Add SemanticVisitor to dart2js.

pkg/compiler/lib/src/resolution/semantic_visitor_mixins.dart

+// Copyright (c) 2015, 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.
+
+part of dart2js.semantics_visitor;
+
+/// Mixin that implements all `errorX` methods of [SemanticSendVisitor] by
+/// delegating to a bulk handler.
+///
+/// Use this mixin to provide a trivial implementation for all `errorX` methods.
+abstract class ErrorBulkMixin<R, A> implements SemanticSendVisitor<R, A> {
+  R bulkHandleNode(Node node, String message);
+
+  R bulkHandleError(Send node) {
+    return bulkHandleNode(node, "Error expression `$node` unhandled.");
+  }
+
+  @override
+  R errorInvalidAssert(Send node, NodeList arguments, A arg) {
+    bulkHandleError(node);
+  }
+
+  @override
+  R errorClassTypeLiteralSet(
+      SendSet node,
+      TypeConstantExpression constant,
+      Node rhs,
+      A arg) {
+    return bulkHandleError(node);
+  }
+
+  @override
+  R errorDynamicTypeLiteralSet(
+      SendSet node, TypeConstantExpression constant, Node rhs, A arg) {
+    return bulkHandleError(node);
+  }
+
+  @override
+  R errorFinalLocalVariableCompound(
+      Send node, LocalVariableElement variable, AssignmentOperator operator, Node rhs, A arg) {

[Johnni Winther, 2015/03/04 11:59:39]

Will cleanup long lines while you review.

[Johnni Winther, 2015/03/11 09:14:47]

Done.

+    return bulkHandleError(node);
+  }
+
+  @override
+  R errorFinalLocalVariableSet(
+      SendSet node, LocalVariableElement variable, Node rhs, A arg) {
+    return bulkHandleError(node);
+  }
+
+  @override
+  R errorFinalParameterCompound(
+      Send node, ParameterElement parameter, AssignmentOperator operator, Node rhs, A arg) {
+    return bulkHandleError(node);
+  }
+
+  @override
+  R errorFinalParameterSet(
+      SendSet node, ParameterElement parameter, Node rhs, A arg) {
+    return bulkHandleError(node);
+  }
+
+  @override
+  R errorFinalStaticFieldCompound(
+      Send node, FieldElement field, AssignmentOperator operator, Node rhs, A arg) {
+    return bulkHandleError(node);
+  }
+
+  @override
+  R errorFinalStaticFieldSet(
+      SendSet node, FieldElement field, Node rhs, A arg) {
+    return bulkHandleError(node);
+  }
+
+  @override
+  R errorFinalSuperFieldCompound(
+      Send node, FieldElement field, AssignmentOperator operator, Node rhs, A arg) {
+    return bulkHandleError(node);
+  }
+
+  @override
+  R errorFinalSuperFieldSet(
+      SendSet node, FieldElement field, Node rhs, A arg) {
+    return bulkHandleError(node);
+  }
+
+  @override
+  R errorFinalTopLevelFieldCompound(
+      Send node, FieldElement field, AssignmentOperator operator, Node rhs, A arg) {
+    return bulkHandleError(node);
+  }
+
+  @override
+  R errorFinalTopLevelFieldSet(
+      SendSet node, FieldElement field, Node rhs, A arg) {
+    return bulkHandleError(node);
+  }
+
+  @override
+  R errorLocalFunctionCompound(Send node, LocalFunctionElement function, AssignmentOperator operator, Node rhs, A arg) {
+    return bulkHandleError(node);
+  }
+
+  @override
+  R errorLocalFunctionPostfix(Send node, LocalFunctionElement function, IncDecOperator operator, A arg) {
+    return bulkHandleError(node);
+  }
+
+  @override
+  R errorLocalFunctionPrefix(Send node, LocalFunctionElement function, IncDecOperator operator, A arg) {
+    return bulkHandleError(node);
+  }
+
+  @override
+  R errorLocalFunctionSet(SendSet node, LocalFunctionElement function, Node rhs, A arg) {
+    return bulkHandleError(node);
+  }
+
+  @override
+  R errorStaticFunctionSet(Send node, MethodElement function, Node rhs, A arg) {
+    return bulkHandleError(node);
+  }
+
+  @override
+  R errorStaticGetterSet(SendSet node, FunctionElement getter, Node rhs, A arg) {
+    return bulkHandleError(node);
+  }
+
+  @override
+  R errorStaticSetterGet(Send node, FunctionElement setter, A arg) {
+    return bulkHandleError(node);
+  }
+
+  @override
+  R errorStaticSetterInvoke(Send node, FunctionElement setter, NodeList arguments, Selector selector, A arg) {
+    return bulkHandleError(node);
+  }
+
+  @override
+  R errorSuperGetterSet(SendSet node, FunctionElement getter, Node rhs, A arg) {
+    return bulkHandleError(node);
+  }
+
+  @override
+  R errorSuperMethodSet(Send node, MethodElement method, Node rhs, A arg) {
+    return bulkHandleError(node);
+  }
+
+  @override
+  R errorSuperSetterGet(Send node, FunctionElement setter, A arg) {
+    return bulkHandleError(node);
+  }
+
+  @override
+  R errorSuperSetterInvoke(Send node, FunctionElement setter, NodeList arguments, Selector selector, A arg) {
+    return bulkHandleError(node);
+  }
+
+  @override
+  R errorTopLevelFunctionSet(Send node, MethodElement function, Node rhs, A arg) {
+    return bulkHandleError(node);
+  }
+
+  @override
+  R errorTopLevelGetterSet(SendSet node, FunctionElement getter, Node rhs, A arg) {
+    return bulkHandleError(node);
+  }
+
+  @override
+  R errorTopLevelSetterGet(Send node, FunctionElement setter, A arg) {
+    return bulkHandleError(node);
+  }
+
+  @override
+  R errorTopLevelSetterInvoke(Send node, FunctionElement setter, NodeList arguments, Selector selector, A arg) {
+    return bulkHandleError(node);
+  }
+
+  @override
+  R errorTypeVariableTypeLiteralSet(SendSet node, TypeVariableElement element, Node rhs, A arg) {
+    return bulkHandleError(node);
+  }
+
+  @override
+  R errorTypedefTypeLiteralSet(SendSet node, TypeConstantExpression constant, Node rhs, A arg) {
+    return bulkHandleError(node);
+  }
+
+  @override
+  R errorUnresolvedCompound(Send node, Element element, AssignmentOperator operator, Node rhs, A arg) {
+    return bulkHandleError(node);
+  }
+
+  @override
+  R errorUnresolvedGet(Send node, Element element, A arg) {
+    return bulkHandleError(node);
+  }
+
+  @override
+  R errorUnresolvedInvoke(Send node, Element element, NodeList arguments, Selector selector, A arg) {
+    return bulkHandleError(node);
+  }
+
+  @override
+  R errorUnresolvedPostfix(Send node, Element element, IncDecOperator operator, A arg) {
+    return bulkHandleError(node);
+  }
+
+  @override
+  R errorUnresolvedPrefix(Send node, Element element, IncDecOperator operator, A arg) {
+    return bulkHandleError(node);
+  }
+
+  @override
+  R errorUnresolvedSet(Send node, Element element, Node rhs, A arg) {
+    return bulkHandleError(node);
+  }
+
+  @override
+  R errorUnresolvedSuperCompoundIndexSet(Send node, Element element, Node index, AssignmentOperator operator, Node rhs, A arg) {
+    return bulkHandleError(node);
+  }
+
+  @override
+  R errorUnresolvedSuperIndexSet(Send node, Element element, Node index, Node rhs, A arg) {
+    return bulkHandleError(node);
+  }
+
+  @override
+  R errorUnresolvedSuperBinary(Send node, Element element, BinaryOperator operator, Node argument, A arg) {
+    return bulkHandleError(node);
+  }
+
+  @override
+  R errorUnresolvedSuperUnary(Send node, UnaryOperator operator, Element element, A arg) {
+    return bulkHandleError(node);
+  }
+
+  @override
+  R errorUndefinedBinaryExpression(Send node, Node left, Operator operator, Node right, A arg) {
+    return bulkHandleError(node);
+  }
+
+  @override
+  R errorUndefinedUnaryExpression(Send node, Operator operator, Node expression, A arg) {
+    return bulkHandleError(node);
+  }
+}
+
+/// Mixin that implements all `visitXPrefix` methods of [SemanticSendVisitor] by
+/// delegating to a bulk handler.
+///
+/// Use this mixin to provide a trivial implementation for all `visitXPrefix`
+/// methods.
