1 files changed, 52 insertions, 0 deletions
diff --git a/node_modules/core-js/modules/esnext.iterator.flat-map.js b/node_modules/core-js/modules/esnext.iterator.flat-map.js
new file mode 100644
index 0000000..38ffb3f
--- /dev/null
+++ b/node_modules/core-js/modules/esnext.iterator.flat-map.js
@@ -0,0 +1,52 @@
+'use strict';
+// https://github.com/tc39/proposal-iterator-helpers
+var $ = require('../internals/export');
+var aFunction = require('../internals/a-function');
+var anObject = require('../internals/an-object');
+var getIteratorMethod = require('../internals/get-iterator-method');
+var createIteratorProxy = require('../internals/iterator-create-proxy');
+var iteratorClose = require('../internals/iterator-close');
+
+var IteratorProxy = createIteratorProxy(function (arg) {
+  var iterator = this.iterator;
+  var mapper = this.mapper;
+  var result, mapped, iteratorMethod, innerIterator;
+
+  while (true) {
+    try {
+      if (innerIterator = this.innerIterator) {
+        result = anObject(this.innerNext.call(innerIterator));
+        if (!result.done) return result.value;
+        this.innerIterator = this.innerNext = null;
+      }
+
+      result = anObject(this.next.call(iterator, arg));
+
+      if (this.done = !!result.done) return;
+
+      mapped = mapper(result.value);
+      iteratorMethod = getIteratorMethod(mapped);
+
+      if (iteratorMethod === undefined) {
+        throw TypeError('.flatMap callback should return an iterable object');
+      }
+
+      this.innerIterator = innerIterator = anObject(iteratorMethod.call(mapped));
+      this.innerNext = aFunction(innerIterator.next);
+    } catch (error) {
+      iteratorClose(iterator);
+      throw error;
+    }
+  }
+});
+
+$({ target: 'Iterator', proto: true, real: true }, {
+  flatMap: function flatMap(mapper) {
+    return new IteratorProxy({
+      iterator: anObject(this),
+      mapper: aFunction(mapper),
+      innerIterator: null,
+      innerNext: null
+    });
+  }
+});