Initial project import

node_modules/core-js/modules/es.iterator.map.js

@@ -0,0 +1,44 @@
+'use strict';
+var $ = require('../internals/export');
+var call = require('../internals/function-call');
+var aCallable = require('../internals/a-callable');
+var anObject = require('../internals/an-object');
+var getIteratorDirect = require('../internals/get-iterator-direct');
+var createIteratorProxy = require('../internals/iterator-create-proxy');
+var callWithSafeIterationClosing = require('../internals/call-with-safe-iteration-closing');
+var iteratorClose = require('../internals/iterator-close');
+var iteratorHelperThrowsOnInvalidIterator = require('../internals/iterator-helper-throws-on-invalid-iterator');
+var iteratorHelperWithoutClosingOnEarlyError = require('../internals/iterator-helper-without-closing-on-early-error');
+var IS_PURE = require('../internals/is-pure');
+
+var MAP_WITHOUT_THROWING_ON_INVALID_ITERATOR = !IS_PURE && !iteratorHelperThrowsOnInvalidIterator('map', function () { /* empty */ });
+var mapWithoutClosingOnEarlyError = !IS_PURE && !MAP_WITHOUT_THROWING_ON_INVALID_ITERATOR
+  && iteratorHelperWithoutClosingOnEarlyError('map', TypeError);
+
+var FORCED = IS_PURE || MAP_WITHOUT_THROWING_ON_INVALID_ITERATOR || mapWithoutClosingOnEarlyError;
+
+var IteratorProxy = createIteratorProxy(function () {
+  var iterator = this.iterator;
+  var result = anObject(call(this.next, iterator));
+  var done = this.done = !!result.done;
+  if (!done) return callWithSafeIterationClosing(iterator, this.mapper, [result.value, this.counter++], true);
+});
+
+// `Iterator.prototype.map` method
+// https://tc39.es/ecma262/#sec-iterator.prototype.map
+$({ target: 'Iterator', proto: true, real: true, forced: FORCED }, {
+  map: function map(mapper) {
+    anObject(this);
+    try {
+      aCallable(mapper);
+    } catch (error) {
+      iteratorClose(this, 'throw', error);
+    }
+
+    if (mapWithoutClosingOnEarlyError) return call(mapWithoutClosingOnEarlyError, this, mapper);
+
+    return new IteratorProxy(getIteratorDirect(this), {
+      mapper: mapper
+    });
+  }
+});