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19 lines
783 B
19 lines
783 B
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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