Added generator function

index.test.ts

@@ -53,4 +53,14 @@ describe( `ts-helpers`, () => {
 
   } );
 
+  describe( `__generator`, () => {
+
+    it( `should exists on global`, () => {
+
+      expect( hasOwnProperty.call( global, '__generator' ) ).to.equal( true );
+
+    } );
+
+  } );
+
 } );

index.ts

@@ -47,6 +47,34 @@ function __awaiterFn(thisArg, _arguments, P, generator) {
   });
 }
 
+function __generatorFn (thisArg, body) {
+    var _: any = { label: 0, sent: function() { if (t[0] & 1) throw t[1]; return t[1]; }, trys: [], ops: [] }, f, y, t;
+    return { next: verb(0), "throw": verb(1), "return": verb(2) };
+    function verb(n) { return function (v) { return step([n, v]); }; }
+    function step(op) {
+        if (f) throw new TypeError("Generator is already executing.");
+        while (_) try {
+            if (f = 1, y && (t = y[op[0] & 2 ? "return" : op[0] ? "throw" : "next"]) && !(t = t.call(y, op[1])).done) return t;
+            if (y = 0, t) op = [0, t.value];
+            switch (op[0]) {
+                case 0: case 1: t = op; break;
+                case 4: _.label++; return { value: op[1], done: false };
+                case 5: _.label++; y = op[1]; op = [0]; continue;
+                case 7: op = _.ops.pop(); _.trys.pop(); continue;
+                default:
+                    if (!(t = _.trys, t = t.length > 0 && t[t.length - 1]) && (op[0] === 6 || op[0] === 2)) { _ = 0; continue; }
+                    if (op[0] === 3 && (!t || (op[1] > t[0] && op[1] < t[3]))) { _.label = op[1]; break; }
+                    if (op[0] === 6 && _.label < t[1]) { _.label = t[1]; t = op; break; }
+                    if (t && _.label < t[2]) { _.label = t[2]; _.ops.push(op); break; }
+                    if (t[2]) _.ops.pop();
+                    _.trys.pop(); continue;
+            }
+            op = body.call(thisArg, _);
+        } catch (e) { op = [6, e]; y = 0; } finally { f = t = 0; }
+        if (op[0] & 5) throw op[1]; return { value: op[0] ? op[1] : void 0, done: true };
+    }
+};
+
 // hook global helpers
 (function(__global: any) {
 
@@ -56,6 +84,7 @@ function __awaiterFn(thisArg, _arguments, P, generator) {
   __global.__metadata = (__global && __global.__metadata) || __metadataFn;
   __global.__param = (__global && __global.__param) || __paramFn;
   __global.__awaiter =(__global && __global.__awaiter) || __awaiterFn;
+  __global.__generator =(__global && __global.__generator) || __generatorFn;
 
 })(
   typeof window !== "undefined" ? window :