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'use strict';
var GetIntrinsic = require('get-intrinsic');
var $TypeError = GetIntrinsic('%TypeError%');
var $SyntaxError = GetIntrinsic('%SyntaxError%');
var has = require('has');
var isInteger = require('./isInteger');
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]]']);
},
'RegExp Record': function isRegExpRecord(value) {
return value
&& has(value, '[[IgnoreCase]]')
&& typeof value['[[IgnoreCase]]'] === 'boolean'
&& has(value, '[[Multiline]]')
&& typeof value['[[Multiline]]'] === 'boolean'
&& has(value, '[[DotAll]]')
&& typeof value['[[DotAll]]'] === 'boolean'
&& has(value, '[[Unicode]]')
&& typeof value['[[Unicode]]'] === 'boolean'
&& has(value, '[[CapturingGroupsCount]]')
&& typeof value['[[CapturingGroupsCount]]'] === 'number'
&& isInteger(value['[[CapturingGroupsCount]]'])
&& value['[[CapturingGroupsCount]]'] >= 0;
}
};
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);
}
};