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node_modules/es-abstract/helpers/assertRecord.js
| 48 lines
| 1.3 KiB
| application/javascript
| JavascriptLexer
|
| r789 | 'use strict'; | |||
| var GetIntrinsic = require('../GetIntrinsic'); | ||||
| var $TypeError = GetIntrinsic('%TypeError%'); | ||||
| var $SyntaxError = GetIntrinsic('%SyntaxError%'); | ||||
| var has = require('has'); | ||||
| var predicates = { | ||||
| // https://ecma-international.org/ecma-262/6.0/#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); | ||||
| } | ||||
| }; | ||||