+abstract class PrefixBulkMixin<R, A> implements SemanticSendVisitor<R, A> {
+  R bulkHandleNode(Node node, String message);
+
+  R bulkHandlePrefix(Send node) {
+    return bulkHandleNode(node, "Prefix expression `$node` unhandled.");
+  }
+
+  @override
+  R visitClassTypeLiteralPrefix(Send node, TypeConstantExpression constant, IncDecOperator operator, A arg) {
+    return bulkHandlePrefix(node);
+  }
+
+  @override
+  R visitDynamicPropertyPrefix(Send node, Node receiver, IncDecOperator operator, Selector getterSelector, Selector setterSelector, A arg) {
+    return bulkHandlePrefix(node);
+  }
+
+  @override
+  R visitDynamicTypeLiteralPrefix(Send node, TypeConstantExpression constant, IncDecOperator operator, A arg) {
+    return bulkHandlePrefix(node);
+  }
+
+  @override
+  R visitLocalVariablePrefix(Send node, LocalVariableElement variable, IncDecOperator operator, A arg) {
+    return bulkHandlePrefix(node);
+  }
+
+  @override
+  R visitParameterPrefix(Send node, ParameterElement parameter, IncDecOperator operator, A arg) {
+    return bulkHandlePrefix(node);
+  }
+
+  @override
+  R visitStaticFieldPrefix(Send node, FieldElement field, IncDecOperator operator, A arg) {
+    return bulkHandlePrefix(node);
+  }
+
+  @override
+  R visitStaticGetterSetterPrefix(Send node, FunctionElement getter, FunctionElement setter, IncDecOperator operator, A arg) {
+    return bulkHandlePrefix(node);
+  }
+
+  @override
+  R visitStaticMethodSetterPrefix(Send node, FunctionElement getter, FunctionElement setter, IncDecOperator operator, A arg) {
+    return bulkHandlePrefix(node);
+  }
+
+  @override
+  R visitSuperFieldFieldPrefix(Send node, FieldElement readField, FieldElement writtenField, IncDecOperator operator, A arg) {
+    return bulkHandlePrefix(node);
+  }
+
+  @override
+  R visitSuperFieldPrefix(Send node, FieldElement field, IncDecOperator operator, A arg) {
+    return bulkHandlePrefix(node);
+  }
+
+  @override
+  R visitSuperFieldSetterPrefix(Send node, FieldElement field, FunctionElement setter, IncDecOperator operator, A arg) {
+    return bulkHandlePrefix(node);
+  }
+
+  @override
+  R visitSuperGetterFieldPrefix(Send node, FunctionElement getter, FieldElement field, IncDecOperator operator, A arg) {
+    return bulkHandlePrefix(node);
+  }
+
+  @override
+  R visitSuperGetterSetterPrefix(Send node, FunctionElement getter, FunctionElement setter, IncDecOperator operator, A arg) {
+    return bulkHandlePrefix(node);
+  }
+
+  @override
+  R visitSuperMethodSetterPrefix(Send node, FunctionElement method, FunctionElement setter, IncDecOperator operator, A arg) {
+    return bulkHandlePrefix(node);
+  }
+
+  @override
+  R visitThisPropertyPrefix(Send node, IncDecOperator operator, Selector getterSelector, Selector setterSelector, A arg) {
+    return bulkHandlePrefix(node);
+  }
+
+  @override
+  R visitTopLevelFieldPrefix(Send node, FieldElement field, IncDecOperator operator, A arg) {
+    return bulkHandlePrefix(node);
+  }
+
+  @override
+  R visitTopLevelGetterSetterPrefix(Send node, FunctionElement getter, FunctionElement setter, IncDecOperator operator, A arg) {
+    return bulkHandlePrefix(node);
+  }
+
+  @override
+  R visitTopLevelMethodSetterPrefix(Send node, FunctionElement method, FunctionElement setter, IncDecOperator operator, A arg) {
+    return bulkHandlePrefix(node);
+  }
+
+  @override
+  R visitTypeVariableTypeLiteralPrefix(Send node, TypeVariableElement element, IncDecOperator operator, A arg) {
+    return bulkHandlePrefix(node);
+  }
+
+  @override
+  R visitTypedefTypeLiteralPrefix(Send node, TypeConstantExpression constant, IncDecOperator operator, A arg) {
+    return bulkHandlePrefix(node);
+  }
+}
+
+/// Mixin that implements all `visitXPostfix` methods of [SemanticSendVisitor]
+/// by delegating to a bulk handler.
+///
+/// Use this mixin to provide a trivial implementation for all `visitXPostfix`
+/// methods.
+abstract class PostfixBulkMixin<R, A> implements SemanticSendVisitor<R, A> {
+  R bulkHandleNode(Node node, String message);
+
+  R bulkHandlePostfix(Send node) {
+    return bulkHandleNode(node, "Postfix expression `$node` unhandled.");
+  }
+
+  @override
+  R visitClassTypeLiteralPostfix(Send node, TypeConstantExpression constant,
+                                 IncDecOperator operator, A arg) {
+    return bulkHandlePostfix(node);
+  }
+
+  @override
+  R visitDynamicPropertyPostfix(Send node, Node receiver,
+                                IncDecOperator operator,
+                                Selector getterSelector,
+                                Selector setterSelector, A arg) {
+    return bulkHandlePostfix(node);
+  }
+
+  @override
+  R visitDynamicTypeLiteralPostfix(Send node,
+                                   TypeConstantExpression constant,
+                                   IncDecOperator operator, A arg) {
+    return bulkHandlePostfix(node);
+  }
+
+  @override
+  R visitLocalVariablePostfix(Send node, LocalVariableElement variable, IncDecOperator operator, A arg) {
+    return bulkHandlePostfix(node);
+  }
+
+  @override
+  R visitParameterPostfix(Send node, ParameterElement parameter, IncDecOperator operator, A arg) {
+    return bulkHandlePostfix(node);
+  }
+
+  @override
+  R visitStaticFieldPostfix(Send node, FieldElement field, IncDecOperator operator, A arg) {
+    return bulkHandlePostfix(node);
+  }
+
+  @override
+  R visitStaticGetterSetterPostfix(Send node, FunctionElement getter, FunctionElement setter, IncDecOperator operator, A arg) {
+    return bulkHandlePostfix(node);
+  }
+
+  @override
+  R visitStaticMethodSetterPostfix(Send node, FunctionElement getter, FunctionElement setter, IncDecOperator operator, A arg) {
+    return bulkHandlePostfix(node);
+  }
+
+  @override
+  R visitSuperFieldFieldPostfix(Send node, FieldElement readField, FieldElement writtenField, IncDecOperator operator, A arg) {
+    return bulkHandlePostfix(node);
+  }
+
+  @override
+  R visitSuperFieldPostfix(Send node, FieldElement field, IncDecOperator operator, A arg) {
+    return bulkHandlePostfix(node);
+  }
+
+  @override
+  R visitSuperFieldSetterPostfix(Send node, FieldElement field, FunctionElement setter, IncDecOperator operator, A arg) {
+    return bulkHandlePostfix(node);
+  }
+
+  @override
+  R visitSuperGetterFieldPostfix(Send node, FunctionElement getter, FieldElement field, IncDecOperator operator, A arg) {
+    return bulkHandlePostfix(node);
+  }
+
+  @override
+  R visitSuperGetterSetterPostfix(Send node, FunctionElement getter, FunctionElement setter, IncDecOperator operator, A arg) {
+    return bulkHandlePostfix(node);
+  }
+
+  @override
+  R visitSuperMethodSetterPostfix(Send node, FunctionElement method, FunctionElement setter, IncDecOperator operator, A arg) {
+    return bulkHandlePostfix(node);
+  }
+
+  @override
+  R visitThisPropertyPostfix(Send node, IncDecOperator operator, Selector getterSelector, Selector setterSelector, A arg) {
+    return bulkHandlePostfix(node);
+  }
+
+  @override
+  R visitTopLevelFieldPostfix(Send node, FieldElement field, IncDecOperator operator, A arg) {
+    return bulkHandlePostfix(node);
+  }
+
+  @override
+  R visitTopLevelGetterSetterPostfix(Send node, FunctionElement getter, FunctionElement setter, IncDecOperator operator, A arg) {
+    return bulkHandlePostfix(node);
+  }
+
+  @override
+  R visitTopLevelMethodSetterPostfix(Send node, FunctionElement method, FunctionElement setter, IncDecOperator operator, A arg) {
+    return bulkHandlePostfix(node);
+  }
+
+  @override
+  R visitTypeVariableTypeLiteralPostfix(Send node, TypeVariableElement element, IncDecOperator operator, A arg) {
+    return bulkHandlePostfix(node);
+  }
+
+  @override
+  R visitTypedefTypeLiteralPostfix(Send node, TypeConstantExpression constant, IncDecOperator operator, A arg) {
+    return bulkHandlePostfix(node);
+  }
+}
+
+/// Mixin that implements all `visitXCompound` methods of [SemanticSendVisitor]
+/// by delegating to a bulk handler.
+///
+/// Use this mixin to provide a trivial implementation for all `xCompound`
+/// methods.
