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authorGravatar Piotr Russ <mail@pruss.it> 2020-11-16 00:10:28 +0100
committerGravatar Piotr Russ <mail@pruss.it> 2020-11-16 00:10:28 +0100
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+'use strict';
+
+var GetIntrinsic = require('../GetIntrinsic');
+
+var $TypeError = GetIntrinsic('%TypeError%');
+
+var IsPropertyKey = require('./IsPropertyKey');
+var SameValue = require('./SameValue');
+var Type = require('./Type');
+
+// IE 9 does not throw in strict mode when writability/configurability/extensibility is violated
+var noThrowOnStrictViolation = (function () {
+ try {
+ delete [].length;
+ return true;
+ } catch (e) {
+ return false;
+ }
+}());
+
+// https://ecma-international.org/ecma-262/6.0/#sec-set-o-p-v-throw
+
+module.exports = function Set(O, P, V, Throw) {
+ if (Type(O) !== 'Object') {
+ throw new $TypeError('Assertion failed: `O` must be an Object');
+ }
+ if (!IsPropertyKey(P)) {
+ throw new $TypeError('Assertion failed: `P` must be a Property Key');
+ }
+ if (Type(Throw) !== 'Boolean') {
+ throw new $TypeError('Assertion failed: `Throw` must be a Boolean');
+ }
+ if (Throw) {
+ O[P] = V; // eslint-disable-line no-param-reassign
+ if (noThrowOnStrictViolation && !SameValue(O[P], V)) {
+ throw new $TypeError('Attempted to assign to readonly property.');
+ }
+ return true;
+ } else {
+ try {
+ O[P] = V; // eslint-disable-line no-param-reassign
+ return noThrowOnStrictViolation ? SameValue(O[P], V) : true;
+ } catch (e) {
+ return false;
+ }
+ }
+};