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'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);
}
};
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