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38 lines
1.4 KiB
Plaintext
38 lines
1.4 KiB
Plaintext
'use strict';
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var $SyntaxError = require('es-errors/syntax');
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var $TypeError = require('es-errors/type');
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var whichTypedArray = require('which-typed-array');
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var availableTypedArrays = require('available-typed-arrays')();
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var IsArray = require('./IsArray');
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var SpeciesConstructor = require('./SpeciesConstructor');
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var TypedArrayCreateFromConstructor = require('./TypedArrayCreateFromConstructor');
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var getConstructor = require('../helpers/typedArrayConstructors');
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// https://262.ecma-international.org/15.0/#typedarray-species-create
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module.exports = function TypedArraySpeciesCreate(exemplar, argumentList) {
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if (availableTypedArrays.length === 0) {
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throw new $SyntaxError('Assertion failed: Typed Arrays are not supported in this environment');
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}
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var kind = whichTypedArray(exemplar);
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if (!kind) {
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throw new $TypeError('Assertion failed: exemplar must be a TypedArray'); // step 1
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}
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if (!IsArray(argumentList)) {
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throw new $TypeError('Assertion failed: `argumentList` must be a List'); // step 1
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}
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var defaultConstructor = getConstructor(kind); // step 2
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if (typeof defaultConstructor !== 'function') {
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throw new $SyntaxError('Assertion failed: `constructor` of `exemplar` (' + kind + ') must exist. Please report this!');
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}
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var constructor = SpeciesConstructor(exemplar, defaultConstructor); // step 3
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return TypedArrayCreateFromConstructor(constructor, argumentList); // step 4
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};
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