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23 lines
959 B
23 lines
959 B
var $ = require('../internals/export'); |
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var ReflectMetadataModule = require('../internals/reflect-metadata'); |
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var anObject = require('../internals/an-object'); |
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var getPrototypeOf = require('../internals/object-get-prototype-of'); |
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var ordinaryHasOwnMetadata = ReflectMetadataModule.has; |
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var toMetadataKey = ReflectMetadataModule.toKey; |
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var ordinaryHasMetadata = function (MetadataKey, O, P) { |
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var hasOwn = ordinaryHasOwnMetadata(MetadataKey, O, P); |
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if (hasOwn) return true; |
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var parent = getPrototypeOf(O); |
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return parent !== null ? ordinaryHasMetadata(MetadataKey, parent, P) : false; |
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}; |
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// `Reflect.hasMetadata` method |
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// https://github.com/rbuckton/reflect-metadata |
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$({ target: 'Reflect', stat: true }, { |
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hasMetadata: function hasMetadata(metadataKey, target /* , targetKey */) { |
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var targetKey = arguments.length < 3 ? undefined : toMetadataKey(arguments[2]); |
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return ordinaryHasMetadata(metadataKey, anObject(target), targetKey); |
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} |
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});
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