Fix updateArrowFunction execution order: visit => token before body

Author: Andy Hanson

src/compiler/visitor.ts

@@ -483,13 +483,13 @@ namespace ts {
                     visitFunctionBody((<FunctionExpression>node).body, visitor, context));
 
             case SyntaxKind.ArrowFunction:
-                return updateArrowFunction(<ArrowFunction>node,
-                    nodesVisitor((<ArrowFunction>node).modifiers, visitor, isModifier),
-                    nodesVisitor((<ArrowFunction>node).typeParameters, visitor, isTypeParameterDeclaration),
-                    visitParameterList((<ArrowFunction>node).parameters, visitor, context, nodesVisitor),
-                    visitNode((<ArrowFunction>node).type, visitor, isTypeNode),
-                    visitFunctionBody((<ArrowFunction>node).body, visitor, context),
-                    visitNode((<ArrowFunction>node).equalsGreaterThanToken, visitor, n => n.kind === SyntaxKind.EqualsGreaterThanToken));
+                const modifiers = nodesVisitor((<ArrowFunction>node).modifiers, visitor, isModifier);
+                const typeParameters = nodesVisitor((<ArrowFunction>node).typeParameters, visitor, isTypeParameterDeclaration);
+                const parameters = visitParameterList((<ArrowFunction>node).parameters, visitor, context, nodesVisitor);
+                const type = visitNode((<ArrowFunction>node).type, visitor, isTypeNode);
+                const arrow = visitNode((<ArrowFunction>node).equalsGreaterThanToken, visitor, n => n.kind === SyntaxKind.EqualsGreaterThanToken);
+                const body = visitFunctionBody((<ArrowFunction>node).body, visitor, context);
+                return updateArrowFunction(<ArrowFunction>node, modifiers, typeParameters, parameters, type, body, arrow);
 
             case SyntaxKind.DeleteExpression:
                 return updateDelete(<DeleteExpression>node,