| var Set = require('./es6.set'); |
| var from = require('./_array-from-iterable'); |
| var metadata = require('./_metadata'); |
| var anObject = require('./_an-object'); |
| var getPrototypeOf = require('./_object-gpo'); |
| var ordinaryOwnMetadataKeys = metadata.keys; |
| var toMetaKey = metadata.key; |
| |
| var ordinaryMetadataKeys = function (O, P) { |
| var oKeys = ordinaryOwnMetadataKeys(O, P); |
| var parent = getPrototypeOf(O); |
| if (parent === null) return oKeys; |
| var pKeys = ordinaryMetadataKeys(parent, P); |
| return pKeys.length ? oKeys.length ? from(new Set(oKeys.concat(pKeys))) : pKeys : oKeys; |
| }; |
| |
| metadata.exp({ getMetadataKeys: function getMetadataKeys(target /* , targetKey */) { |
| return ordinaryMetadataKeys(anObject(target), arguments.length < 2 ? undefined : toMetaKey(arguments[1])); |
| } }); |