49 lines
1.3 KiB
JavaScript
49 lines
1.3 KiB
JavaScript
|
'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(ES, Desc) {
|
||
|
|
if (ES.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(ES, recordType, argumentName, value) {
|
||
|
|
var predicate = predicates[recordType];
|
||
|
|
if (typeof predicate !== 'function') {
|
||
|
|
throw new $SyntaxError('unknown record type: ' + recordType);
|
||
|
|
}
|
||
|
|
if (!predicate(ES, value)) {
|
||
|
|
throw new $TypeError(argumentName + ' must be a ' + recordType);
|
||
|
|
}
|
||
|
|
};
|