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musix-oss/node_modules/es-abstract/2016/Get.js
2020-03-03 22:30:50 +02:00

31 lines
734 B
JavaScript

'use strict';
var GetIntrinsic = require('../GetIntrinsic');
var $TypeError = GetIntrinsic('%TypeError%');
var inspect = require('object-inspect');
var IsPropertyKey = require('./IsPropertyKey');
var Type = require('./Type');
/**
* 7.3.1 Get (O, P) - https://ecma-international.org/ecma-262/6.0/#sec-get-o-p
* 1. Assert: Type(O) is Object.
* 2. Assert: IsPropertyKey(P) is true.
* 3. Return O.[[Get]](P, O).
*/
module.exports = function Get(O, P) {
// 7.3.1.1
if (Type(O) !== 'Object') {
throw new $TypeError('Assertion failed: Type(O) is not Object');
}
// 7.3.1.2
if (!IsPropertyKey(P)) {
throw new $TypeError('Assertion failed: IsPropertyKey(P) is not true, got ' + inspect(P));
}
// 7.3.1.3
return O[P];
};