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on this file was 6a3a178, checked in by Ema <ema_spirova@…>, 3 years ago |
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1 | var $ = require('../internals/export');
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2 | var ReflectMetadataModule = require('../internals/reflect-metadata');
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3 | var anObject = require('../internals/an-object');
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4 | var getPrototypeOf = require('../internals/object-get-prototype-of');
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5 |
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6 | var ordinaryHasOwnMetadata = ReflectMetadataModule.has;
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7 | var toMetadataKey = ReflectMetadataModule.toKey;
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8 |
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9 | var ordinaryHasMetadata = function (MetadataKey, O, P) {
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10 | var hasOwn = ordinaryHasOwnMetadata(MetadataKey, O, P);
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11 | if (hasOwn) return true;
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12 | var parent = getPrototypeOf(O);
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13 | return parent !== null ? ordinaryHasMetadata(MetadataKey, parent, P) : false;
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14 | };
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15 |
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16 | // `Reflect.hasMetadata` method
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17 | // https://github.com/rbuckton/reflect-metadata
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18 | $({ target: 'Reflect', stat: true }, {
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19 | hasMetadata: function hasMetadata(metadataKey, target /* , targetKey */) {
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20 | var targetKey = arguments.length < 3 ? undefined : toMetadataKey(arguments[2]);
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21 | return ordinaryHasMetadata(metadataKey, anObject(target), targetKey);
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22 | }
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23 | });
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