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- 'use strict';
- var GetIntrinsic = require('get-intrinsic');
- var $TypeError = GetIntrinsic('%TypeError%');
- var $SyntaxError = GetIntrinsic('%SyntaxError%');
- var has = require('has');
- var predicates = {
- // https://262.ecma-international.org/6.0/#sec-property-descriptor-specification-type
- 'Property Descriptor': function isPropertyDescriptor(Type, Desc) {
- if (Type(Desc) !== 'Object') {
- return false;
- }
- var allowed = {
- '[[Configurable]]': true,
- '[[Enumerable]]': true,
- '[[Get]]': true,
- '[[Set]]': true,
- '[[Value]]': true,
- '[[Writable]]': true
- };
- for (var key in Desc) { // eslint-disable-line
- if (has(Desc, key) && !allowed[key]) {
- return false;
- }
- }
- var isData = has(Desc, '[[Value]]');
- var IsAccessor = has(Desc, '[[Get]]') || has(Desc, '[[Set]]');
- if (isData && IsAccessor) {
- throw new $TypeError('Property Descriptors may not be both accessor and data descriptors');
- }
- return true;
- }
- };
- module.exports = function assertRecord(Type, recordType, argumentName, value) {
- var predicate = predicates[recordType];
- if (typeof predicate !== 'function') {
- throw new $SyntaxError('unknown record type: ' + recordType);
- }
- if (!predicate(Type, value)) {
- throw new $TypeError(argumentName + ' must be a ' + recordType);
- }
- };
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