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// 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%.prototype.subarray
description: >
Use custom @@species constructor if available
info: |
22.2.3.27 %TypedArray%.prototype.subarray( begin , end )
...
17. Return ? TypedArraySpeciesCreate(O, argumentsList).
22.2.4.7 TypedArraySpeciesCreate ( exemplar, argumentList )
...
3. Let constructor be ? SpeciesConstructor(exemplar, defaultConstructor).
4. Return ? TypedArrayCreate(constructor, argumentList).
7.3.20 SpeciesConstructor ( O, defaultConstructor )
...
5. Let S be ? Get(C, @@species).
...
7. If IsConstructor(S) is true, return S.
...
22.2.4.6 TypedArrayCreate ( constructor, argumentList )
1. Let newTypedArray be ? Construct(constructor, argumentList).
2. Perform ? ValidateTypedArray(newTypedArray).
3. If argumentList is a List of a single Number, then
...
4. Return newTypedArray.
includes: [testBigIntTypedArray.js, compareArray.js]
features: [BigInt, Symbol.species, TypedArray]
---*/
testWithBigIntTypedArrayConstructors(function(TA) {
var sample = new TA(convertToBigInt([40, 41, 42]));
var calls = 0;
var result;
sample.constructor = {};
sample.constructor[Symbol.species] = function(buffer, offset, length) {
calls++;
return new TA(buffer, offset, length);
};
result = sample.subarray(1);
assert.sameValue(calls, 1, "ctor called once");
assert(compareArray(result, convertToBigInt([41, 42])), "expected subarray");
});
|
