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Dir : ~/usr/share/nodejs/core-js/modules/

View File Name : esnext.reflect.get-metadata.js

// TODO: Remove from `core-js@4`
var $ = require('../internals/export');
var ReflectMetadataModule = require('../internals/reflect-metadata');
var anObject = require('../internals/an-object');
var getPrototypeOf = require('../internals/object-get-prototype-of');

var ordinaryHasOwnMetadata = ReflectMetadataModule.has;
var ordinaryGetOwnMetadata = ReflectMetadataModule.get;
var toMetadataKey = ReflectMetadataModule.toKey;

var ordinaryGetMetadata = function (MetadataKey, O, P) {
  var hasOwn = ordinaryHasOwnMetadata(MetadataKey, O, P);
  if (hasOwn) return ordinaryGetOwnMetadata(MetadataKey, O, P);
  var parent = getPrototypeOf(O);
  return parent !== null ? ordinaryGetMetadata(MetadataKey, parent, P) : undefined;
};

// `Reflect.getMetadata` method
// https://github.com/rbuckton/reflect-metadata
$({ target: 'Reflect', stat: true }, {
  getMetadata: function getMetadata(metadataKey, target /* , targetKey */) {
    var targetKey = arguments.length < 3 ? undefined : toMetadataKey(arguments[2]);
    return ordinaryGetMetadata(metadataKey, anObject(target), targetKey);
  }
});