Initial implementation of interpreter for Kernel

pkg/kernel/lib/interpreter/interpreter_visitor.dart

+// Copyright 1(c) 2016, the Dart project authors.  Please see the AUTHORS file

[Kevin Millikin (Google), 2017/03/02 10:30:30]

2017.  A 1 (or maybe an L) has also crept in here.  

+// 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.
+
+/// A library to help move super calls last in the initializer list.
+library kernel.interpreter.interpreter_visitor;
+
+import '../ast.dart';
+
+abstract class ExpressionVisitor1<R> {
+  R defaultExpression1(Expression node, State state) => null;

[Kevin Millikin (Google), 2017/03/02 10:30:30]

We should also generalize all these methods to:

R visitXXX(Expression node, arg) => defaultExpression(node, arg)

Then I'd move this class into visitor.dart.

+
+  R defaultBasicLiteral1(BasicLiteral node, State state) =>
+      defaultExpression1(node, state);
+
+  R visitInvalidExpression1(InvalidExpression node, State state) =>

[Kevin Millikin (Google), 2017/03/02 10:30:30]

We need the '1' on ExpressionVisitor1 and accept1 because they have to coexist
with ExpressionVisitor and accept.  I don't think we need it on
visitInvalidExpression, defaultExpression, etc.

I suggest removing it in all those places because it's kind of ugly and easy to
miss.

+      defaultExpression1(node, state);
+
+  R visitVariableGet1(VariableGet node, State state) =>
+      defaultExpression1(node, state);
+
+  R visitVariableSet1(VariableSet node, State state) =>
+      defaultExpression1(node, state);
+
+  R visitPropertyGet1(PropertyGet node, State state) =>
+      defaultExpression1(node, state);
+
+  R visitPropertySet1(PropertySet node, State state) =>
+      defaultExpression1(node, state);
+
+  R visitDirectPropertyGet1(DirectPropertyGet node, State state) =>
+      defaultExpression1(node, state);
+
+  R visitDirectPropertySet1(DirectPropertySet node, State state) =>
+      defaultExpression1(node, state);
+
+  R visitSuperPropertyGet1(SuperPropertyGet node, State state) =>
+      defaultExpression1(node, state);
+
+  R visitSuperPropertySet1(SuperPropertySet node, State state) =>
+      defaultExpression1(node, state);
+
+  R visitStaticGet1(StaticGet node, State state) =>
+      defaultExpression1(node, state);
+
+  R visitStaticSet1(StaticSet node, State state) =>
+      defaultExpression1(node, state);
+
+  R visitMethodInvocation1(MethodInvocation node, State state) =>
+      defaultExpression1(node, state);
+
+  R visitDirectMethodInvocation1(DirectMethodInvocation node, State state) =>
+      defaultExpression1(node, state);
+
+  R visitSuperMethodInvocation1(SuperMethodInvocation node, State state) =>
+      defaultExpression1(node, state);
+
+  R visitStaticInvocation1(StaticInvocation node, State state) =>
+      defaultExpression1(node, state);
+
+  R visitConstructorInvocation1(ConstructorInvocation node, State state) =>
+      defaultExpression1(node, state);
+
+  R visitNot1(Not node, State state) => defaultExpression1(node, state);
+
+  R visitLogicalExpression1(LogicalExpression node, State state) =>
+      defaultExpression1(node, state);
+
+  R visitConditionalExpression1(ConditionalExpression node, State state) =>
+      defaultExpression1(node, state);
+
+  R visitStringConcatenation1(StringConcatenation node, State state) =>
+      defaultExpression1(node, state);
+
+  R visitIsExpression1(IsExpression node, State state) =>
+      defaultExpression1(node, state);
+
+  R visitAsExpression1(AsExpression node, State state) =>
+      defaultExpression1(node, state);
+
+  R visitSymbolLiteral1(SymbolLiteral node, State state) =>
+      defaultExpression1(node, state);
+
+  R visitTypeLiteral1(TypeLiteral node, State state) =>
+      defaultExpression1(node, state);
+
+  R visitThisExpression1(ThisExpression node, State state) =>
+      defaultExpression1(node, state);
+
+  R visitRethrow1(Rethrow node, State state) => defaultExpression1(node, state);
+
+  R visitThrow1(Throw node, State state) => defaultExpression1(node, state);
+
+  R visitListLiteral1(ListLiteral node, State state) =>
+      defaultExpression1(node, state);
+
+  R visitMapLiteral1(MapLiteral node, State state) =>
+      defaultExpression1(node, state);
+
+  R visitAwaitExpression1(AwaitExpression node, State state) =>
+      defaultExpression1(node, state);
+
+  R visitFunctionExpression1(FunctionExpression node, State state) =>
+      defaultExpression1(node, state);
+
+  R visitStringLiteral1(StringLiteral node, State state) =>
+      defaultBasicLiteral1(node, state);
+
+  R visitIntLiteral1(IntLiteral node, State state) =>
+      defaultBasicLiteral1(node, state);
+
+  R visitDoubleLiteral1(DoubleLiteral node, State state) =>
+      defaultBasicLiteral1(node, state);
+
+  R visitBoolLiteral1(BoolLiteral node, State state) =>
+      defaultBasicLiteral1(node, state);
+
+  R visitNullLiteral1(NullLiteral node, State state) =>
+      defaultBasicLiteral1(node, state);
+
+  R visitLet1(Let node, State state) => defaultExpression1(node, state);
+
+  R visitLoadLibrary1(LoadLibrary node, State state) =>
+      defaultExpression1(node, state);
+
+  R visitCheckLibraryIsLoaded1(CheckLibraryIsLoaded node, State state) =>
+      defaultExpression1(node, state);
+}
+
+abstract class State {

[Kevin Millikin (Google), 2017/03/02 10:30:30]

If we eliminate the type State from the AST and visitor interfaces, we should
eliminate this class.

+  Map<String, Object> get environment;
+}