mirror of https://github.com/jkjoy/sunpeiwen.git
72 lines
2.2 KiB
JavaScript
72 lines
2.2 KiB
JavaScript
|
'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
|
||
|
|
};
|
||
|
|
|
||
|
|
if (!Desc) {
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
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);
|
||
|
|
}
|
||
|
|
};
|