+abstract class CompoundBulkMixin<R, A> implements SemanticSendVisitor<R, A> {
+  R bulkHandleNode(Node node, String message);
+
+  R bulkHandleCompound(Send node) {
+    return bulkHandleNode(node, "Compound assignment `$node` unhandled.");
+  }
+
+  @override
+  R visitClassTypeLiteralCompound(Send node, TypeConstantExpression constant, AssignmentOperator operator, Node rhs, A arg) {
+    return bulkHandleCompound(node);
+  }
+
+  @override
+  R visitDynamicPropertyCompound(Send node, Node receiver, AssignmentOperator operator, Node rhs, Selector getterSelector, Selector setterSelector, A arg) {
+    return bulkHandleCompound(node);
+  }
+
+  @override
+  R visitDynamicTypeLiteralCompound(Send node, TypeConstantExpression constant, AssignmentOperator operator, Node rhs, A arg) {
+    return bulkHandleCompound(node);
+  }
+
+  @override
+  R visitLocalVariableCompound(Send node, LocalVariableElement variable, AssignmentOperator operator, Node rhs, A arg) {
+    return bulkHandleCompound(node);
+  }
+
+  @override
+  R visitParameterCompound(Send node, ParameterElement parameter, AssignmentOperator operator, Node rhs, A arg) {
+    return bulkHandleCompound(node);
+  }
+
+  @override
+  R visitStaticFieldCompound(Send node, FieldElement field, AssignmentOperator operator, Node rhs, A arg) {
+    return bulkHandleCompound(node);
+  }
+
+  @override
+  R visitStaticGetterSetterCompound(Send node, FunctionElement getter, FunctionElement setter, AssignmentOperator operator, Node rhs, A arg) {
+    return bulkHandleCompound(node);
+  }
+
+  @override
+  R visitStaticMethodSetterCompound(Send node, FunctionElement method, FunctionElement setter, AssignmentOperator operator, Node rhs, A arg) {
+    return bulkHandleCompound(node);
+  }
+
+  @override
+  R visitSuperFieldCompound(Send node, FieldElement field, AssignmentOperator operator, Node rhs, A arg) {
+    return bulkHandleCompound(node);
+  }
+
+  @override
+  R visitSuperFieldSetterCompound(Send node, FieldElement field, FunctionElement setter, AssignmentOperator operator, Node rhs, A arg) {
+    return bulkHandleCompound(node);
+  }
+
+  @override
+  R visitSuperGetterFieldCompound(Send node, FunctionElement getter, FieldElement field, AssignmentOperator operator, Node rhs, A arg) {
+    return bulkHandleCompound(node);
+  }
+
+  @override
+  R visitSuperGetterSetterCompound(Send node, FunctionElement getter, FunctionElement setter, AssignmentOperator operator, Node rhs, A arg) {
+    return bulkHandleCompound(node);
+  }
+
+  @override
+  R visitSuperMethodSetterCompound(Send node, FunctionElement method, FunctionElement setter, AssignmentOperator operator, Node rhs, A arg) {
+    return bulkHandleCompound(node);
+  }
+
+  @override
+  R visitThisPropertyCompound(Send node, AssignmentOperator operator, Node rhs, Selector getterSelector, Selector setterSelector, A arg) {
+    return bulkHandleCompound(node);
+  }
+
+  @override
+  R visitTopLevelFieldCompound(Send node, FieldElement field, AssignmentOperator operator, Node rhs, A arg) {
+    return bulkHandleCompound(node);
+  }
+
+  @override
+  R visitTopLevelGetterSetterCompound(Send node, FunctionElement getter, FunctionElement setter, AssignmentOperator operator, Node rhs, A arg) {
+    return bulkHandleCompound(node);
+  }
+
+  @override
+  R visitTopLevelMethodSetterCompound(Send node, FunctionElement method, FunctionElement setter, AssignmentOperator operator, Node rhs, A arg) {
+    return bulkHandleCompound(node);
+  }
+
+  @override
+  R visitTypeVariableTypeLiteralCompound(Send node, TypeVariableElement element, AssignmentOperator operator, Node rhs, A arg) {
+    return bulkHandleCompound(node);
+  }
+
+  @override
+  R visitTypedefTypeLiteralCompound(Send node, TypeConstantExpression constant, AssignmentOperator operator, Node rhs, A arg) {
+    return bulkHandleCompound(node);
+  }
+}
+
+/// Mixin that implements all `visitXInvoke` methods of [SemanticSendVisitor] by
+/// delegating to a bulk handler.
+///
+/// Use this mixin to provide a trivial implementation for all `visitXInvoke`
+/// methods.
+abstract class InvokeBulkMixin<R, A> implements SemanticSendVisitor<R, A> {
+  R bulkHandleNode(Node node, String message);
+
+  R bulkHandleInvoke(Send node) {
+    return bulkHandleNode(node, "Invocation `$node` unhandled.");
+  }
+
+  @override
+  R visitClassTypeLiteralInvoke(Send node, TypeConstantExpression constant, NodeList arguments, Selector selector, A arg) {
+    return bulkHandleInvoke(node);
+  }
+
+  @override
+  R visitDynamicPropertyInvoke(Send node, Node receiver, NodeList arguments, Selector selector, A arg) {
+    return bulkHandleInvoke(node);
+  }
+
+  @override
+  R visitDynamicTypeLiteralInvoke(Send node, TypeConstantExpression constant, NodeList arguments, Selector selector, A arg) {
+    return bulkHandleInvoke(node);
+  }
+
+  @override
+  R visitExpressionInvoke(Send node, Node expression, NodeList arguments, Selector selector, A arg) {
+    return bulkHandleInvoke(node);
+  }
+
+  @override
+  R visitLocalFunctionInvoke(Send node, LocalFunctionElement function, NodeList arguments, Selector selector, A arg) {
+    return bulkHandleInvoke(node);
+  }
+
+  @override
+  R visitLocalVariableInvoke(Send node, LocalVariableElement variable, NodeList arguments, Selector selector, A arg) {
+    return bulkHandleInvoke(node);
+  }
+
+  @override
+  R visitParameterInvoke(Send node, ParameterElement parameter, NodeList arguments, Selector selector, A arg) {
+    return bulkHandleInvoke(node);
+  }
+
+  @override
+  R visitStaticFieldInvoke(Send node, FieldElement field, NodeList arguments, Selector selector, A arg) {
+    return bulkHandleInvoke(node);
+  }
+
+  @override
+  R visitStaticFunctionInvoke(Send node, MethodElement function, NodeList arguments, Selector selector, A arg) {
+    return bulkHandleInvoke(node);
+  }
+
+  @override
+  R visitStaticGetterInvoke(Send node, FunctionElement getter, NodeList arguments, Selector selector, A arg) {
+    return bulkHandleInvoke(node);
+  }
+
+  @override
+  R visitSuperFieldInvoke(Send node, FieldElement field, NodeList arguments, Selector selector, A arg) {
+    return bulkHandleInvoke(node);
+  }
+
+  @override
+  R visitSuperGetterInvoke(Send node, FunctionElement getter, NodeList arguments, Selector selector, A arg) {
+    return bulkHandleInvoke(node);
+  }
+
+  @override
+  R visitSuperMethodInvoke(Send node, MethodElement method, NodeList arguments, Selector selector, A arg) {
+    return bulkHandleInvoke(node);
+  }
+
+  @override
+  R visitThisInvoke(Send node, NodeList arguments, Selector selector, A arg) {
+    return bulkHandleInvoke(node);
+  }
+
+  @override
+  R visitThisPropertyInvoke(Send node, NodeList arguments, Selector selector, A arg) {
+    return bulkHandleInvoke(node);
+  }
+
+  @override
+  R visitTopLevelFieldInvoke(Send node, FieldElement field, NodeList arguments, Selector selector, A arg) {
+    return bulkHandleInvoke(node);
+  }
+
+  @override
+  R visitTopLevelFunctionInvoke(Send node, MethodElement function, NodeList arguments, Selector selector, A arg) {
+    return bulkHandleInvoke(node);
+  }
+
+  @override
+  R visitTopLevelGetterInvoke(Send node, FunctionElement getter, NodeList arguments, Selector selector, A arg) {
+    return bulkHandleInvoke(node);
+  }
+
+  @override
+  R visitTypeVariableTypeLiteralInvoke(Send node, TypeVariableElement element, NodeList arguments, Selector selector, A arg) {
+    return bulkHandleInvoke(node);
+  }
+
+  @override
+  R visitTypedefTypeLiteralInvoke(Send node, TypeConstantExpression constant, NodeList arguments, Selector selector, A arg) {
+    return bulkHandleInvoke(node);
+  }
+
+  @override
+  R visitConstantInvoke(
+      Send node,
+      ConstantExpression constant,
+      NodeList arguments,
+      Selector selector,
+      A arg) {
+    return bulkHandleInvoke(node);
+  }
+}
+
+/// Mixin that implements all `visitXGet` methods of [SemanticSendVisitor] by
+/// delegating to a bulk handler.
+///
+/// Use this mixin to provide a trivial implementation for all `visitXGet`
+/// methods.
+abstract class GetBulkMixin<R, A> implements SemanticSendVisitor<R, A> {
+  R bulkHandleNode(Node node, String message);
+
+  R bulkHandleGet(Node node) {
+    return bulkHandleNode(node, "Read `$node` unhandled.");
+  }
+
+  @override
+  R visitClassTypeLiteralGet(Send node, TypeConstantExpression constant, A arg) {
+    return bulkHandleGet(node);
+  }
+
+  @override
+  R visitDynamicPropertyGet(Send node, Node receiver, Selector selector, A arg) {
+    return bulkHandleGet(node);
+  }
+
+  @override
+  R visitDynamicTypeLiteralGet(Send node, TypeConstantExpression constant, A arg) {
+    return bulkHandleGet(node);
+  }
+
+  @override
+  R visitLocalFunctionGet(Send node, LocalFunctionElement function, A arg) {
+    return bulkHandleGet(node);
+  }
+
+  @override
+  R visitLocalVariableGet(Send node, LocalVariableElement variable, A arg) {
+    return bulkHandleGet(node);
+  }
+
+  @override
+  R visitParameterGet(Send node, ParameterElement parameter, A arg) {
+    return bulkHandleGet(node);
+  }
+
+  @override
+  R visitStaticFieldGet(Send node, FieldElement field, A arg) {
+    return bulkHandleGet(node);
+  }
+
+  @override
+  R visitStaticFunctionGet(Send node, MethodElement function, A arg) {
+    return bulkHandleGet(node);
+  }
+
+  @override
+  R visitStaticGetterGet(Send node, FunctionElement getter, A arg) {
+    return bulkHandleGet(node);
+  }
+
+  @override
+  R visitSuperFieldGet(Send node, FieldElement field, A arg) {
+    return bulkHandleGet(node);
+  }
+
+  @override
+  R visitSuperGetterGet(Send node, FunctionElement getter, A arg) {
+    return bulkHandleGet(node);
+  }
+
+  @override
+  R visitSuperMethodGet(Send node, MethodElement method, A arg) {
+    return bulkHandleGet(node);
+  }
+
+  @override
+  R visitThisGet(Identifier node, A arg) {
+    return bulkHandleGet(node);
+  }
+
+  @override
+  R visitThisPropertyGet(Send node, Selector selector, A arg) {
+    return bulkHandleGet(node);
+  }
+
+  @override
+  R visitTopLevelFieldGet(Send node, FieldElement field, A arg) {
+    return bulkHandleGet(node);
+  }
+
+  @override
+  R visitTopLevelFunctionGet(Send node, MethodElement function, A arg) {
+    return bulkHandleGet(node);
+  }
+
+  @override
+  R visitTopLevelGetterGet(Send node, FunctionElement getter, A arg) {
+    return bulkHandleGet(node);
+  }
+
+  @override
+  R visitTypeVariableTypeLiteralGet(Send node, TypeVariableElement element, A arg) {
+    return bulkHandleGet(node);
+  }
+
+  @override
+  R visitTypedefTypeLiteralGet(Send node, TypeConstantExpression constant, A arg) {
+    return bulkHandleGet(node);
+  }
+
+  @override
+  R visitConstantGet(
+      Send node,
+      TypeConstantExpression constant,
+      A arg) {
+    return bulkHandleGet(node);
+  }
+}
+
+/// Mixin that implements all `visitXSet` methods of [SemanticSendVisitor] by
+/// delegating to a bulk handler.
