Added es5 conformance tests for async arrow functions, add error for referencing 'arguments' in a generator.

tests/cases/conformance/async/es5/asyncArrowFunction/arrowFunctionWithParameterNameAsync_es5.ts

@@ -0,0 +1,5 @@
+// @target: ES5
+// @lib: es5,es2015.promise
+// @noEmitHelpers: true
+
+const x = async => async;

tests/cases/conformance/async/es5/asyncArrowFunction/asyncArrowFunction10_es5.ts

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+// @target: ES5
+// @lib: es5,es2015.promise
+// @noEmitHelpers: true
+
+var foo = async (): Promise<void> => {
+   // Legal to use 'await' in a type context.
+   var v: await;
+}

tests/cases/conformance/async/es5/asyncArrowFunction/asyncArrowFunction1_es5.ts

@@ -0,0 +1,6 @@
+// @target: ES5
+// @lib: es5,es2015.promise
+// @noEmitHelpers: true
+
+var foo = async (): Promise<void> => {
+};

tests/cases/conformance/async/es5/asyncArrowFunction/asyncArrowFunction2_es5.ts

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+// @target: ES5
+// @lib: es5,es2015.promise
+// @noEmitHelpers: true
+var f = (await) => {
+}

tests/cases/conformance/async/es5/asyncArrowFunction/asyncArrowFunction3_es5.ts

@@ -0,0 +1,5 @@
+// @target: ES5
+// @lib: es5,es2015.promise
+// @noEmitHelpers: true
+function f(await = await) {
+}

tests/cases/conformance/async/es5/asyncArrowFunction/asyncArrowFunction4_es5.ts

@@ -0,0 +1,5 @@
+// @target: ES5
+// @lib: es5,es2015.promise
+// @noEmitHelpers: true
+var await = () => {
+}

tests/cases/conformance/async/es5/asyncArrowFunction/asyncArrowFunction5_es5.ts

@@ -0,0 +1,6 @@
+// @target: ES5
+// @lib: es5,es2015.promise
+// @noEmitHelpers: true
+
+var foo = async (await): Promise<void> => {
+}

tests/cases/conformance/async/es5/asyncArrowFunction/asyncArrowFunction6_es5.ts

@@ -0,0 +1,6 @@
+// @target: ES5
+// @lib: es5,es2015.promise
+// @noEmitHelpers: true
+
+var foo = async (a = await): Promise<void> => {
+}

tests/cases/conformance/async/es5/asyncArrowFunction/asyncArrowFunction7_es5.ts

@@ -0,0 +1,9 @@
+// @target: ES5
+// @lib: es5,es2015.promise
+// @noEmitHelpers: true
+
+var bar = async (): Promise<void> => {
+  // 'await' here is an identifier, and not an await expression.
+  var foo = async (a = await): Promise<void> => {
+  }
+}

tests/cases/conformance/async/es5/asyncArrowFunction/asyncArrowFunction8_es5.ts

@@ -0,0 +1,7 @@
+// @target: ES5
+// @lib: es5,es2015.promise
+// @noEmitHelpers: true
+
+var foo = async (): Promise<void> => {
+  var v = { [await]: foo }
+}

tests/cases/conformance/async/es5/asyncArrowFunction/asyncArrowFunction9_es5.ts

@@ -0,0 +1,5 @@
+// @target: ES5
+// @lib: es5,es2015.promise
+// @noEmitHelpers: true
+var foo = async (a = await => await): Promise<void> => {
+}

tests/cases/conformance/async/es5/asyncArrowFunction/asyncArrowFunctionCapturesArguments_es5.ts

@@ -0,0 +1,9 @@
+// @target: ES5
+// @lib: es5,es2015.promise
+// @noEmitHelpers: true
+class C {
+   method() {
+      function other() {}
+      var fn = async () => await other.apply(this, arguments);
+   }
+}

tests/cases/conformance/async/es5/asyncArrowFunction/asyncArrowFunctionCapturesThis_es5.ts

@@ -0,0 +1,8 @@
+// @target: ES5
+// @lib: es5,es2015.promise
+// @noEmitHelpers: true
+class C {
+   method() {
+      var fn = async () => await this;
+   }
+}

tests/cases/conformance/async/es5/asyncArrowFunction/asyncUnParenthesizedArrowFunction_es5.ts

@@ -0,0 +1,7 @@
+// @target: ES5
+// @lib: es5,es2015.promise
+// @noEmitHelpers: true
+
+declare function someOtherFunction(i: any): Promise<void>;
+const x = async i => await someOtherFunction(i)
+const x1 = async (i) => await someOtherFunction(i);

tests/cases/conformance/async/es5/functionDeclarations/asyncFunctionDeclarationCapturesArguments_es5.ts

@@ -0,0 +1,11 @@
+// @target: ES5
+// @lib: es5,es2015.promise
+// @noEmitHelpers: true
+class C {
+   method() {
+      function other() {}
+      async function fn () {
+           await other.apply(this, arguments);
+      }
+   }
+}