| // Copyright (C) 2016 the V8 project authors. All rights reserved. |
| // This code is governed by the BSD license found in the LICENSE file. |
| /*--- |
| esid: sec-typedarray-typedarray |
| description: > |
| Derive the ArrayBuffer prototype from the realm of the species constructor |
| info: | |
| 22.2.4.3 TypedArray ( typedArray ) |
| |
| This description applies only if the TypedArray function is called with at |
| least one argument and the Type of the first argument is Object and that |
| object has a [[TypedArrayName]] internal slot. |
| |
| ... |
| 18. Else, |
| a. Let bufferConstructor be ? SpeciesConstructor(srcData, %ArrayBuffer%). |
| b. Let data be ? AllocateArrayBuffer(bufferConstructor, byteLength). |
| ... |
| |
| 7.3.20 SpeciesConstructor ( O, defaultConstructor ) |
| |
| ... |
| 5. Let S be ? Get(C, @@species). |
| 6. If S is either undefined or null, return defaultConstructor. |
| 7. If IsConstructor(S) is true, return S. |
| ... |
| |
| 9.1.14 GetPrototypeFromConstructor |
| |
| ... |
| 3. Let proto be ? Get(constructor, "prototype"). |
| 4. If Type(proto) is not Object, then |
| a. Let realm be ? GetFunctionRealm(constructor). |
| b. Let proto be realm's intrinsic object named intrinsicDefaultProto. |
| ... |
| includes: [testBigIntTypedArray.js] |
| features: [BigInt, cross-realm, Symbol.species, TypedArray] |
| ---*/ |
| |
| var sample1 = new BigInt64Array(); |
| var sample2 = new BigUint64Array(); |
| var other = $262.createRealm().global; |
| var C = new other.Function(); |
| C.prototype = null; |
| |
| testWithBigIntTypedArrayConstructors(function(TA) { |
| var sample = TA === BigInt64Array ? sample2 : sample1; |
| var ctor = {}; |
| |
| sample.buffer.constructor = ctor; |
| |
| ctor[Symbol.species] = C; |
| |
| var typedArray = new TA(sample); |
| assert.sameValue( |
| Object.getPrototypeOf(typedArray.buffer), other.ArrayBuffer.prototype |
| ); |
| }); |