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node_modules/core-js/internals/reflect-metadata.js

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+'use strict';
+// TODO: in core-js@4, move /modules/ dependencies to public entries for better optimization by tools like `preset-env`
+require('../modules/es.map');
+require('../modules/es.weak-map');
+var getBuiltIn = require('../internals/get-built-in');
+var uncurryThis = require('../internals/function-uncurry-this');
+var shared = require('../internals/shared');
+
+var Map = getBuiltIn('Map');
+var WeakMap = getBuiltIn('WeakMap');
+var push = uncurryThis([].push);
+
+var metadata = shared('metadata');
+var store = metadata.store || (metadata.store = new WeakMap());
+
+var getOrCreateMetadataMap = function (target, targetKey, create) {
+  var targetMetadata = store.get(target);
+  if (!targetMetadata) {
+    if (!create) return;
+    store.set(target, targetMetadata = new Map());
+  }
+  var keyMetadata = targetMetadata.get(targetKey);
+  if (!keyMetadata) {
+    if (!create) return;
+    targetMetadata.set(targetKey, keyMetadata = new Map());
+  } return keyMetadata;
+};
+
+var ordinaryHasOwnMetadata = function (MetadataKey, O, P) {
+  var metadataMap = getOrCreateMetadataMap(O, P, false);
+  return metadataMap === undefined ? false : metadataMap.has(MetadataKey);
+};
+
+var ordinaryGetOwnMetadata = function (MetadataKey, O, P) {
+  var metadataMap = getOrCreateMetadataMap(O, P, false);
+  return metadataMap === undefined ? undefined : metadataMap.get(MetadataKey);
+};
+
+var ordinaryDefineOwnMetadata = function (MetadataKey, MetadataValue, O, P) {
+  getOrCreateMetadataMap(O, P, true).set(MetadataKey, MetadataValue);
+};
+
+var ordinaryOwnMetadataKeys = function (target, targetKey) {
+  var metadataMap = getOrCreateMetadataMap(target, targetKey, false);
+  var keys = [];
+  if (metadataMap) metadataMap.forEach(function (_, key) { push(keys, key); });
+  return keys;
+};
+
+var toMetadataKey = function (it) {
+  return it === undefined || typeof it == 'symbol' ? it : String(it);
+};
+
+module.exports = {
+  store: store,
+  getMap: getOrCreateMetadataMap,
+  has: ordinaryHasOwnMetadata,
+  get: ordinaryGetOwnMetadata,
+  set: ordinaryDefineOwnMetadata,
+  keys: ordinaryOwnMetadataKeys,
+  toKey: toMetadataKey
+};