| // Copyright (C) 2016 the V8 project authors. All rights reserved. |
| // Copyright (C) 2017 Mozilla Corporation. All rights reserved. |
| // This code is governed by the BSD license found in the LICENSE file. |
| /*--- |
| esid: sec-typedarray-buffer-byteoffset-length |
| description: > |
| Use prototype from new target if it's an Object |
| info: | |
| 22.2.4.5 TypedArray ( buffer [ , byteOffset [ , length ] ] ) |
| |
| 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 an [[ArrayBufferData]] internal slot. |
| |
| ... |
| 4. Let O be ? AllocateTypedArray(constructorName, NewTarget, |
| %TypedArrayPrototype%). |
| ... |
| |
| 22.2.4.2.1 Runtime Semantics: AllocateTypedArray (constructorName, newTarget, |
| defaultProto [ , length ]) |
| |
| 1. Let proto be ? GetPrototypeFromConstructor(newTarget, defaultProto). |
| 2. Let obj be IntegerIndexedObjectCreate (proto, «[[ViewedArrayBuffer]], |
| [[TypedArrayName]], [[ByteLength]], [[ByteOffset]], [[ArrayLength]]» ). |
| ... |
| |
| 9.4.5.7 IntegerIndexedObjectCreate (prototype, internalSlotsList) |
| |
| ... |
| 10. Set the [[Prototype]] internal slot of A to prototype. |
| ... |
| 12. Return A. |
| includes: [testTypedArray.js] |
| features: [SharedArrayBuffer, Reflect, TypedArray] |
| ---*/ |
| |
| var buffer = new SharedArrayBuffer(8); |
| |
| function newTarget() {} |
| var proto = {}; |
| newTarget.prototype = proto; |
| |
| testWithTypedArrayConstructors(function(TA) { |
| var ta = Reflect.construct(TA, [buffer], newTarget); |
| |
| assert.sameValue(ta.constructor, Object); |
| assert.sameValue(Object.getPrototypeOf(ta), proto); |
| }); |