1 files changed, 85 insertions, 0 deletions
diff --git a/node_modules/core-js/modules/_collection.js b/node_modules/core-js/modules/_collection.js
new file mode 100644
index 00000000..767dde50
--- /dev/null
+++ b/node_modules/core-js/modules/_collection.js
@@ -0,0 +1,85 @@
+'use strict';
+var global = require('./_global');
+var $export = require('./_export');
+var redefine = require('./_redefine');
+var redefineAll = require('./_redefine-all');
+var meta = require('./_meta');
+var forOf = require('./_for-of');
+var anInstance = require('./_an-instance');
+var isObject = require('./_is-object');
+var fails = require('./_fails');
+var $iterDetect = require('./_iter-detect');
+var setToStringTag = require('./_set-to-string-tag');
+var inheritIfRequired = require('./_inherit-if-required');
+
+module.exports = function (NAME, wrapper, methods, common, IS_MAP, IS_WEAK) {
+  var Base = global[NAME];
+  var C = Base;
+  var ADDER = IS_MAP ? 'set' : 'add';
+  var proto = C && C.prototype;
+  var O = {};
+  var fixMethod = function (KEY) {
+    var fn = proto[KEY];
+    redefine(proto, KEY,
+      KEY == 'delete' ? function (a) {
+        return IS_WEAK && !isObject(a) ? false : fn.call(this, a === 0 ? 0 : a);
+      } : KEY == 'has' ? function has(a) {
+        return IS_WEAK && !isObject(a) ? false : fn.call(this, a === 0 ? 0 : a);
+      } : KEY == 'get' ? function get(a) {
+        return IS_WEAK && !isObject(a) ? undefined : fn.call(this, a === 0 ? 0 : a);
+      } : KEY == 'add' ? function add(a) { fn.call(this, a === 0 ? 0 : a); return this; }
+        : function set(a, b) { fn.call(this, a === 0 ? 0 : a, b); return this; }
+    );
+  };
+  if (typeof C != 'function' || !(IS_WEAK || proto.forEach && !fails(function () {
+    new C().entries().next();
+  }))) {
+    // create collection constructor
+    C = common.getConstructor(wrapper, NAME, IS_MAP, ADDER);
+    redefineAll(C.prototype, methods);
+    meta.NEED = true;
+  } else {
+    var instance = new C();
+    // early implementations not supports chaining
+    var HASNT_CHAINING = instance[ADDER](IS_WEAK ? {} : -0, 1) != instance;
+    // V8 ~  Chromium 40- weak-collections throws on primitives, but should return false
+    var THROWS_ON_PRIMITIVES = fails(function () { instance.has(1); });
+    // most early implementations doesn't supports iterables, most modern - not close it correctly
+    var ACCEPT_ITERABLES = $iterDetect(function (iter) { new C(iter); }); // eslint-disable-line no-new
+    // for early implementations -0 and +0 not the same
+    var BUGGY_ZERO = !IS_WEAK && fails(function () {
+      // V8 ~ Chromium 42- fails only with 5+ elements
+      var $instance = new C();
+      var index = 5;
+      while (index--) $instance[ADDER](index, index);
+      return !$instance.has(-0);
+    });
+    if (!ACCEPT_ITERABLES) {
+      C = wrapper(function (target, iterable) {
+        anInstance(target, C, NAME);
+        var that = inheritIfRequired(new Base(), target, C);
+        if (iterable != undefined) forOf(iterable, IS_MAP, that[ADDER], that);
+        return that;
+      });
+      C.prototype = proto;
+      proto.constructor = C;
+    }
+    if (THROWS_ON_PRIMITIVES || BUGGY_ZERO) {
+      fixMethod('delete');
+      fixMethod('has');
+      IS_MAP && fixMethod('get');
+    }
+    if (BUGGY_ZERO || HASNT_CHAINING) fixMethod(ADDER);
+    // weak collections should not contains .clear method
+    if (IS_WEAK && proto.clear) delete proto.clear;
+  }
+
+  setToStringTag(C, NAME);
+
+  O[NAME] = C;
+  $export($export.G + $export.W + $export.F * (C != Base), O);
+
+  if (!IS_WEAK) common.setStrong(C, NAME, IS_MAP);
+
+  return C;
+};