+///
+/// Use this mixin to provide a trivial implementation for all `visitXSet`
+/// methods.
+abstract class SetBulkMixin<R, A> implements SemanticSendVisitor<R, A> {
+  R bulkHandleNode(Node node, String message);
+
+  R bulkHandleSet(Send node) {
+    return bulkHandleNode(node, "Assignment `$node` unhandled.");
+  }
+
+  @override
+  R visitDynamicPropertySet(SendSet node, Node receiver, Selector selector, Node rhs, A arg) {
+    return bulkHandleSet(node);
+  }
+
+  @override
+  R visitLocalVariableSet(SendSet node, LocalVariableElement variable, Node rhs, A arg) {
+    return bulkHandleSet(node);
+  }
+
+  @override
+  R visitParameterSet(SendSet node, ParameterElement parameter, Node rhs, A arg) {
+    return bulkHandleSet(node);
+  }
+
+  @override
+  R visitStaticFieldSet(SendSet node, FieldElement field, Node rhs, A arg) {
+    return bulkHandleSet(node);
+  }
+
+  @override
+  R visitStaticSetterSet(SendSet node, FunctionElement setter, Node rhs, A arg) {
+    return bulkHandleSet(node);
+  }
+
+  @override
+  R visitSuperFieldSet(SendSet node, FieldElement field, Node rhs, A arg) {
+    return bulkHandleSet(node);
+  }
+
+  @override
+  R visitSuperSetterSet(SendSet node, FunctionElement setter, Node rhs, A arg) {
+    return bulkHandleSet(node);
+  }
+
+  @override
+  R visitThisPropertySet(SendSet node, Selector selector, Node rhs, A arg) {
+    return bulkHandleSet(node);
+  }
+
+  @override
+  R visitTopLevelFieldSet(SendSet node, FieldElement field, Node rhs, A arg) {
+    return bulkHandleSet(node);
+  }
+
+  @override
+  R visitTopLevelSetterSet(SendSet node, FunctionElement setter, Node rhs, A arg) {
+    return bulkHandleSet(node);
+  }
+}
+
+/// Mixin that implements all `visitXIndexSet` methods of [SemanticSendVisitor] by
+/// delegating to a bulk handler.
+///
+/// Use this mixin to provide a trivial implementation for all `visitXIndexSet`
+/// methods.
+abstract class IndexSetBulkMixin<R, A> implements SemanticSendVisitor<R, A> {
+  R bulkHandleNode(Node node, String message);
+
+  R bulkHandleIndexSet(Send node) {
+    return bulkHandleNode(node, "Index set expression `$node` unhandled.");
+  }
+
+  @override
+  R visitCompoundIndexSet(Send node, Node receiver, Node index, AssignmentOperator operator, Node rhs, A arg) {
+    return bulkHandleIndexSet(node);
+  }
+
+  @override
+  R visitIndexSet(Send node, Node receiver, Node index, Node rhs, A arg) {
+    return bulkHandleIndexSet(node);
+  }
+
+  @override
+  R visitSuperCompoundIndexSet(Send node, FunctionElement getter, FunctionElement setter, Node index, AssignmentOperator operator, Node rhs, A arg) {
+    return bulkHandleIndexSet(node);
+  }
+
+  @override
+  R visitSuperIndexSet(Send node, FunctionElement function, Node index, Node rhs, A arg) {
+    return bulkHandleIndexSet(node);
+  }
+}
+
+/// Mixin that implements all binary visitor methods in [SemanticSendVisitor] by
+/// delegating to a bulk handler.
+///
+/// Use this mixin to provide a trivial implementation for all binary visitor
+/// methods.
+abstract class BinaryBulkMixin<R, A> implements SemanticSendVisitor<R, A> {
+  R bulkHandleNode(Node node, String message);
+
+  R bulkHandleBinary(Send node) {
+    return bulkHandleNode(node, "Binary expression `$node` unhandled.");
+  }
+
+  @override
+  R visitBinary(Send node, Node left, BinaryOperator operator, Node right, A arg) {
+    return bulkHandleBinary(node);
+  }
+
+  @override
+  R visitEquals(Send node, Node left, Node right, A arg) {
+    return bulkHandleBinary(node);
+  }
+
+  @override
+  R visitNotEquals(Send node, Node left, Node right, A arg) {
+    return bulkHandleBinary(node);
+  }
+
+  @override
+  R visitSuperBinary(Send node, FunctionElement function, BinaryOperator operator, Node argument, A arg) {
+    return bulkHandleBinary(node);
+  }
+
+  @override
+  R visitSuperEquals(Send node, FunctionElement function, Node argument, A arg) {
+    return bulkHandleBinary(node);
+  }
+
+  @override
+  R visitSuperNotEquals(Send node, FunctionElement function, Node argument, A arg) {
+    return bulkHandleBinary(node);
+  }
+}
+
+/// Mixin that implements all unary visitor methods in [SemanticSendVisitor] by
+/// delegating to a bulk handler.
+///
+/// Use this mixin to provide a trivial implementation for all unary visitor
+/// methods.
+abstract class UnaryBulkMixin<R, A> implements SemanticSendVisitor<R, A> {
+  R bulkHandleNode(Node node, String message);
+
+  R bulkHandleUnary(Send node) {
+    return bulkHandleNode(node, "Unary expression `$node` unhandled.");
+  }
+
+  @override
+  R visitNot(Send node, Node expression, A arg) {
+    return bulkHandleUnary(node);
+  }
+
+  @override
+  R visitSuperUnary(Send node, UnaryOperator operator,
+                    FunctionElement function, A arg) {
+    return bulkHandleUnary(node);
+  }
+
+  @override
+  R visitUnary(Send node, UnaryOperator operator, Node expression, A arg) {
+    return bulkHandleUnary(node);
+  }
+}
+
+/// Mixin that implements all purely structural visitor methods in
+/// [SemanticSendVisitor] by delegating to a bulk handler.
+///
+/// Use this mixin to provide a trivial implementation for all purely structural
+/// visitor methods.
+abstract class BaseBulkMixin<R, A> implements SemanticSendVisitor<R, A> {
+  R bulkHandleNode(Node node, String message);
+
+  @override
+  R visitAs(Send node, Node expression, DartType type, A arg) {
+    return bulkHandleNode(node, 'As cast `$node` unhandled.');
+  }
+
+  @override
+  R visitAssert(Send node, Node expression, A arg) {
+    return bulkHandleNode(node, 'Assert `$node` unhandled.');
+  }
+
+  @override
+  R visitIs(Send node, Node expression, DartType type, A arg) {
+    return bulkHandleNode(node, 'Is test `$node` unhandled.');
+  }
+
+  @override
+  R visitIsNot(Send node, Node expression, DartType type, A arg) {
+    return bulkHandleNode(node, 'Is not test `$node` unhandled.');
+  }
+
+  @override
+  R visitLogicalAnd(Send node, Node left, Node right, A arg) {
+    return bulkHandleNode(node, 'Lazy and `$node` unhandled.');
+  }
+
+  @override
+  R visitLogicalOr(Send node, Node left, Node right, A arg) {
+    return bulkHandleNode(node, 'Lazy or `$node` unhandled.');
+  }
+}
+
+/// Mixin that implements all visitor methods for `super` calls in
+/// [SemanticSendVisitor] by delegating to a bulk handler.
+///
+/// Use this mixin to provide a trivial implementation for `super` calls
+/// visitor methods.
