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