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20 lines
783 B
JavaScript
20 lines
783 B
JavaScript
6 years ago
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var Set = require('./es6.set');
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var from = require('./_array-from-iterable');
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var metadata = require('./_metadata');
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var anObject = require('./_an-object');
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var getPrototypeOf = require('./_object-gpo');
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var ordinaryOwnMetadataKeys = metadata.keys;
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var 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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var 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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