Rewriting Project

1 files changed, 43 insertions, 0 deletions

diff --git a/node_modules/core-js/internals/composite-key.js b/node_modules/core-js/internals/composite-key.js
new file mode 100644
index 0000000..68a38c9
--- /dev/null
+++ b/node_modules/core-js/internals/composite-key.js
@@ -0,0 +1,43 @@
+// TODO: in core-js@4, move /modules/ dependencies to public entries for better optimization by tools like `preset-env`
+var Map = require('../modules/es.map');
+var WeakMap = require('../modules/es.weak-map');
+var create = require('../internals/object-create');
+var isObject = require('../internals/is-object');
+
+var Node = function () {
+  // keys
+  this.object = null;
+  this.symbol = null;
+  // child nodes
+  this.primitives = null;
+  this.objectsByIndex = create(null);
+};
+
+Node.prototype.get = function (key, initializer) {
+  return this[key] || (this[key] = initializer());
+};
+
+Node.prototype.next = function (i, it, IS_OBJECT) {
+  var store = IS_OBJECT
+    ? this.objectsByIndex[i] || (this.objectsByIndex[i] = new WeakMap())
+    : this.primitives || (this.primitives = new Map());
+  var entry = store.get(it);
+  if (!entry) store.set(it, entry = new Node());
+  return entry;
+};
+
+var root = new Node();
+
+module.exports = function () {
+  var active = root;
+  var length = arguments.length;
+  var i, it;
+  // for prevent leaking, start from objects
+  for (i = 0; i < length; i++) {
+    if (isObject(it = arguments[i])) active = active.next(i, it, true);
+  }
+  if (this === Object && active === root) throw TypeError('Composite keys must contain a non-primitive component');
+  for (i = 0; i < length; i++) {
+    if (!isObject(it = arguments[i])) active = active.next(i, it, false);
+  } return active;
+};