no-unnecessary-type-annotation: detect other IIFE style

Fixes: #56

Author: ajafff

rules/noUnnecessaryTypeAnnotationRule.ts

@@ -347,13 +347,11 @@ function getMinArguments(parameters: ReadonlyArray<ts.ParameterDeclaration>): nu
 }
 
 function getIife(node: FunctionExpressionLike): ts.CallExpression | undefined {
-    if (node.parent!.kind !== ts.SyntaxKind.ParenthesizedExpression)
-        return;
-    let prev = node.parent!;
+    let prev: ts.Node = node;
     let parent = prev.parent!;
     while (parent.kind === ts.SyntaxKind.ParenthesizedExpression) {
         prev = parent;
-        parent = parent.parent!;
+        parent = prev.parent!;
     }
     if (parent.kind === ts.SyntaxKind.CallExpression && (<ts.CallExpression>parent).expression === prev)
         return <ts.CallExpression>parent;

test/rules/no-unnecessary-type-annotation/default/test.ts.lint

@@ -57,6 +57,8 @@ take<((a: string) => string) | ((a: string) => number)>((a: string): string => a
 (function(foo: "foo") {})("foo");
 (function(foo: string) {})("foo");
              ~~~~~~~~ [fail]
+(function(foo: string) {}("foo"));
+             ~~~~~~~~ [fail]
 (function(foo): void {})("foo");
 (function(foo?): void {})("foo");
 (function(param: string, ...foo: string[]) {})("foo", "bar", "baz");