(always)]
  pub fn is_big_uint64_array(&self) -> bool {
    unsafe { v8__Value__IsBigUint64Array(self) }
  }

  /// Returns true if this value is a DataView.
  #[inline(always)]
  pub fn is_data_view(&self) -> bool {
    unsafe { v8__Value__IsDataView(self) }
  }

  /// Returns true if this value is a SharedArrayBuffer.
  /// This is an experimental feature.
  #[inline(always)]
  pub fn is_shared_array_buffer(&self) -> bool {
    unsafe { v8__Value__IsSharedArrayBuffer(self) }
  }

  /// Returns true if this value is a JavaScript Proxy.
  #[inline(always)]
  pub fn is_proxy(&self) -> bool {
    unsafe { v8__Value__IsProxy(self) }
  }

  /// Returns true if this value is a WasmMemoryObject.
  #[inline(always)]
  pub fn is_wasm_memory_object(&self) -> bool {
    unsafe { v8__Value__IsWasmMemoryObject(self) }
  }

  /// Returns true if this value is a WasmModuleObject.
  #[inline(always)]
  pub fn is_wasm_module_object(&self) -> bool {
    unsafe { v8__Value__IsWasmModuleObject(self) }
  }

  /// Returns true if the value is a Module Namespace Object.
  #[inline(always)]
  pub fn is_module_namespace_object(&self) -> bool {
    unsafe { v8__Value__IsModuleNamespaceObject(self) }
  }

  #[inline(always)]
  pub fn strict_equals(&self, that: Local<Value>) -> bool {
    unsafe { v8__Value__StrictEquals(self, &*that) }
  }

  #[inline(always)]
  pub fn same_value(&self, that: Local<Value>) -> bool {
    unsafe { v8__Value__SameValue(self, &*that) }
  }

  /// Implements the the abstract operation `SameValueZero`, which is defined in
  /// ECMA-262 6th edition § 7.2.10
  /// (http://ecma-international.org/ecma-262/6.0/#sec-samevaluezero).
  ///
  /// This operation is used to compare values for the purpose of insertion into
  /// a `Set`, or determining whether `Map` keys are equivalent. Its semantics
  /// are almost the same as `strict_equals()` and `same_value()`, with the
  /// following important distinctions:
  ///   - It considers `NaN` equal to `NaN` (unlike `strict_equals()`).
  ///   - It considers `-0` equal to `0` (unlike `same_value()`).
  #[inline(always)]
  pub fn same_value_zero(&self, that: Local<Value>) -> bool {
    // The SMI representation of zero is also zero. In debug builds, double
    // check this, so in the unlikely event that V8 changes its internal
    // representation of SMIs such that this invariant no longer holds, we'd
    // catch it.
    self.same_value(that) || {
      let zero = Integer::zero().into();
      self.strict_equals(zero) && that.strict_equals(zero)
    }
  }

  #[inline(always)]
  pub fn to_big_int<'s>(
    &self,
    scope: &mut HandleScope<'s>,
  ) -> Option<Local<'s, BigInt>> {
    unsafe {
      scope
        .cast_local(|sd| v8__Value__ToBigInt(self, &*sd.get_current_context()))
    }
  }

  #[inline(always)]
  pub fn to_number<'s>(
    &self,
    scope: &mut HandleScope<'s>,
  ) -> Option<Local<'s, Number>> {
    unsafe {
      scope
        .cast_local(|sd| v8__Value__ToNumber(self, &*sd.get_current_context()))
    }
  }

  #[inline(always)]
  pub fn to_string<'s>(
    &self,
    scope: &mut HandleScope<'s>,
  ) -> Option<Local<'s, String>> {
    unsafe {
      scope
        .cast_local(|sd| v8__Value__ToString(self, &*sd.get_current_context()))
    }
  }

  /// Convenience function not present in the original V8 API.
  #[inline(always)]
  pub fn to_rust_string_lossy<'s>(
    &self,
    scope: &mut HandleScope<'s>,
  ) -> std::string::String {
    self
      .to_string(scope)
      .map_or_else(std::string::String::new, |s| s.to_rust_string_lossy(scope))
  }