+abstract class SuperBulkMixin<R, A> implements SemanticSendVisitor<R, A> {
+  R bulkHandleNode(Node node, String message);
+
+  R bulkHandleSuper(Send node) {
+    return bulkHandleNode(node, "Super call `$node` unhandled.");
+  }
+
+  @override
+  R visitSuperBinary(Send node, FunctionElement function, BinaryOperator operator, Node argument, A arg) {
+    return bulkHandleSuper(node);
+  }
+
+  @override
+  R visitSuperCompoundIndexSet(Send node, FunctionElement getter, FunctionElement setter, Node index, AssignmentOperator operator, Node rhs, A arg) {
+    return bulkHandleSuper(node);
+  }
+
+  @override
+  R visitSuperEquals(Send node, FunctionElement function, Node argument, A arg) {
+    return bulkHandleSuper(node);
+  }
+
+  @override
+  R visitSuperFieldCompound(Send node, FieldElement field, AssignmentOperator operator, Node rhs, A arg) {
+    return bulkHandleSuper(node);
+  }
+
+  @override
+  R visitSuperFieldFieldPostfix(Send node, FieldElement readField, FieldElement writtenField, IncDecOperator operator, A arg) {
+    return bulkHandleSuper(node);
+  }
+
+  @override
+  R visitSuperFieldFieldPrefix(Send node, FieldElement readField, FieldElement writtenField, IncDecOperator operator, A arg) {
+    return bulkHandleSuper(node);
+  }
+
+  @override
+  R visitSuperFieldGet(Send node, FieldElement field, A arg) {
+    return bulkHandleSuper(node);
+  }
+
+  @override
+  R visitSuperFieldInvoke(Send node, FieldElement field, NodeList arguments, Selector selector, A arg) {
+    return bulkHandleSuper(node);
+  }
+
+  @override
+  R visitSuperFieldPostfix(Send node, FieldElement field, IncDecOperator operator, A arg) {
+    return bulkHandleSuper(node);
+  }
+
+  @override
+  R visitSuperFieldPrefix(Send node, FieldElement field, IncDecOperator operator, A arg) {
+    return bulkHandleSuper(node);
+  }
+
+  @override
+  R visitSuperFieldSet(SendSet node, FieldElement field, Node rhs, A arg) {
+    return bulkHandleSuper(node);
+  }
+
+  @override
+  R visitSuperFieldSetterCompound(Send node, FieldElement field, FunctionElement setter, AssignmentOperator operator, Node rhs, A arg) {
+    return bulkHandleSuper(node);
+  }
+
+  @override
+  R visitSuperFieldSetterPostfix(Send node, FieldElement field, FunctionElement setter, IncDecOperator operator, A arg) {
+    return bulkHandleSuper(node);
+  }
+
+  @override
+  R visitSuperFieldSetterPrefix(Send node, FieldElement field, FunctionElement setter, IncDecOperator operator, A arg) {
+    return bulkHandleSuper(node);
+  }
+
+  @override
+  R visitSuperGetterFieldCompound(Send node, FunctionElement getter, FieldElement field, AssignmentOperator operator, Node rhs, A arg) {
+    return bulkHandleSuper(node);
+  }
+
+  @override
+  R visitSuperGetterFieldPostfix(Send node, FunctionElement getter, FieldElement field, IncDecOperator operator, A arg) {
+    return bulkHandleSuper(node);
+  }
+
+  @override
+  R visitSuperGetterFieldPrefix(Send node, FunctionElement getter, FieldElement field, IncDecOperator operator, A arg) {
+    return bulkHandleSuper(node);
+  }
+
+  @override
+  R visitSuperGetterGet(Send node, FunctionElement getter, A arg) {
+    return bulkHandleSuper(node);
+  }
+
+  @override
+  R visitSuperGetterInvoke(Send node, FunctionElement getter, NodeList arguments, Selector selector, A arg) {
+    return bulkHandleSuper(node);
+  }
+
+  @override
+  R visitSuperGetterSetterCompound(Send node, FunctionElement getter, FunctionElement setter, AssignmentOperator operator, Node rhs, A arg) {
+    return bulkHandleSuper(node);
+  }
+
+  @override
+  R visitSuperGetterSetterPostfix(Send node, FunctionElement getter, FunctionElement setter, IncDecOperator operator, A arg) {
+    return bulkHandleSuper(node);
+  }
+
+  @override
+  R visitSuperGetterSetterPrefix(Send node, FunctionElement getter, FunctionElement setter, IncDecOperator operator, A arg) {
+    return bulkHandleSuper(node);
+  }
+
+  @override
+  R visitSuperIndexSet(Send node, FunctionElement function, Node index, Node rhs, A arg) {
+    return bulkHandleSuper(node);
+  }
+
+  @override
+  R visitSuperMethodGet(Send node, MethodElement method, A arg) {
+    return bulkHandleSuper(node);
+  }
+
+  @override
+  R visitSuperMethodInvoke(Send node, MethodElement method, NodeList arguments, Selector selector, A arg) {
+    return bulkHandleSuper(node);
+  }
+
+  @override
+  R visitSuperMethodSetterCompound(Send node, FunctionElement method, FunctionElement setter, AssignmentOperator operator, Node rhs, A arg) {
+    return bulkHandleSuper(node);
+  }
+
+  @override
+  R visitSuperMethodSetterPostfix(Send node, FunctionElement method, FunctionElement setter, IncDecOperator operator, A arg) {
+    return bulkHandleSuper(node);
+  }
+
+  @override
+  R visitSuperMethodSetterPrefix(Send node, FunctionElement method, FunctionElement setter, IncDecOperator operator, A arg) {
+    return bulkHandleSuper(node);
+  }
+
+  @override
+  R visitSuperNotEquals(Send node, FunctionElement function, Node argument, A arg) {
+    return bulkHandleSuper(node);
+  }
+
+  @override
+  R visitSuperSetterSet(SendSet node, FunctionElement setter, Node rhs, A arg) {
+    return bulkHandleSuper(node);
+  }
+
+  @override
+  R visitSuperUnary(Send node, UnaryOperator operator, FunctionElement function, A arg) {
+    return bulkHandleSuper(node);
+  }
+}
+
+/// Visitor that implements [SemanticSendVisitor] by the use of `BulkX` mixins.
+///
+/// This class is useful in itself, but shows how to use the `BulkX` mixins and
+/// tests that the union of the `BulkX` mixins implement all `visit` and `error`
+/// methods of [SemanticSendVisitor].
+class BulkVisitor<R, A> extends SemanticSendVisitor<R, A>
+    with GetBulkMixin<R, A>,
+         SetBulkMixin<R, A>,
+         ErrorBulkMixin<R, A>,
+         InvokeBulkMixin<R, A>,
+         IndexSetBulkMixin<R, A>,
+         CompoundBulkMixin<R, A>,
+         UnaryBulkMixin<R, A>,
+         BaseBulkMixin<R, A>,
+         BinaryBulkMixin<R, A>,
+         PrefixBulkMixin<R, A>,
+         PostfixBulkMixin<R, A> {
+
+  @override
+  R apply(Node node, A arg) {
+    throw new UnimplementedError("BulkVisitor.apply unimplemented");
+  }
+
+  @override
+  R bulkHandleNode(Node node, String message) {
+    throw new UnimplementedError("BulkVisitor.bulkHandleNode unimplemented");
+  }
+}
+
+/// [SemanticSendVisitor] that visits subnodes.
+class TraversalMixin<R, A> implements SemanticSendVisitor<R, A> {
+  @override
+  R apply(Node node, A arg) {
+    throw new UnimplementedError("TraversalMixin.apply unimplemented");
+  }
+
+  @override
+  R errorInvalidAssert(Send node, NodeList arguments, A arg) {
+    apply(arguments, arg);
+    return null;
+  }
+
+  @override
+  R errorClassTypeLiteralSet(SendSet node, TypeConstantExpression constant, Node rhs, A arg) {
+    apply(rhs, arg);
+    return null;
+  }
+
+  @override
+  R errorDynamicTypeLiteralSet(SendSet node, TypeConstantExpression constant, Node rhs, A arg) {
+    apply(rhs, arg);
+    return null;
+  }
+
+  @override
+  R errorFinalLocalVariableCompound(Send node, LocalVariableElement variable, AssignmentOperator operator, Node rhs, A arg) {
+    apply(rhs, arg);
+    return null;
+  }
+
+  @override
+  R errorFinalLocalVariableSet(SendSet node, LocalVariableElement variable, Node rhs, A arg) {
+    apply(rhs, arg);
+    return null;
+  }
+
+  @override
+  R errorFinalParameterCompound(Send node, ParameterElement parameter, AssignmentOperator operator, Node rhs, A arg) {
+    apply(rhs, arg);
+    return null;
+  }
+
+  @override
+  R errorFinalParameterSet(SendSet node, ParameterElement parameter, Node rhs, A arg) {
+    apply(rhs, arg);
+    return null;
+  }
+
+  @override
+  R errorFinalStaticFieldCompound(Send node, FieldElement field, AssignmentOperator operator, Node rhs, A arg) {
+    apply(rhs, arg);
+    return null;
+  }
+
+  @override
+  R errorFinalStaticFieldSet(SendSet node, FieldElement field, Node rhs, A arg) {
+    apply(rhs, arg);
+    return null;
+  }
+
+  @override
+  R errorFinalSuperFieldCompound(Send node, FieldElement field, AssignmentOperator operator, Node rhs, A arg) {
+    apply(rhs, arg);
+    return null;
+  }
+
+  @override
+  R errorFinalSuperFieldSet(SendSet node, FieldElement field, Node rhs, A arg) {
+    apply(rhs, arg);
+    return null;
+  }
+
+  @override
+  R errorFinalTopLevelFieldCompound(Send node, FieldElement field, AssignmentOperator operator, Node rhs, A arg) {
+    apply(rhs, arg);
+    return null;
+  }
+
+  @override
+  R errorFinalTopLevelFieldSet(SendSet node, FieldElement field, Node rhs, A arg) {
+    apply(rhs, arg);
+    return null;
+  }
+
+  @override
