| 'use strict'; | 
|   | 
| var GetIntrinsic = require('get-intrinsic'); | 
|   | 
| var $TypeError = GetIntrinsic('%TypeError%'); | 
| var $SyntaxError = GetIntrinsic('%SyntaxError%'); | 
|   | 
| var has = require('has'); | 
|   | 
| var isMatchRecord = require('./isMatchRecord'); | 
|   | 
| var predicates = { | 
|     // https://262.ecma-international.org/6.0/#sec-property-descriptor-specification-type | 
|     'Property Descriptor': function isPropertyDescriptor(Desc) { | 
|         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; | 
|     }, | 
|     // https://262.ecma-international.org/13.0/#sec-match-records | 
|     'Match Record': isMatchRecord, | 
|     'Iterator Record': function isIteratorRecord(value) { | 
|         return has(value, '[[Iterator]]') && has(value, '[[NextMethod]]') && has(value, '[[Done]]'); | 
|     }, | 
|     'PromiseCapability Record': function isPromiseCapabilityRecord(value) { | 
|         return value | 
|             && has(value, '[[Resolve]]') | 
|             && typeof value['[[Resolve]]'] === 'function' | 
|             && has(value, '[[Reject]]') | 
|             && typeof value['[[Reject]]'] === 'function' | 
|             && has(value, '[[Promise]]') | 
|             && value['[[Promise]]'] | 
|             && typeof value['[[Promise]]'].then === 'function'; | 
|     }, | 
|     'AsyncGeneratorRequest Record': function isAsyncGeneratorRequestRecord(value) { | 
|         return value | 
|             && has(value, '[[Completion]]') // TODO: confirm is a completion record | 
|             && has(value, '[[Capability]]') | 
|             && predicates['PromiseCapability Record'](value['[[Capability]]']); | 
|     } | 
| }; | 
|   | 
| module.exports = function assertRecord(Type, recordType, argumentName, value) { | 
|     var predicate = predicates[recordType]; | 
|     if (typeof predicate !== 'function') { | 
|         throw new $SyntaxError('unknown record type: ' + recordType); | 
|     } | 
|     if (Type(value) !== 'Object' || !predicate(value)) { | 
|         throw new $TypeError(argumentName + ' must be a ' + recordType); | 
|     } | 
| }; |