40 lines
1.4 KiB
Plaintext
40 lines
1.4 KiB
Plaintext
|
'use strict';
|
||
|
|
||
|
var GetIntrinsic = require('get-intrinsic');
|
||
|
|
||
|
var $SyntaxError = GetIntrinsic('%SyntaxError%');
|
||
|
var $TypeError = GetIntrinsic('%TypeError%');
|
||
|
|
||
|
var whichTypedArray = require('which-typed-array');
|
||
|
var availableTypedArrays = require('available-typed-arrays')();
|
||
|
|
||
|
var IsArray = require('./IsArray');
|
||
|
var SpeciesConstructor = require('./SpeciesConstructor');
|
||
|
var TypedArrayCreate = require('./TypedArrayCreate');
|
||
|
|
||
|
var getConstructor = require('../helpers/typedArrayConstructors');
|
||
|
|
||
|
// https://262.ecma-international.org/7.0/#typedarray-species-create
|
||
|
|
||
|
module.exports = function TypedArraySpeciesCreate(exemplar, argumentList) {
|
||
|
if (availableTypedArrays.length === 0) {
|
||
|
throw new $SyntaxError('Assertion failed: Typed Arrays are not supported in this environment');
|
||
|
}
|
||
|
|
||
|
var kind = whichTypedArray(exemplar);
|
||
|
if (!kind) {
|
||
|
throw new $TypeError('Assertion failed: exemplar must be a TypedArray'); // step 1
|
||
|
}
|
||
|
if (!IsArray(argumentList)) {
|
||
|
throw new $TypeError('Assertion failed: `argumentList` must be a List'); // step 1
|
||
|
}
|
||
|
|
||
|
var defaultConstructor = getConstructor(kind); // step 2
|
||
|
if (typeof defaultConstructor !== 'function') {
|
||
|
throw new $SyntaxError('Assertion failed: `constructor` of `exemplar` (' + kind + ') must exist. Please report this!');
|
||
|
}
|
||
|
var constructor = SpeciesConstructor(exemplar, defaultConstructor); // step 3
|
||
|
|
||
|
return TypedArrayCreate(constructor, argumentList); // step 4
|
||
|
};
|