+  R errorLocalFunctionCompound(Send node, LocalFunctionElement function, AssignmentOperator operator, Node rhs, A arg) {
+    apply(rhs, arg);
+    return null;
+  }
+
+  @override
+  R errorLocalFunctionPostfix(Send node, LocalFunctionElement function, IncDecOperator operator, A arg) {
+    return null;
+  }
+
+  @override
+  R errorLocalFunctionPrefix(Send node, LocalFunctionElement function, IncDecOperator operator, A arg) {
+    return null;
+  }
+
+  @override
+  R errorLocalFunctionSet(SendSet node, LocalFunctionElement function, Node rhs, A arg) {
+    apply(rhs, arg);
+    return null;
+  }
+
+  @override
+  R errorStaticFunctionSet(Send node, MethodElement function, Node rhs, A arg) {
+    apply(rhs, arg);
+    return null;
+  }
+
+  @override
+  R errorStaticGetterSet(SendSet node, FunctionElement getter, Node rhs, A arg) {
+    apply(rhs, arg);
+    return null;
+  }
+
+  @override
+  R errorStaticSetterGet(Send node, FunctionElement setter, A arg) {
+    return null;
+  }
+
+  @override
+  R errorStaticSetterInvoke(Send node, FunctionElement setter, NodeList arguments, Selector selector, A arg) {
+    apply(arguments, arg);
+    return null;
+  }
+
+  @override
+  R errorSuperGetterSet(SendSet node, FunctionElement getter, Node rhs, A arg) {
+    apply(rhs, arg);
+    return null;
+  }
+
+  @override
+  R errorSuperMethodSet(Send node, MethodElement method, Node rhs, A arg) {
+    apply(rhs, arg);
+    return null;
+  }
+
+  @override
+  R errorSuperSetterGet(Send node, FunctionElement setter, A arg) {
+    return null;
+  }
+
+  @override
+  R errorSuperSetterInvoke(Send node, FunctionElement setter, NodeList arguments, Selector selector, A arg) {
+    apply(arguments, arg);
+    return null;
+  }
+
+  @override
+  R errorTopLevelFunctionSet(Send node, MethodElement function, Node rhs, A arg) {
+    apply(rhs, arg);
+    return null;
+  }
+
+  @override
+  R errorTopLevelGetterSet(SendSet node, FunctionElement getter, Node rhs, A arg) {
+    apply(rhs, arg);
+    return null;
+  }
+
+  @override
+  R errorTopLevelSetterGet(Send node, FunctionElement setter, A arg) {
+    return null;
+  }
+
+  @override
+  R errorTopLevelSetterInvoke(Send node, FunctionElement setter, NodeList arguments, Selector selector, A arg) {
+    apply(arguments, arg);
+    return null;
+  }
+
+  @override
+  R errorTypeVariableTypeLiteralSet(SendSet node, TypeVariableElement element, Node rhs, A arg) {
+    apply(rhs, arg);
+    return null;
+  }
+
+  @override
+  R errorTypedefTypeLiteralSet(SendSet node, TypeConstantExpression constant, Node rhs, A arg) {
+    apply(rhs, arg);
+    return null;
+  }
+
+  @override
+  R visitAs(Send node, Node expression, DartType type, A arg) {
+    apply(expression, arg);
+    return null;
+  }
+
+  @override
+  R visitAssert(Send node, Node expression, A arg) {
+    apply(expression, arg);
+    return null;
+  }
+
+  @override
+  R visitBinary(Send node, Node left, BinaryOperator operator, Node right, A arg) {
+    apply(left, arg);
+    apply(right, arg);
+    return null;
+  }
+
+  @override
+  R visitClassTypeLiteralCompound(Send node, TypeConstantExpression constant, AssignmentOperator operator, Node rhs, A arg) {
+    apply(rhs, arg);
+    return null;
+  }
+
+  @override
+  R visitClassTypeLiteralGet(Send node, TypeConstantExpression constant, A arg) {
+    return null;
+  }
+
+  @override
+  R visitClassTypeLiteralInvoke(Send node, TypeConstantExpression constant, NodeList arguments, Selector selector, A arg) {
+    apply(arguments, arg);
+    return null;
+  }
+
+  @override
+  R visitClassTypeLiteralPostfix(Send node, TypeConstantExpression constant, IncDecOperator operator, A arg) {
+    return null;
+  }
+
+  @override
+  R visitClassTypeLiteralPrefix(Send node, TypeConstantExpression constant, IncDecOperator operator, A arg) {
+    return null;
+  }
+
+  @override
+  R visitCompoundIndexSet(Send node, Node receiver, Node index, AssignmentOperator operator, Node rhs, A arg) {
+    apply(receiver, arg);
+    apply(index, arg);
+    apply(rhs, arg);
+    return null;
+  }
+
+  @override
+  R visitConstantGet(Send node, ConstantExpression constant, A arg) {
+    return null;
+  }
+
+  @override
+  R visitConstantInvoke(Send node, ConstantExpression constant, NodeList arguments, Selector selector, A arg) {
+    apply(arguments, arg);
+    return null;
+  }
+
+  @override
+  R visitDynamicPropertyCompound(Send node, Node receiver, AssignmentOperator operator, Node rhs, Selector getterSelector, Selector setterSelector, A arg) {
+    apply(receiver, arg);
+    apply(rhs, arg);
+    return null;
+  }
+
+  @override
+  R visitDynamicPropertyGet(Send node, Node receiver, Selector selector, A arg) {
+    apply(receiver, arg);
+    return null;
+  }
+
+  @override
+  R visitDynamicPropertyInvoke(Send node, Node receiver, NodeList arguments, Selector selector, A arg) {
+    apply(receiver, arg);
+    apply(arguments, arg);
+    return null;
+  }
+
+  @override
+  R visitDynamicPropertyPostfix(Send node, Node receiver, IncDecOperator operator, Selector getterSelector, Selector setterSelector, A arg) {
+    apply(receiver, arg);
+    return null;
+  }
+
+  @override
+  R visitDynamicPropertyPrefix(Send node, Node receiver, IncDecOperator operator, Selector getterSelector, Selector setterSelector, A arg) {
+    apply(receiver, arg);
+    return null;
+  }
+
+  @override
+  R visitDynamicPropertySet(SendSet node, Node receiver, Selector selector, Node rhs, A arg) {
+    apply(rhs, arg);
+    return null;
+  }
+
+  @override
+  R visitDynamicTypeLiteralCompound(Send node, TypeConstantExpression constant, AssignmentOperator operator, Node rhs, A arg) {
+    apply(rhs, arg);
+    return null;
+  }
+
+  @override
+  R visitDynamicTypeLiteralGet(Send node, TypeConstantExpression constant, A arg) {
+    return null;
+  }
+
+  @override
+  R visitDynamicTypeLiteralInvoke(Send node, TypeConstantExpression constant, NodeList arguments, Selector selector, A arg) {
+    apply(arguments, arg);
+    return null;
+  }
+
+  @override
+  R visitDynamicTypeLiteralPostfix(Send node, TypeConstantExpression constant, IncDecOperator operator, A arg) {
+    return null;
+  }
+
+  @override
+  R visitDynamicTypeLiteralPrefix(Send node, TypeConstantExpression constant, IncDecOperator operator, A arg) {
+    return null;
+  }
+
+  @override
+  R visitEquals(Send node, Node left, Node right, A arg) {
+    apply(left, arg);
+    apply(right, arg);
+    return null;
+  }
+
+  @override
+  R visitExpressionInvoke(Send node, Node expression, NodeList arguments, Selector selector, A arg) {
+    apply(expression, arg);
+    apply(arguments, arg);
+    return null;
+  }
+
+  @override
+  R visitIndexSet(Send node, Node receiver, Node index, Node rhs, A arg) {
+    apply(receiver, arg);
+    apply(index, arg);
+    apply(rhs, arg);
+    return null;
+  }
+
+  @override
+  R visitIs(Send node, Node expression, DartType type, A arg) {
+    apply(expression, arg);
+    return null;
+  }
+
+  @override
+  R visitIsNot(Send node, Node expression, DartType type, A arg) {
+    apply(expression, arg);
+    return null;
+  }
+
+  @override
+  R visitLocalFunctionGet(Send node, LocalFunctionElement function, A arg) {
+    return null;
+  }
+
+  @override
+  R visitLocalFunctionInvoke(Send node, LocalFunctionElement function, NodeList arguments, Selector selector, A arg) {
+    apply(arguments, arg);
+    return null;
+  }
+
+  @override
+  R visitLocalVariableCompound(Send node, LocalVariableElement variable, AssignmentOperator operator, Node rhs, A arg) {
+    apply(rhs, arg);
+    return null;
+  }
+
+  @override
+  R visitLocalVariableGet(Send node, LocalVariableElement variable, A arg) {
+    return null;
+  }
+
+  @override
+  R visitLocalVariableInvoke(Send node, LocalVariableElement variable, NodeList arguments, Selector selector, A arg) {
+    apply(arguments, arg);
+    return null;
+  }
+
+  @override
+  R visitLocalVariablePostfix(Send node, LocalVariableElement variable, IncDecOperator operator, A arg) {
+    return null;
+  }
+
+  @override
+  R visitLocalVariablePrefix(Send node, LocalVariableElement variable, IncDecOperator operator, A arg) {
+    return null;
+  }
+
+  @override
+  R visitLocalVariableSet(SendSet node, LocalVariableElement variable, Node rhs, A arg) {
+    apply(rhs, arg);
+    return null;
+  }
+
+  @override
+  R visitLogicalAnd(Send node, Node left, Node right, A arg) {
+    apply(left, arg);
+    apply(right, arg);
+    return null;
+  }
+
+  @override
+  R visitLogicalOr(Send node, Node left, Node right, A arg) {
+    apply(left, arg);
+    apply(right, arg);
+    return null;
+  }
+
+  @override
+  R visitNot(Send node, Node expression, A arg) {
+    apply(expression, arg);
+    return null;
