Add visitor with additional argument for Statement nodes

pkg/kernel/lib/visitor.dart

 // Copyright (c) 2016, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 library kernel.ast.visitor;
 
 import 'ast.dart';
 
 abstract class ExpressionVisitor<R> {
   R defaultExpression(Expression node) => null;
   R defaultBasicLiteral(BasicLiteral node) => defaultExpression(node);
@@ skipping 363 matching lines @@
   R visitIntLiteral(IntLiteral node, arg) => defaultBasicLiteral(node, arg);
   R visitDoubleLiteral(DoubleLiteral node, arg) =>
       defaultBasicLiteral(node, arg);
   R visitBoolLiteral(BoolLiteral node, arg) => defaultBasicLiteral(node, arg);
   R visitNullLiteral(NullLiteral node, arg) => defaultBasicLiteral(node, arg);
   R visitLet(Let node, arg) => defaultExpression(node, arg);
   R visitLoadLibrary(LoadLibrary node, arg) => defaultExpression(node, arg);
   R visitCheckLibraryIsLoaded(CheckLibraryIsLoaded node, arg) =>
       defaultExpression(node, arg);
 }
+
+abstract class StatementVisitor1<R> {
+  R defaultStatement(Statement node, arg) => null;
+
+  R visitInvalidStatement(InvalidStatement node, arg) =>
+      defaultStatement(node, arg);
+  R visitExpressionStatement(ExpressionStatement node, arg) =>
+      defaultStatement(node, arg);
+  R visitBlock(Block node, arg) => defaultStatement(node, arg);
+  R visitEmptyStatement(EmptyStatement node, arg) =>
+      defaultStatement(node, arg);
+  R visitAssertStatement(AssertStatement node, arg) =>
+      defaultStatement(node, arg);
+  R visitLabeledStatement(LabeledStatement node, arg) =>
+      defaultStatement(node, arg);
+  R visitBreakStatement(BreakStatement node, arg) =>
+      defaultStatement(node, arg);
+  R visitWhileStatement(WhileStatement node, arg) =>
+      defaultStatement(node, arg);
+  R visitDoStatement(DoStatement node, arg) => defaultStatement(node, arg);
+  R visitForStatement(ForStatement node, arg) => defaultStatement(node, arg);
+  R visitForInStatement(ForInStatement node, arg) =>
+      defaultStatement(node, arg);
+  R visitSwitchStatement(SwitchStatement node, arg) =>
+      defaultStatement(node, arg);
+  R visitContinueSwitchStatement(ContinueSwitchStatement node, arg) =>
+      defaultStatement(node, arg);
+  R visitIfStatement(IfStatement node, arg) => defaultStatement(node, arg);
+  R visitReturnStatement(ReturnStatement node, arg) =>
+      defaultStatement(node, arg);
+  R visitTryCatch(TryCatch node, arg) => defaultStatement(node, arg);
+  R visitTryFinally(TryFinally node, arg) => defaultStatement(node, arg);
+  R visitYieldStatement(YieldStatement node, arg) =>
+      defaultStatement(node, arg);
+  R visitVariableDeclaration(VariableDeclaration node, arg) =>
+      defaultStatement(node, arg);
+  R visitFunctionDeclaration(FunctionDeclaration node, arg) =>
+      defaultStatement(node, arg);
+}