es7.reflect.has-metadata.js

var metadata = require('./_metadata');
var anObject = require('./_an-object');
var getPrototypeOf = require('./_object-gpo');
var ordinaryHasOwnMetadata = metadata.has;
var toMetaKey = metadata.key;

var ordinaryHasMetadata = function (MetadataKey, O, P) {
  var hasOwn = ordinaryHasOwnMetadata(MetadataKey, O, P);
  if (hasOwn) return true;
  var parent = getPrototypeOf(O);
  return parent !== null ? ordinaryHasMetadata(MetadataKey, parent, P) : false;
};

metadata.exp({ hasMetadata: function hasMetadata(metadataKey, target /* , targetKey */) {
  return ordinaryHasMetadata(metadataKey, anObject(target), arguments.length < 3 ? undefined : toMetaKey(arguments[2]));
} });