+  }
+
+  @override
+  R visitNotEquals(Send node, Node left, Node right, A arg) {
+    apply(left, arg);
+    apply(right, arg);
+    return null;
+  }
+
+  @override
+  R visitParameterCompound(Send node, ParameterElement parameter, AssignmentOperator operator, Node rhs, A arg) {
+    apply(rhs, arg);
+    return null;
+  }
+
+  @override
+  R visitParameterGet(Send node, ParameterElement parameter, A arg) {
+    return null;
+  }
+
+  @override
+  R visitParameterInvoke(Send node, ParameterElement parameter, NodeList arguments, Selector selector, A arg) {
+    apply(arguments, arg);
+    return null;
+  }
+
+  @override
+  R visitParameterPostfix(Send node, ParameterElement parameter, IncDecOperator operator, A arg) {
+    return null;
+  }
+
+  @override
+  R visitParameterPrefix(Send node, ParameterElement parameter, IncDecOperator operator, A arg) {
+    return null;
+  }
+
+  @override
+  R visitParameterSet(SendSet node, ParameterElement parameter, Node rhs, A arg) {
+    apply(rhs, arg);
+    return null;
+  }
+
+  @override
+  R visitStaticFieldCompound(Send node, FieldElement field, AssignmentOperator operator, Node rhs, A arg) {
+    apply(rhs, arg);
+    return null;
+  }
+
+  @override
+  R visitStaticFieldGet(Send node, FieldElement field, A arg) {
+    return null;
+  }
+
+  @override
+  R visitStaticFieldInvoke(Send node, FieldElement field, NodeList arguments, Selector selector, A arg) {
+    apply(arguments, arg);
+    return null;
+  }
+
+  @override
+  R visitStaticFieldPostfix(Send node, FieldElement field, IncDecOperator operator, A arg) {
+    return null;
+  }
+
+  @override
+  R visitStaticFieldPrefix(Send node, FieldElement field, IncDecOperator operator, A arg) {
+    return null;
+  }
+
+  @override
+  R visitStaticFieldSet(SendSet node, FieldElement field, Node rhs, A arg) {
+    apply(rhs, arg);
+    return null;
+  }
+
+  @override
+  R visitStaticFunctionGet(Send node, MethodElement function, A arg) {
+    return null;
+  }
+
+  @override
+  R visitStaticFunctionInvoke(Send node, MethodElement function, NodeList arguments, Selector selector, A arg) {
+    apply(arguments, arg);
+    return null;
+  }
+
+  @override
+  R visitStaticGetterGet(Send node, FunctionElement getter, A arg) {
+    return null;
+  }
+
+  @override
+  R visitStaticGetterInvoke(Send node, FunctionElement getter, NodeList arguments, Selector selector, A arg) {
+    apply(arguments, arg);
+    return null;
+  }
+
+  @override
+  R visitStaticGetterSetterCompound(Send node, FunctionElement getter, FunctionElement setter, AssignmentOperator operator, Node rhs, A arg) {
+    apply(rhs, arg);
+    return null;
+  }
+
+  @override
+  R visitStaticGetterSetterPostfix(Send node, FunctionElement getter, FunctionElement setter, IncDecOperator operator, A arg) {
+    return null;
+  }
+
+  @override
+  R visitStaticGetterSetterPrefix(Send node, FunctionElement getter, FunctionElement setter, IncDecOperator operator, A arg) {
+    return null;
+  }
+
+  @override
+  R visitStaticMethodSetterCompound(Send node, FunctionElement method, FunctionElement setter, AssignmentOperator operator, Node rhs, A arg) {
+    apply(rhs, arg);
+    return null;
+  }
+
+  @override
+  R visitStaticMethodSetterPostfix(Send node, FunctionElement getter, FunctionElement setter, IncDecOperator operator, A arg) {
+    return null;
+  }
+
+  @override
+  R visitStaticMethodSetterPrefix(Send node, FunctionElement getter, FunctionElement setter, IncDecOperator operator, A arg) {
+    return null;
+  }
+
+  @override
+  R visitStaticSetterSet(SendSet node, FunctionElement setter, Node rhs, A arg) {
+    apply(rhs, arg);
+    return null;
+  }
+
+  @override
+  R visitSuperBinary(Send node, FunctionElement function, BinaryOperator operator, Node argument, A arg) {
+    apply(argument, arg);
+    return null;
+  }
+
+  @override
+  R visitSuperCompoundIndexSet(Send node, FunctionElement getter, FunctionElement setter, Node index, AssignmentOperator operator, Node rhs, A arg) {
+    apply(rhs, arg);
+    return null;
+  }
+
+  @override
+  R visitSuperEquals(Send node, FunctionElement function, Node argument, A arg) {
+    apply(argument, arg);
+    return null;
+  }
+
+  @override
+  R visitSuperFieldCompound(Send node, FieldElement field, AssignmentOperator operator, Node rhs, A arg) {
+    apply(rhs, arg);
+    return null;
+  }
+
+  @override
+  R visitSuperFieldFieldPostfix(Send node, FieldElement readField, FieldElement writtenField, IncDecOperator operator, A arg) {
+    return null;
+  }
+
+  @override
+  R visitSuperFieldFieldPrefix(Send node, FieldElement readField, FieldElement writtenField, IncDecOperator operator, A arg) {
+    return null;
+  }
+
+  @override
+  R visitSuperFieldGet(Send node, FieldElement field, A arg) {
+    return null;
+  }
+
+  @override
+  R visitSuperFieldInvoke(Send node, FieldElement field, NodeList arguments, Selector selector, A arg) {
+    apply(arguments, arg);
+    return null;
+  }
+
+  @override
+  R visitSuperFieldPostfix(Send node, FieldElement field, IncDecOperator operator, A arg) {
+    return null;
+  }
+
+  @override
+  R visitSuperFieldPrefix(Send node, FieldElement field, IncDecOperator operator, A arg) {
+    return null;
+  }
+
+  @override
+  R visitSuperFieldSet(SendSet node, FieldElement field, Node rhs, A arg) {
+    apply(rhs, arg);
+    return null;
+  }
+
+  @override
+  R visitSuperFieldSetterCompound(Send node, FieldElement field, FunctionElement setter, AssignmentOperator operator, Node rhs, A arg) {
+    apply(rhs, arg);
+    return null;
+  }
+
+  @override
+  R visitSuperFieldSetterPostfix(Send node, FieldElement field, FunctionElement setter, IncDecOperator operator, A arg) {
+    return null;
+  }
+
+  @override
+  R visitSuperFieldSetterPrefix(Send node, FieldElement field, FunctionElement setter, IncDecOperator operator, A arg) {
+    return null;
+  }
+
+  @override
+  R visitSuperGetterFieldCompound(Send node, FunctionElement getter, FieldElement field, AssignmentOperator operator, Node rhs, A arg) {
+    apply(rhs, arg);
+    return null;
+  }
+
+  @override
+  R visitSuperGetterFieldPostfix(Send node, FunctionElement getter, FieldElement field, IncDecOperator operator, A arg) {
+    return null;
+  }
+
+  @override
+  R visitSuperGetterFieldPrefix(Send node, FunctionElement getter, FieldElement field, IncDecOperator operator, A arg) {
+    return null;
+  }
+
+  @override
+  R visitSuperGetterGet(Send node, FunctionElement getter, A arg) {
+    return null;
+  }
+
+  @override
+  R visitSuperGetterInvoke(Send node, FunctionElement getter, NodeList arguments, Selector selector, A arg) {
+    apply(arguments, arg);
+    return null;
+  }
+
+  @override
+  R visitSuperGetterSetterCompound(Send node, FunctionElement getter, FunctionElement setter, AssignmentOperator operator, Node rhs, A arg) {
+    apply(rhs, arg);
+    return null;
+  }
+
+  @override
+  R visitSuperGetterSetterPostfix(Send node, FunctionElement getter, FunctionElement setter, IncDecOperator operator, A arg) {
+    return null;
+  }
+
+  @override
+  R visitSuperGetterSetterPrefix(Send node, FunctionElement getter, FunctionElement setter, IncDecOperator operator, A arg) {
+    return null;
+  }
+
+  @override
+  R visitSuperIndexSet(Send node, FunctionElement function, Node index, Node rhs, A arg) {
+    apply(index, arg);
+    apply(rhs, arg);
+    return null;
+  }
+
+  @override
+  R visitSuperMethodGet(Send node, MethodElement method, A arg) {
+    return null;
+  }
+
+  @override
+  R visitSuperMethodInvoke(Send node, MethodElement method, NodeList arguments, Selector selector, A arg) {
+    apply(arguments, arg);
+    return null;
+  }
+
+  @override
+  R visitSuperMethodSetterCompound(Send node, FunctionElement method, FunctionElement setter, AssignmentOperator operator, Node rhs, A arg) {
+    apply(rhs, arg);
+    return null;
+  }
+
+  @override
+  R visitSuperMethodSetterPostfix(Send node, FunctionElement method, FunctionElement setter, IncDecOperator operator, A arg) {
+    return null;
+  }
+
+  @override
+  R visitSuperMethodSetterPrefix(Send node, FunctionElement method, FunctionElement setter, IncDecOperator operator, A arg) {
+    return null;
+  }
+
+  @override
+  R visitSuperNotEquals(Send node, FunctionElement function, Node argument, A arg) {
+    apply(argument, arg);
+    return null;
+  }
+
+  @override
+  R visitSuperSetterSet(SendSet node, FunctionElement setter, Node rhs, A arg) {
+    apply(rhs, arg);
+    return null;
+  }
+
+  @override
+  R visitSuperUnary(Send node, UnaryOperator operator, FunctionElement function, A arg) {
+    return null;
+  }
+
+  @override
+  R visitThisGet(Identifier node, A arg) {