  #[inline(always)]
  pub fn to_detail_string<'s>(
    &self,
    scope: &mut HandleScope<'s>,
  ) -> Option<Local<'s, String>> {
    unsafe {
      scope.cast_local(|sd| {
        v8__Value__ToDetailString(self, &*sd.get_current_context())
      })
    }
  }

  #[inline(always)]
  pub fn to_object<'s>(
    &self,
    scope: &mut HandleScope<'s>,
  ) -> Option<Local<'s, Object>> {
    unsafe {
      scope
        .cast_local(|sd| v8__Value__ToObject(self, &*sd.get_current_context()))
    }
  }

  #[inline(always)]
  pub fn to_integer<'s>(
    &self,
    scope: &mut HandleScope<'s>,
  ) -> Option<Local<'s, Integer>> {
    unsafe {
      scope
        .cast_local(|sd| v8__Value__ToInteger(self, &*sd.get_current_context()))
    }
  }

  #[inline(always)]
  pub fn to_uint32<'s>(
    &self,
    scope: &mut HandleScope<'s>,
  ) -> Option<Local<'s, Uint32>> {
    unsafe {
      scope
        .cast_local(|sd| v8__Value__ToUint32(self, &*sd.get_current_context()))
    }
  }

  #[inline(always)]
  pub fn to_int32<'s>(
    &self,
    scope: &mut HandleScope<'s>,
  ) -> Option<Local<'s, Int32>> {
    unsafe {
      scope
        .cast_local(|sd| v8__Value__ToInt32(self, &*sd.get_current_context()))
    }
  }

  /// Perform the equivalent of Boolean(value) in JS. This can never fail.
  #[inline(always)]
  pub fn to_boolean<'s>(
    &self,
    scope: &mut HandleScope<'s, ()>,
  ) -> Local<'s, Boolean> {
    unsafe {
      scope.cast_local(|sd| v8__Value__ToBoolean(self, sd.get_isolate_ptr()))
    }
    .unwrap()
  }

  #[inline(always)]
  pub fn instance_of<'s>(
    &self,
    scope: &mut HandleScope<'s>,
    object: Local<Object>,
  ) -> Option<bool> {
    let mut out = Maybe::<bool>::default();
    unsafe {
      v8__Value__InstanceOf(
        self,
        &*scope.get_current_context(),
        &*object,
        &mut out,
      );
    }
    out.into()
  }

  #[inline(always)]
  pub fn number_value<'s>(&self, scope: &mut HandleScope<'s>) -> Option<f64> {
    let mut out = Maybe::<f64>::default();
    unsafe {
      v8__Value__NumberValue(self, &*scope.get_current_context(), &mut out)
    };
    out.into()
  }

  #[inline(always)]
  pub fn integer_value<'s>(&self, scope: &mut HandleScope<'s>) -> Option<i64> {
    let mut out = Maybe::<i64>::default();
    unsafe {
      v8__Value__IntegerValue(self, &*scope.get_current_context(), &mut out)
    };
    out.into()
  }

  #[inline(always)]
  pub fn uint32_value<'s>(&self, scope: &mut HandleScope<'s>) -> Option<u32> {
    let mut out = Maybe::<u32>::default();
    unsafe {
      v8__Value__Uint32Value(self, &*scope.get_current_context(), &mut out)
    };
    out.into()
  }

  #[inline(always)]
  pub fn int32_value<'s>(&self, scope: &mut HandleScope<'s>) -> Option<i32> {
    let mut out = Maybe::<i32>::default();
    unsafe {
      v8__Value__Int32Value(self, &*scope.get_current_context(), &mut out)
    };
    out.into()
  }

  #[inline(always)]
  pub fn boolean_value<'s>(&self, scope: &mut HandleScope<'s, ()>) -> bool {
    unsafe { v8__Value__BooleanValue(self, scope.get_isolate_ptr()) }
  }

  /// Returns the V8 hash value for this value. The current implementation
  /// uses a hidden property to store the identity hash on some object types.
  ///
  /// The return value will never be 0. Also, it is not guaranteed to be
  /// unique.
  #[inline(always)]
  pub fn get_hash(&self) -> NonZeroI32 {
    unsafe { NonZeroI32::new_unchecked(v8__Value__GetHash(self)) }
  }
}