+    return null;
+  }
+
+  @override
+  R visitThisInvoke(Send node, NodeList arguments, Selector selector, A arg) {
+    apply(arguments, arg);
+    return null;
+  }
+
+  @override
+  R visitThisPropertyCompound(Send node, AssignmentOperator operator, Node rhs, Selector getterSelector, Selector setterSelector, A arg) {
+    apply(rhs, arg);
+    return null;
+  }
+
+  @override
+  R visitThisPropertyGet(Send node, Selector selector, A arg) {
+    return null;
+  }
+
+  @override
+  R visitThisPropertyInvoke(Send node, NodeList arguments, Selector selector, A arg) {
+    apply(arguments, arg);
+    return null;
+  }
+
+  @override
+  R visitThisPropertyPostfix(Send node, IncDecOperator operator, Selector getterSelector, Selector setterSelector, A arg) {
+    return null;
+  }
+
+  @override
+  R visitThisPropertyPrefix(Send node, IncDecOperator operator, Selector getterSelector, Selector setterSelector, A arg) {
+    return null;
+  }
+
+  @override
+  R visitThisPropertySet(SendSet node, Selector selector, Node rhs, A arg) {
+    apply(rhs, arg);
+    return null;
+  }
+
+  @override
+  R visitTopLevelFieldCompound(Send node, FieldElement field, AssignmentOperator operator, Node rhs, A arg) {
+    apply(rhs, arg);
+    return null;
+  }
+
+  @override
+  R visitTopLevelFieldGet(Send node, FieldElement field, A arg) {
+    return null;
+  }
+
+  @override
+  R visitTopLevelFieldInvoke(Send node, FieldElement field, NodeList arguments, Selector selector, A arg) {
+    apply(arguments, arg);
+    return null;
+  }
+
+  @override
+  R visitTopLevelFieldPostfix(Send node, FieldElement field, IncDecOperator operator, A arg) {
+    return null;
+  }
+
+  @override
+  R visitTopLevelFieldPrefix(Send node, FieldElement field, IncDecOperator operator, A arg) {
+    return null;
+  }
+
+  @override
+  R visitTopLevelFieldSet(SendSet node, FieldElement field, Node rhs, A arg) {
+    apply(rhs, arg);
+    return null;
+  }
+
+  @override
+  R visitTopLevelFunctionGet(Send node, MethodElement function, A arg) {
+    return null;
+  }
+
+  @override
+  R visitTopLevelFunctionInvoke(Send node, MethodElement function, NodeList arguments, Selector selector, A arg) {
+    apply(arguments, arg);
+    return null;
+  }
+
+  @override
+  R visitTopLevelGetterGet(Send node, FunctionElement getter, A arg) {
+    return null;
+  }
+
+  @override
+  R visitTopLevelGetterInvoke(Send node, FunctionElement getter, NodeList arguments, Selector selector, A arg) {
+    apply(arguments, arg);
+    return null;
+  }
+
+  @override
+  R visitTopLevelGetterSetterCompound(Send node, FunctionElement getter, FunctionElement setter, AssignmentOperator operator, Node rhs, A arg) {
+    apply(rhs, arg);
+    return null;
+  }
+
+  @override
+  R visitTopLevelGetterSetterPostfix(Send node, FunctionElement getter, FunctionElement setter, IncDecOperator operator, A arg) {
+    return null;
+  }
+
+  @override
+  R visitTopLevelGetterSetterPrefix(Send node, FunctionElement getter, FunctionElement setter, IncDecOperator operator, A arg) {
+    return null;
+  }
+
+  @override
+  R visitTopLevelMethodSetterCompound(Send node, FunctionElement method, FunctionElement setter, AssignmentOperator operator, Node rhs, A arg) {
+    apply(rhs, arg);
+    return null;
+  }
+
+  @override
+  R visitTopLevelMethodSetterPostfix(Send node, FunctionElement method, FunctionElement setter, IncDecOperator operator, A arg) {
+    return null;
+  }
+
+  @override
+  R visitTopLevelMethodSetterPrefix(Send node, FunctionElement method, FunctionElement setter, IncDecOperator operator, A arg) {
+    return null;
+  }
+
+  @override
+  R visitTopLevelSetterSet(SendSet node, FunctionElement setter, Node rhs, A arg) {
+    apply(rhs, arg);
+    return null;
+  }
+
+  @override
+  R visitTypeVariableTypeLiteralCompound(Send node, TypeVariableElement element, AssignmentOperator operator, Node rhs, A arg) {
+    apply(rhs, arg);
+    return null;
+  }
+
+  @override
+  R visitTypeVariableTypeLiteralGet(Send node, TypeVariableElement element, A arg) {
+    return null;
+  }
+
+  @override
+  R visitTypeVariableTypeLiteralInvoke(Send node, TypeVariableElement element, NodeList arguments, Selector selector, A arg) {
+    apply(arguments, arg);
+    return null;
+  }
+
+  @override
+  R visitTypeVariableTypeLiteralPostfix(Send node, TypeVariableElement element, IncDecOperator operator, A arg) {
+    return null;
+  }
+
+  @override
+  R visitTypeVariableTypeLiteralPrefix(Send node, TypeVariableElement element, IncDecOperator operator, A arg) {
+    return null;
+  }
+
+  @override
+  R visitTypedefTypeLiteralCompound(Send node, TypeConstantExpression constant, AssignmentOperator operator, Node rhs, A arg) {
+    apply(rhs, arg);
+    return null;
+  }
+
+  @override
+  R visitTypedefTypeLiteralGet(Send node, TypeConstantExpression constant, A arg) {
+    return null;
+  }
+
+  @override
+  R visitTypedefTypeLiteralInvoke(Send node, TypeConstantExpression constant, NodeList arguments, Selector selector, A arg) {
+    apply(arguments, arg);
+    return null;
+  }
+
+  @override
+  R visitTypedefTypeLiteralPostfix(Send node, TypeConstantExpression constant, IncDecOperator operator, A arg) {
+    return null;
+  }
+
+  @override
+  R visitTypedefTypeLiteralPrefix(Send node, TypeConstantExpression constant, IncDecOperator operator, A arg) {
+    return null;
+  }
+
+  @override
+  R visitUnary(Send node, UnaryOperator operator, Node expression, A arg) {
+    apply(expression, arg);
+    return null;
+  }
+
+  @override
+  R errorUnresolvedCompound(Send node, Element element, AssignmentOperator operator, Node rhs, A arg) {
+    apply(rhs, arg);
+    return null;
+  }
+
+  @override
+  R errorUnresolvedGet(Send node, Element element, A arg) {
+    return null;
+  }
+
+  @override
+  R errorUnresolvedInvoke(Send node, Element element, NodeList arguments, Selector selector, A arg) {
+    apply(arguments, arg);
+    return null;
+  }
+
+  @override
+  R errorUnresolvedPostfix(Send node, Element element, IncDecOperator operator, A arg) {
+    return null;
+  }
+
+  @override
+  R errorUnresolvedPrefix(Send node, Element element, IncDecOperator operator, A arg) {
+    return null;
+  }
+
+  @override
+  R errorUnresolvedSet(Send node, Element element, Node rhs, A arg) {
+    apply(rhs, arg);
+    return null;
+  }
+
+  @override
+  R errorUndefinedBinaryExpression(Send node, Node left, Operator operator, Node right, A arg) {
+    apply(left, arg);
+    apply(right, arg);
+    return null;
+  }
+
+  @override
+  R errorUndefinedUnaryExpression(Send node, Operator operator, Node expression, A arg) {
+    apply(expression, arg);
+    return null;
+  }
+
+  @override
+  R errorUnresolvedSuperIndexSet(Send node, Element element, Node index, Node rhs, A arg) {
+    apply(index, arg);
+    apply(rhs, arg);
+    return null;
+  }
+
+  @override
+  R errorUnresolvedSuperCompoundIndexSet(Send node, Element element, Node index, AssignmentOperator operator, Node rhs, A arg) {
+    apply(index, arg);
+    apply(rhs, arg);
+    return null;
+  }
+
+  @override
+  R errorUnresolvedSuperBinary(Send node, Element element, BinaryOperator operator, Node argument, A arg) {
+    apply(argument, arg);
+    return null;
+  }
+
+  @override
+  R errorUnresolvedSuperUnary(Send node, UnaryOperator operator, Element element, A arg) {
+    return null;
+  }
+}
+
+/// AST visitor that visits all normal [Send] and [SendSet] nodes using the
+/// [SemanticVisitor].
+class TraversalVisitor<R, A> extends SemanticVisitor<R, A>
+    with TraversalMixin<R, A> {
+  TraversalVisitor(TreeElements elements) : super(elements);
+
+  SemanticSendVisitor<R, A> get sendVisitor => this;
+
+  R apply(Node node, A arg) {
+    node.accept(this);
+    return null;
+  }
+
+  @override
+  internalError(Spannable spannable, String message) {
+    throw new SpannableAssertionFailure(spannable, message);
+  }
+
+  @override
+  R visitNode(Node node) {
+    node.visitChildren(this);
+    return null;
+  }
+
+  @override
+  R visitNewExpression(NewExpression node) {
+    // Bypass the [Send] holding the class/constructor name.
+    return apply(node.send.argumentsNode, null);
+  }
+
+  void visitParameters(NodeList parameters) {
+
+  }
+
+  void visitInitializers(NodeList initializers) {
+    // TODO(johnniwinther): Visit subnodes of initializers.
+  }
+
+  @override
+  R visitFunctionExpression(FunctionExpression node) {
+    if (node.parameters != null) {
+      visitParameters(node.parameters);
+    }
+    if (node.initializers != null) {
+      visitInitializers(node.initializers);
+    }
+    if (node.body != null) {
+      apply(node.body, null);
+    }
+    return null;
+  }
+}